Super helpful. Anyone else think the Maintenance Mode process feels like a video game cheat code? Thought my Prius was going to start floating or something
I probably will have to do this soon. But I would like to personally tell you, I appreciate you. I have saved money and learned about my car in the process. Thank you kind sir - you have helped a woman not get scammed by these dealers!
NOT great. He did not mention the bleeding valve under the cowl panel that is required by the factory manual. And these 3rd gen cars are prone to engine overheat.
@@AnnaA-fq8ywas I understand it, they found that the bleed valve was unnecessary with the pressurized system, so Toyota eliminated it during the Gen 3 run.
Using a trim removal tool, gently wiggle out the plastic pins that hold the splash shield so you don’t break them. Reinstall them in same location. Have spare plastic pins ready. You want that shield just like it came from the factory.
We were filming the inverter coolant drain and refill video as well, so that’s why the undercarriage panel was off. But yes, you don’t need to remove the panel since there is a hole for the radiator peck cock from the buttom.
Thank you for the video, it helped me so much to do the coolant change and to do the whole process again when I had to replace the water pump. Maybe next time you can add the video about that too, even though is actually not bad to do. Only 2 hours tops.
i'm going thru changing the water pump and thermostat now. if someone doesn't want to remember all those steps for maintenance mode you can just place an item on the accelerator pedal and the car will start and stay running. if you want or need to get to 2500-2700 rpm you can place an item heavy enough to get the pedal to get to those rpm's. bleeding air out of this car was more of a challenge then i thought it would be. had to compress the inlet hose(at the t/stat) many times to prime the pump. good video. thanks.
thank you, we appreciate that :) You can also check out PriusChat forum as well, they are pretty helpful in questions in case you have any problems with your vehicle. :)
@@NutzAboutBolts the fans started kicking on and off so I guess it worked. I have hot air, but what's strange is I'm use to seeing a lot more movement in the water when it kicks on. Also weirdly enough I had it at exactly full and now it's like an inch over full..? That's a first as well
If you turn your heater on "full blast" the gasoline engine will keep running until the engine warms up and cooling fans energize and the heating t-stat opens up. I don't think there's any need for the elaborate "maintenance mode" ordeal.
@@mattgreen4611 I think the coolant runs through the heater core whether you have the heater on or off. It's like a little radiator inside the duct work or heat and air assembly.
If anybody is watching this video just know this process is incorrect! You will be fine if you stick with the same coolant more than likely, but just realize since he didn't drain the cylinder block drain cock plug most of the coolant is still in! Don't accidentally mix it if you're trying to swap colors! Coolant capacity is about 5 more quarts than he was able to get out just draining the radiator and leaving the coolant in the engine!
@@stn7172 pull a line on the exhaust heat exchange and let it drain. For filling you use the burp port near the dash.Just open it though. You fill up to the burp line on the coolant tank.
@paladain55 to clarify I have to fill the coolant reservoir up to the burp fill line in order to open up the burp port? I am having issues with filling my coolant system up.
@@JuanPablo-kt4uh Easiest method is to drain the coolant line going to the exhaust portion and the radiator. When it finishes, fill from the bleed port on the top of the engine near the firewall, and finish up with the coolant resevoir. Theres a hump in the system at the engine block so one side will drain and one wont. Hope tht makes sense.
I could flush the engine coolant of my Gen III Prius (2013) without opening any panel at all. First I memorized the position of yellow knob of valve which was visible from top . Then there was a rectangular hole (aprx 6" x 3") in the sheet metal at bottom where I could put my arm and my hand could reach the valve at the estimated position (reach of others may depend upon the thickness/girth of their arm). With some effort I could open the valve by hand and most of drained coolant came out through another smaller hole in the sheet metal, though not very cleanly. Around 1% of coolant splashed and came out from a couple of other holes. In retrospect, I wish I would have drained slowly and had additional pans ready which may have reduced the mess. After draining I could close back the valve from the same hole at bottom.
Yep same here (2014 Gen3 Prius) @ 155K (first one I think - liquid looks good). If you ONLY have to drain the engine coolant (the inverter was replaced by Toyota so they changed that coolant), you don't need to remove the panel. Easy rolled on ramp, to reach in there and turn (if really slow it drips straight down, if faster it will splatter and will come out 2 holes further back in the cover as well. I cut a gallon milk jug to collect those secondary drips. used dr.prius app to put into maintenance mode and torque app rev to 2500rmp and heat coolant (89c stated boiling in overflow, no fan though). I used Zerex Asian pink for toyota. Same organic coolant at $11/g vs 33 at dealer a long drive away. easy peazy...
just like the engine one it has a limited life and could get dirty and is exposed to heat as well...looking at maintenance log p50 it shows [] replace engine/inverter coolant at 100k / 10y BUT inverter is 150k - with this side note: 3) Initial engine coolant replacement at 100,000 miles/120 months. Replace every 50,000 miles/60 months thereafter. Initial inverter coolant replacement at 150,000 miles/180 months. Replace every 50,000 miles/60 months thereafter. Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.
Why maintenance mode? The engine runs with the hybrid system on? Seems fun to control the computer with such an obscure button pedal mix! Thanks I will definitely plan to do this myself, slowly and carefully!
Maintenance mode bypasses the hybrid system. It’ll let you run the engine only so that the engine gets up to the proper temp for the thermostat to open up to finish bleeding the system from air bubbles.
First I want to thank you for this awesome video. My 2010 wouldn't pick up. Then I found your video. Now my car picks up, runs in the maintenance mode but for a few seconds and then shut back off. Please what else can I try? Thanks in advance.
I used an Airlift tool when I refilled the coolant. It eliminates the hassle of the bleeding process and speeds things up considerably. The third generation Prius has a very extensive cooling system. Air bubbles are real concern. I also squeezed the radiator hoses (from the bottom of radiator, to remove air bubbles) after the thermostat opened in the engine.
+farmerinchico you know, the funny thing is, it didn't take long for the engine to heat up and bleed all the air out of the system. It was much faster than my Honda Accord when I bleed it. We covered up the plastic under panel too early so we used the over flow hose by the coolant reservoir to check if it's hot enough, and sure enough, it was hot and a couple minutes later, the radiator fan kicked on. I think people make these hybrid vehicle maintenance out to be harder than it is, when it's really that easy.
Good info! Thanks. My 3rd gen Prius has no heat.🙁 coolant level is about 1/4” below the low marker. Car had been driven about an hour earlier. What to do?🤔
I have a great question for you. I have a 2014 toyota prius v and I have low heat after driving for 10-15 mins. I changed the thermostat and that only made a slight difference. I make sure my coolant level is to the top. Maybe is obvious but I do have a bad head gasket that doesn't mix with oil just burn coolant and the heat was working even with that issue present. I put the car into maintenance mode and left the car on reving to 2000 rpm for about 40 mins with the tank cap off and the heat on high and the car never gets hot even in full speed and max temp. I also squeeze the lines awhile it was on with the tank cap off. I changed the cap and still no heat. When the cooling fans kick in the hoses from the thermostat is hot and I measure the temperature of the two heater core hoses and they were the same temp 102c. I also flush the heater core before this and made no difference. After all of this is it possible there is still air in the cooling system? Is it may be that three way coolant valve that is causing the issue even tho I don't have the p0 code for it?
So to summarize when you want heat the car isn't blowing hot air? Does your car still blow cold air when you have the AC on? If yes then most likely the heater core is clogged up and if a flush didn't work it the core will need to be replaced. If the cold air isn't working either most likely the blower motor is out. A heater issue has nothing to do with the head gasket and the obd 2 system so you'll never get a code for it not working.
@@MrTmenzo Just a update in the matter. The AC system in the car isn't usable since the ac compressor was causing a high voltage leak which will turn on a hybrid code light so i just disconnected the compressor from the car, its still there and the lines but no com with the compressor since i disconnected from the wiring harness. It blows cold air when i have the heat on and after 20 minutes of driving it would get Luke warm but not warm. I found out that if leave the car in maintenance mode for 20 minutes than i get good heat. Don't worry i am not driving it with maintenance mode on because that will ruin the transaxle but if I wanted to take a nap that's what i did since i know i am not going to be driving it. Both the heater hoses are hot and i did flush it but honesty I don't think that its clogged since i eventually got great heat after being left in maintenance mode for a long time. Before that i replaced the thermostat twice and both times i found it closed which is the way it supposed to be because if I found it open that would be the cause of my problem. Most of the time having head gasket issues wouldn't effect the heat on cars but i found for some reason if you have a head gasket issue on a prius it will allow a lot of air to be mixed with the coolant so you would never get the heat you want. By leaving the car in maintenance mode or driving the car nonstop for 70 or more miles without a break any air that gets in the coolant would bleed out because of the temperature of the coolant would be so hot and the engine will stay on which would mean that the hoses and all will cause any repeated air coming in will just bleed out. I still have the prius now but i already have a 2000 lincoln continental with 105k in good shape so i am just waiting until i have the money for the registration and take it to a shop to get the inspection done. It's been a good run with the prius, i got it at 320,000 miles from a mechanic that my dad was great friends with but both him and my dad died of co-vid 19 not so long after. Right now it have 372,000 + with it misfiring from here to there and burning crazy amounts of oil even after replacing the pcv valve. I just put a heavier oil for more protection and that it last longer and i get a big hit on the mpg for that but for me it's better for the car to run with 21 mpg rather than having to check it everyday for oil and having 50 mpg but one day i forgot to check and the engine throws a rod. Thanks for trying to help out but unfortunately having a head gasket issue is a death sentence for the heat. After i tried everything i came to the conclusion and many people on the prius forums have come to that conclusion after all the crazy things they have tried to get their heat to work.
At what temperature does the thermostat open? Shouldn't there be a noticeable drop in coolant level when it does? I'm bleeding mine after replacing my water pump and refilling coolant and temps got up to 215 Fahrenheit without any drop in coolant level.
Thank you for the video. I took engine radiator out, but do not what screws/clips go where. Do you have any video or a diagram you can refer me to on the internet. Thanks !
It would be cool if you said why you did each process (maintenance mode, turn hybrid off,run heater) for us noobs ,also is it bad to just top off the coolant? Why is this overall process even necessary?
My 2014 prius almost at 120,000, and I'm planning to replace the water pump on the enging. Should I replace the thormostat as well? Have you ever had to replace them on your car?
These videos are fantastic..thank you so much! I am in a bit of a jam as I forgot the sequence and drained the fluid before removing the fill plug on a Gen3 Prius. The fill plug is now 100% stripped, rounded out even though I was using a 10mm allen plug...not sure how this could have happened. Anyway,, it is stripped and interested if you or anyone here encountered the same and, if so, how it was fixed? I am close to drilling out the plug however concerned of accidental damage to the threads and/or metal shavings inside the transmission case (and think even compressed air might not work given there is wet fluid liner inside.
@@NutzAboutBolts The top fill plug for transmission, for this video. The plug that is tucked behind the axel w/very little room to work. The 10mm allen socket plug went from looking like a square to now looking like a circle. Tried vice-grips on the outside, no luck and that chewed up the outside a bit....the plug continues to degrade.
Think there might be one shot left to create a dent (did this earlier w/effort of knocking it loose.) To confirm, 'in reverse' you are saying hammer the same direction to unscrew (counter clockwise?) No risk to damaging threads? As backup, is there any other way to fill the transmission (with a close measurement on volume?)
I understand that the engine will not run continuously when not in maintenance mode. The whole idea is to excrete all of the trapped air bubbles in the coolant system so the final fill point is achieved. Instead of putting the car in maintenance mode, wouldn't driving the car around for a couple of miles to run an errand, park the car, then check the coolant level to achieve the same results?
No, because the vehicle engine won’t be hot enough to bleed the air bubbles in the coolant system. The hybrid system cycles from the engine to the inverter to be fuel efficient, so it won’t be hot enough on short drives. Now for the longer freeway drives, I would guess it might work since it works on conventional vehicles, not sure about hybrids.
The fans kick on when the coolant temperature reaches 95°C, so if you have an OBD app or some other means of checking the temperature, you can watch your progress instead of just waiting.
@@bearsneaglesentertainment3901 what would cause it to get up to like 215 in maintenance mode while doing this process. It kept climbing up higher so I shut it off, but I’ve got new pump and thermostat no leaks fans came on just didn’t help to drop the temp
was it cool before? This doesnt affect the AC if that’s what you’re thinking. If your AC isn’t cooling, I’d check if the freon is low or leak in your AC system line.
Hello, great video! I have a question regarding the water pump, how many miles can you recommend to replace it? I have 170k miles I know it’s easy job but some people saids that if you get the light alert maybe it’s to late! Thanks in advance
mines is still running at 392K, but I did replace my first pump around 28k something was wrong with the oem water pump. I did replaced it with another OEM pump. I was looking at this video, on how to bleed the coolant, since I just cleaned out the EGR and EGR cooler. How ever my fan is not turning on, might need to run it till 20min.
@nutzaboutbolts I’m new to your channel but so far I love it. This is the only video I have questions on. Any clarification is appreciated. I tried seeing if anyone in the comments had the answer first but no luck. The questions are: At 1:52 after you’ve drained the original coolant and closed the valve by hand, how did the reservoir drain again? Did you open it up again off camera? At 3:16 to enter maintenance mode, do you push the power button twice WITH your foot on the brake or off? You also mention a maintenance mode and an inspection mode. Are they the same thing just a different name?
The reservoir uses vacuum to suck out all the fluids out from the reservoir due to the fluid being drained out of the radiator. Foot off the brakes when pressing the power button. Maintenance mode is for the engine to be on all the time without the hybrid system being on. Inspection mode is to use to flush the brake fluids by using the electric brake pump to flush out the rear brake calipers.
Yes, but it still needs to be changed to remove the salt build up from old coolant. The longer you go without a change the faster the coolant boils off and leaves behind even more salts
Confused why you don’t flush the system and you just drain and refill? I followed your video and my new coolant instantly started to turn dark like my old coolant I drained. I even poured distilled water in until all the dark coolant came out before adding the new coolant.
Thanks for you video! Do I need to lift the car to reach that drain valve? I have 2013 CT200h, is the same procedure as your 2012 Prius? I heard they are using same hybrid/power system. Thank you!
We jacked it up and put 4 jack stands under it since we were going to do the inverter coolant as well. Its better this way since you need to remove the undercover to get access to the inverter coolant. Also, both system needs to be changed out every 120k miles, so 2 birds 1 stone :)
U dont have to remove the bottom "plastic skid plate" because there is a wide mouthed rectangle on the drivers side. Just reach your hand through and find the petcock valve turn it lefty loosey and there ya go my friend!
Thanks for this great video. I followed all the steps except keeping the engine running in maintenance mode until fan comes up. It was fine in city driving but after like 10k kilometers I had to travel on highway, where while driving on constant high speed of like 110km/h for like a minute or so temperature warning light came up, and now it comes up on highways on above or higher speeds and the light goes off when I remove my foot from the pedal. I got the coolant from a Toyota dealership in town but he gave me Toyota pre diluted long life coolant, it was in red color not pink like yours and made in Thailand. My question is wether the above problem is because of (a) faulty coolant; (b) not removing possible air (though I did run my engine on maintenance mood but not long enough for fan to come up), or (c) my water pump not in perfect shape (and how to check water pump's performance).
Its possible that you didn't bleed the air in the system. I would recommend redoing the procedure, and use the 50/50 pink coolant. The red coolant is a different additive for older Toyota vehicles. You need the 50/50 pink coolant and redo this procedure and make sure to wait for the radiator fan to come on. Good luck.
Is there any difference between bleeding in maintenance mode vrs just letting it run with the heater on ?aside from wasted time when the engine kicks off?
If you don’t run it in maintenance mode, your engine won’t be on, it’ll be the hybrid system on. If you run in maintenance mode, the engine will be running the whole time so it’ll circulate the coolant throughout the engine and warm it up.
Appreciate your awesome videos, NAB! Ever done a Gen 3 prius thermostat replacement? I heard it's just 3 nuts where 2 is easy and the 3rd one is hidden in the back (hard to get to). The hard to get to last nut.... is that a nut or is it a bolt? What socket to remove last 'hard to get to one' . Thank you
hi nice video thanks for help I m having issue with hot air it's not coming out of vent and it's engine getting hot as well from the time I have changed radiotor looks like air blocked what should I do
Your video is awesome. I have a Prius 2013. Do I have to drain the coolant on 60K maintenance? Or is it good enough to refill the coolant only? Thanks!
Thanks for sharing. Did it exactly following your procedures but in the last step to put the engine in service mode did not see much coolant going down the funnel. The fan just won't come on since it's freezing code today when I did it. Any thoughts on if I need to do anything else to bleed air out? Thanks!
+Yi Ni like we said in the video, when you're in maintenance mode, you're not suppose to be driving since all of the system is off or disable. Just run the engine until the radiator fan comes on. Check the overflow hose that goes to the reservoir until its hot as well. Eventually your radiator fan will come on, you can notice that our coolant starts bubbling because the system is hot and a couple minutes later, the fan will come on.
ANY HELP IS APPRECIATED! Can't figure out why I have no hot air. Changed blown head gasket, changed water pump and thermostat, and still no heat. Bread the system for 45 min to get no bubbles in a raised funnel. If I wait for 30 min, the cabin heat warms up to hot, but as soon as I hit the A/C on button, it starts blowing cold air again. (Room temp).
Hi, Thanks for the nice video. I have 2014 Prius V (3,30,000 KM). It keeps on blowing cold air in the morning when it is cold outside even after the coolant temp is 85C. Also electric water pump stays at 6375 rpm. However if I restart the engine then pump runs at 2975 rpm and it blows hot air with no problem afterwards. Recently I got the error code P148F (Engine coolant pump over revolution) which I cleared. I have already replaced the thermostat but I think the old one was also good. Please advice if I need to replace the water pump? I appreciate your help. Thank you!
There’s a Facebook group called Prius Nation, I think someone was asking something similar to coolant, you can join and ask them. they should be able to help you with your answer
@@NutzAboutBolts Appreciate the quick reply. To ease my anxiety, I think my prius C 2014 is low on engine coolant which is generating a check engine light. I notice two places where I can add coolant. One reservoir looks like the one in the video but I see another one on top of what I think are radiator fans. If I add coolant to either inputs, would I need to worry about pushing the air out of the system? Thanks so much for your time.
@@bch6707 from the looks of it, I see your inverter has a reservoir but I don’t see your engine coolant has one. In that case, you can remove the radiator cap and use a spill free funnel to add coolant from top.
@@NutzAboutBolts Thanks a lot for the follow up. Last set of questions I had was that I only noticed the coolant was low from not seeing any pink in the "expansion tank" that's closed by a black cap labeled coolant. It sits next to the radiator cap. Should I not ever being filling that up? And how would I know if I added enough coolant to the radiator?
Thanks for the video, but I am confused about one thing. Near the end, after you have run the engine for a while in maintenance mode, you installed the caps back to the coolant reservoir - and then you ran the heater. I thought running the heater is part of the air bleeding process? Thus, shouldn't you still keep the cap off the coolant reservoir when you run the heater - and then finally install the cap at the very very end of everything?
@@NutzAboutBolts yeah, at 173K now and it was drained and refilled at a shop at around 130K. Been getting an intermittent overheat symbol lately and I am thinking it is because of air in the coolant system (at least I hope it's just that!)
Hello! Thanks for the video. I have a prius 05 and change my first time coolant system. After done, I noticed a water flowing from the passenger cabin I don't know why. Could you please explain to me how to fix it? I really appreciate from your time.
Cylinder(s) misfiring. Do you have a check engine light? If so, go to your local auto parts store and ask for them to put on a code reader (if you don't own one).
@@troybonner91 the driving noise is a loud knocking when im driving at a lower speed. Imagine a lawnmower, that's how it is. Toyota told me its the engine
@@dessalinesx5091 I assume you came here because your losing coolant and if your engine is knocking as well, most likely have a leaking headgasket. About 1100 cost of job.
I'm worried that the Gen 3 Prius (2010) I just purchased has a head gasket leak. I performed the EGR pipe, cooler cleaning along with the intake manifold and i still get the periodic engine shake at start up. I have a OBDII scanner showing a p0301. Which could be a blown head gasket? I just recently replaced the spark plugs with Bosch Iridiums. Question, can you perform a block chemical test on the prius via the coolant reservoir? This should be a sure fire way to tell of it's a blown head gasket? I would assume so but you guys seem well versed in Prius and your videos, btw, are super helpful.
Ricardo Santiago, what was the issue? Blown head gasket? Can you preform that test? I have 2014, milky dip stick, cold start knocking, low coolant ( no sign of leaking on ground). No check engine light.
@@terrytorres7075 I did perform the test using the coolant reservoir and it was inconclusive. I didn't have the milky dipstick, but think for sure it was the head gasket in cylinder one. My fix was simple, a $12 bottle of K-seal into coolant reservoir and almost 8K miles later, no shakes and no coolant loss. Disclaimer, these block sealers don't work 100% of the time, in my case it did and I believe I was just lucky. I know I'm on borrowed time but until then 258,000 miles and counting.
The awful banging sound you hear is a piston preparing to slam its way through the side of your engine block. It is now dead. New engine is now required
@@metrork1 Maybe you're right but not the destiny of my little Prius. A bottle of Kseal seems to have fixed my issue. 8K miles later the Prius continues to rock along. I have been making trips to and from West Palm Beach and Sarasota and averaging 40 mpg at 70-75 mph. Amazing machine. Granted, I know the engine can go at any time and I'm ready for that till then...
Hi, I took my car to the dealer to have the radiator coolant replace and I don't know if they knew how to put the car on maintenance mode anyways after that my car over heats going over 45 MPH I think they didn't bleed out the air by putting the car on maintenance mode and that could be making it over heat. what do you guys think?
Maintenance mode: power button twice, gas fully twice, brake once (hold), neutral, twice gas, park, twice more gas pedal
How to turn off this mode ?
@@Doinformowany Turn engine off with start button and it will revert back to normal
Nice cheat code
up, up, down, down, left, right, left, right, B, A and Start
Will this give my engine infinite lives or any special powers?
Super helpful.
Anyone else think the Maintenance Mode process feels like a video game cheat code?
Thought my Prius was going to start floating or something
🤣🤣 up up down down left right left right A, B, Start
I probably will have to do this soon. But I would like to personally tell you, I appreciate you. I have saved money and learned about my car in the process. Thank you kind sir - you have helped a woman not get scammed by these dealers!
No problem! Glad the videos were helpful and helped saved you lots of $$$ 🙂
This channel is such a hidden gem! 💎 Thank you for sharing your expertise in such a beginner-friendly way!
Great video and instructions for engine coolant and inverter coolant replacement. Based on dealer quote, this saved me $550.
I was about to take it to them i will do it myself 😂
NOT great. He did not mention the bleeding valve under the cowl panel that is required by the factory manual. And these 3rd gen cars are prone to engine overheat.
U5aa5,д5дгчTY k KY just uju😂@@alexisrodriguez2966
@@AnnaA-fq8ywas I understand it, they found that the bleed valve was unnecessary with the pressurized system, so Toyota eliminated it during the Gen 3 run.
Using a trim removal tool, gently wiggle out the plastic pins that hold the splash shield so you don’t break them. Reinstall them in same location. Have spare plastic pins ready. You want that shield just like it came from the factory.
Thanks for helping me diagnose this. I’m headed Valvoline but I didn’t know where to turn before. Thanks.
Man that was way easy to change out the fluid. Great Video sir, keep it up.
Thanks!
There's a vent valve on the heater return pipe on the transmission side of the engine,open that to get the air out quicker
It’s only on 2010-2011 models
There are access holes for both the drain nozzle and the tap. No need to take anything off underneath.
We were filming the inverter coolant drain and refill video as well, so that’s why the undercarriage panel was off. But yes, you don’t need to remove the panel since there is a hole for the radiator peck cock from the buttom.
Thank you for the video, it helped me so much to do the coolant change and to do the whole process again when I had to replace the water pump. Maybe next time you can add the video about that too, even though is actually not bad to do. Only 2 hours tops.
for sure when ours go bad, its electric water pump, so it shouldn't go out on you...
i'm going thru changing the water pump and thermostat now. if someone doesn't want to remember all those steps for maintenance mode you can just place an item on the accelerator pedal and the car will start and stay running. if you want or need to get to 2500-2700 rpm you can place an item heavy enough to get the pedal to get to those rpm's. bleeding air out of this car was more of a challenge then i thought it would be. had to compress the inlet hose(at the t/stat) many times to prime the pump. good video. thanks.
How do I bleed the air out? I can't get the coolant system to fill? Is my t/stat not opening? Or am I not doing something right?
Put a piece of vinyl tubing on the radiator drain petcock, and run it into a jug/container. No splashing!
thx man. I just bought a hybrid prius and didn't know how to work these new cars. thx for the help and I'll share this with everyone I know
thank you, we appreciate that :) You can also check out PriusChat forum as well, they are pretty helpful in questions in case you have any problems with your vehicle. :)
thx will do
Man, you and this video are pure life savers. This is exactly what I needed. Thank you very much. New subscriber
Glad it helped 👍🏼
@@NutzAboutBolts how long does it take for the fan to come on. it's around 50 degrees outside where I am
@@Juss-Saiyan if you idle it, it’s usually longer than 30 mins. If you keep it at 2k rpm, it’ll probably turn on between 15 mins to 25mins.
@@NutzAboutBolts the fans started kicking on and off so I guess it worked. I have hot air, but what's strange is I'm use to seeing a lot more movement in the water when it kicks on. Also weirdly enough I had it at exactly full and now it's like an inch over full..? That's a first as well
If you turn your heater on "full blast" the gasoline engine will keep running until the engine warms up and cooling fans energize and the heating t-stat opens up. I don't think there's any need for the elaborate "maintenance mode" ordeal.
you can also get dr.prius mobile app and use the free tool to go into service mode.
That's I'm thinking
Thank you for your video i use this videos for change the spark plugs, transmission oil and the water pump and coolant
You put the cap back on before running the heater? Wouldn't that keep more air bubbles from coming out?
My thoughts exactly
@@mattgreen4611 I think the coolant runs through the heater core whether you have the heater on or off. It's like a little radiator inside the duct work or heat and air assembly.
I now know the cheat code to my car. Thank you.
Great video. Broke down to step by step.
If anybody is watching this video just know this process is incorrect! You will be fine if you stick with the same coolant more than likely, but just realize since he didn't drain the cylinder block drain cock plug most of the coolant is still in! Don't accidentally mix it if you're trying to swap colors! Coolant capacity is about 5 more quarts than he was able to get out just draining the radiator and leaving the coolant in the engine!
How do you flush the engine
@@stn7172 pull a line on the exhaust heat exchange and let it drain. For filling you use the burp port near the dash.Just open it though. You fill up to the burp line on the coolant tank.
Makes sense why I did this and my new coolant instantly turned dark like the old stuff I drained
@paladain55 to clarify I have to fill the coolant reservoir up to the burp fill line in order to open up the burp port? I am having issues with filling my coolant system up.
@@JuanPablo-kt4uh Easiest method is to drain the coolant line going to the exhaust portion and the radiator. When it finishes, fill from the bleed port on the top of the engine near the firewall, and finish up with the coolant resevoir. Theres a hump in the system at the engine block so one side will drain and one wont. Hope tht makes sense.
I tried to do the maintenance mode, but instead it unlocked beast mode and now my Prius has 800hp! 😳
🤣😂🤣
😂😂😂😂😂
Thank you for this video. It really helped!
I could flush the engine coolant of my Gen III Prius (2013) without opening any panel at all. First I memorized the position of yellow knob of valve which was visible from top . Then there was a rectangular hole (aprx 6" x 3") in the sheet metal at bottom where I could put my arm and my hand could reach the valve at the estimated position (reach of others may depend upon the thickness/girth of their arm). With some effort I could open the valve by hand and most of drained coolant came out through another smaller hole in the sheet metal, though not very cleanly. Around 1% of coolant splashed and came out from a couple of other holes. In retrospect, I wish I would have drained slowly and had additional pans ready which may have reduced the mess. After draining I could close back the valve from the same hole at bottom.
Yep same here (2014 Gen3 Prius) @ 155K (first one I think - liquid looks good). If you ONLY have to drain the engine coolant (the inverter was replaced by Toyota so they changed that coolant), you don't need to remove the panel. Easy rolled on ramp, to reach in there and turn (if really slow it drips straight down, if faster it will splatter and will come out 2 holes further back in the cover as well. I cut a gallon milk jug to collect those secondary drips. used dr.prius app to put into maintenance mode and torque app rev to 2500rmp and heat coolant (89c stated boiling in overflow, no fan though).
I used Zerex Asian pink for toyota. Same organic coolant at $11/g vs 33 at dealer a long drive away. easy peazy...
@@alaind831 I have same 2014 Prius. We have to change inverter coolant???
just like the engine one it has a limited life and could get dirty and is exposed to heat as well...looking at maintenance log p50 it shows [] replace engine/inverter coolant at 100k / 10y BUT inverter is 150k - with this side note:
3) Initial engine coolant replacement at 100,000 miles/120 months. Replace every 50,000 miles/60 months thereafter.
Initial inverter coolant replacement at 150,000 miles/180 months. Replace every 50,000 miles/60 months thereafter.
Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for
more information.
@@alaind831 what guide sir?
@@terrytorres7075 "maintenance log page 50" as stated above
Why maintenance mode? The engine runs with the hybrid system on? Seems fun to control the computer with such an obscure button pedal mix! Thanks I will definitely plan to do this myself, slowly and carefully!
Maintenance mode bypasses the hybrid system. It’ll let you run the engine only so that the engine gets up to the proper temp for the thermostat to open up to finish bleeding the system from air bubbles.
First I want to thank you for this awesome video. My 2010 wouldn't pick up. Then I found your video. Now my car picks up, runs in the maintenance mode but for a few seconds and then shut back off. Please what else can I try? Thanks in advance.
Excellent video. The explanation was very good !!
Great Prius maintenance video!
Absolutely what I needed, thanks 🙏
I used an Airlift tool when I refilled the coolant. It eliminates the hassle of the bleeding process and speeds things up considerably. The third generation Prius has a very extensive cooling system. Air bubbles are real concern. I also squeezed the radiator hoses (from the bottom of radiator, to remove air bubbles) after the thermostat opened in the engine.
+farmerinchico you know, the funny thing is, it didn't take long for the engine to heat up and bleed all the air out of the system. It was much faster than my Honda Accord when I bleed it. We covered up the plastic under panel too early so we used the over flow hose by the coolant reservoir to check if it's hot enough, and sure enough, it was hot and a couple minutes later, the radiator fan kicked on. I think people make these hybrid vehicle maintenance out to be harder than it is, when it's really that easy.
+NutzAboutBolts It's all those noises a Prius makes as it just sitting in the garage: )
+farmerinchico I know what you mean lol!! Darn Prius noise.
+NutzAboutBolts
you didn't flush the system
21boxhead
that's why its called a drain and refill...
great videos man. quick and easy and great quality!
+Jesse Ramirez thanks!
I find that just run the heat on HI will make the engine run. you can also hit the gas. that fluid looked new. LOL
Looks can be deceiving on coolant. You can use a test strip on it to see if it is still good
Thank you for the helpful video!
You’re welcome
Thank you so much for those information sir that gain our knowledge thanks and awesome
Great video per usual.
+Mr. Buttermaker thanks
was not easy to drive it for few minutes till the sensor opens and stop and refill until your coolant level has stop? good video.
Спасибо.
helpful video for "maintenance mode."
You mentioned maintenance mode and inspection mode
Thanks again for the great videos!!!!
np :)
@@NutzAboutBolts hey is this the same coolant you use for the inverter coolant change and what is it called exactly the coolant ?
You're talented
Good info! Thanks. My 3rd gen Prius has no heat.🙁 coolant level is about 1/4” below the low marker. Car had been driven about an hour earlier. What to do?🤔
Did you follow the procedure? Why’s it below the low mark?
Is this supposed to be done at 100k miles?
Per Toyota yes
I have a great question for you. I have a 2014 toyota prius v and I have low heat after driving for 10-15 mins. I changed the thermostat and that only made a slight difference. I make sure my coolant level is to the top. Maybe is obvious but I do have a bad head gasket that doesn't mix with oil just burn coolant and the heat was working even with that issue present. I put the car into maintenance mode and left the car on reving to 2000 rpm for about 40 mins with the tank cap off and the heat on high and the car never gets hot even in full speed and max temp. I also squeeze the lines awhile it was on with the tank cap off. I changed the cap and still no heat. When the cooling fans kick in the hoses from the thermostat is hot and I measure the temperature of the two heater core hoses and they were the same temp 102c. I also flush the heater core before this and made no difference. After all of this is it possible there is still air in the cooling system? Is it may be that three way coolant valve that is causing the issue even tho I don't have the p0 code for it?
So to summarize when you want heat the car isn't blowing hot air? Does your car still blow cold air when you have the AC on? If yes then most likely the heater core is clogged up and if a flush didn't work it the core will need to be replaced. If the cold air isn't working either most likely the blower motor is out. A heater issue has nothing to do with the head gasket and the obd 2 system so you'll never get a code for it not working.
@@MrTmenzo Just a update in the matter. The AC system in the car isn't usable since the ac compressor was causing a high voltage leak which will turn on a hybrid code light so i just disconnected the compressor from the car, its still there and the lines but no com with the compressor since i disconnected from the wiring harness. It blows cold air when i have the heat on and after 20 minutes of driving it would get Luke warm but not warm. I found out that if leave the car in maintenance mode for 20 minutes than i get good heat. Don't worry i am not driving it with maintenance mode on because that will ruin the transaxle but if I wanted to take a nap that's what i did since i know i am not going to be driving it. Both the heater hoses are hot and i did flush it but honesty I don't think that its clogged since i eventually got great heat after being left in maintenance mode for a long time. Before that i replaced the thermostat twice and both times i found it closed which is the way it supposed to be because if I found it open that would be the cause of my problem. Most of the time having head gasket issues wouldn't effect the heat on cars but i found for some reason if you have a head gasket issue on a prius it will allow a lot of air to be mixed with the coolant so you would never get the heat you want. By leaving the car in maintenance mode or driving the car nonstop for 70 or more miles without a break any air that gets in the coolant would bleed out because of the temperature of the coolant would be so hot and the engine will stay on which would mean that the hoses and all will cause any repeated air coming in will just bleed out. I still have the prius now but i already have a 2000 lincoln continental with 105k in good shape so i am just waiting until i have the money for the registration and take it to a shop to get the inspection done. It's been a good run with the prius, i got it at 320,000 miles from a mechanic that my dad was great friends with but both him and my dad died of co-vid 19 not so long after. Right now it have 372,000 + with it misfiring from here to there and burning crazy amounts of oil even after replacing the pcv valve. I just put a heavier oil for more protection and that it last longer and i get a big hit on the mpg for that but for me it's better for the car to run with 21 mpg rather than having to check it everyday for oil and having 50 mpg but one day i forgot to check and the engine throws a rod. Thanks for trying to help out but unfortunately having a head gasket issue is a death sentence for the heat. After i tried everything i came to the conclusion and many people on the prius forums have come to that conclusion after all the crazy things they have tried to get their heat to work.
At what temperature does the thermostat open? Shouldn't there be a noticeable drop in coolant level when it does? I'm bleeding mine after replacing my water pump and refilling coolant and temps got up to 215 Fahrenheit without any drop in coolant level.
Did you also replace the thermostat?
How did you fix the issue?
30 minutes and my coolant read at 203 F and fan still did not come on 😢. Any advice? It’s about 60F outside
Update?
Also, how do you know collant temp?
Thank you for the video. I took engine radiator out, but do not what screws/clips go where. Do you have any video or a diagram you can refer me to on the internet. Thanks !
Thanks for this video places want like 230 bucks to flush and replace.
Yeah they’re pretty pricey
How about air bleeding the system?
It would be cool if you said why you did each process (maintenance mode, turn hybrid off,run heater) for us noobs ,also is it bad to just top off the coolant? Why is this overall process even necessary?
My 2014 prius almost at 120,000, and I'm planning to replace the water pump on the enging. Should I replace the thormostat as well? Have you ever had to replace them on your car?
These videos are fantastic..thank you so much!
I am in a bit of a jam as I forgot the sequence and drained the fluid before removing the fill plug on a Gen3 Prius. The fill plug is now 100% stripped, rounded out even though I was using a 10mm allen plug...not sure how this could have happened. Anyway,, it is stripped and interested if you or anyone here encountered the same and, if so, how it was fixed? I am close to drilling out the plug however concerned of accidental damage to the threads and/or metal shavings inside the transmission case (and think even compressed air might not work given there is wet fluid liner inside.
Which fill plugs stripped? For the transmission?
@@NutzAboutBolts The top fill plug for transmission, for this video. The plug that is tucked behind the axel w/very little room to work. The 10mm allen socket plug went from looking like a square to now looking like a circle. Tried vice-grips on the outside, no luck and that chewed up the outside a bit....the plug continues to degrade.
@@PixelRogue3 try using a flat head screw driver or something sharp to create a dent, and use a hammer and hammer the bolt in reverse to twist it out.
Think there might be one shot left to create a dent (did this earlier w/effort of knocking it loose.) To confirm, 'in reverse' you are saying hammer the same direction to unscrew (counter clockwise?) No risk to damaging threads?
As backup, is there any other way to fill the transmission (with a close measurement on volume?)
UPDATE: Used a chisel to create an indentation, then screw driver and once it had a grip it spun out as if it were brand new! Happy days. Thank you!
You forgot to mention you have to turn on A/C to turn on the cooling fans!
You don't turn the AC on, the cooling fan turns on once the engine is up to temperature. If you turn the AC on the fan runs nonstop.
I understand that the engine will not run continuously when not in maintenance mode. The whole idea is to excrete all of the trapped air bubbles in the coolant system so the final fill point is achieved. Instead of putting the car in maintenance mode, wouldn't driving the car around for a couple of miles to run an errand, park the car, then check the coolant level to achieve the same results?
No, because the vehicle engine won’t be hot enough to bleed the air bubbles in the coolant system. The hybrid system cycles from the engine to the inverter to be fuel efficient, so it won’t be hot enough on short drives. Now for the longer freeway drives, I would guess it might work since it works on conventional vehicles, not sure about hybrids.
What about driving. In power mode in highway.
Hi, how long does it take until the cooling fans turn on during maintenance mode?
45 mins of you leave it idle, but if you rev it up like we do to about 2-3k rpm, then it takes around 15-20 mins.
@@NutzAboutBolts 3
The fans kick on when the coolant temperature reaches 95°C, so if you have an OBD app or some other means of checking the temperature, you can watch your progress instead of just waiting.
@@bearsneaglesentertainment3901 what would cause it to get up to like 215 in maintenance mode while doing this process. It kept climbing up higher so I shut it off, but I’ve got new pump and thermostat no leaks fans came on just didn’t help to drop the temp
@mattbrooks9928 did you find a fix?
Thanks I did as you said but my ac is not cooling any idea what happened.?
was it cool before? This doesnt affect the AC if that’s what you’re thinking. If your AC isn’t cooling, I’d check if the freon is low or leak in your AC system line.
Can you write the steps on bringing the car in the maintenance mode please and how to bring it back to hybrid mode before driving it. Thanks
Romeo maloco any response?
YES I did put out there how do you get into maintennae mode? I know how to get out of it by simply shutting the engine off.
Hello, great video! I have a question regarding the water pump, how many miles can you recommend to replace it? I have 170k miles
I know it’s easy job but some people saids that if you get the light alert maybe it’s to late!
Thanks in advance
Mines still running at 240k miles. I’d change it when it alerts me lol
mines is still running at 392K, but I did replace my first pump around 28k something was wrong with the oem water pump. I did replaced it with another OEM pump. I was looking at this video, on how to bleed the coolant, since I just cleaned out the EGR and EGR cooler. How ever my fan is not turning on, might need to run it till 20min.
@nutzaboutbolts I’m new to your channel but so far I love it. This is the only video I have questions on. Any clarification is appreciated. I tried seeing if anyone in the comments had the answer first but no luck.
The questions are:
At 1:52 after you’ve drained the original coolant and closed the valve by hand, how did the reservoir drain again? Did you open it up again off camera?
At 3:16 to enter maintenance mode, do you push the power button twice WITH your foot on the brake or off?
You also mention a maintenance mode and an inspection mode. Are they the same thing just a different name?
The reservoir uses vacuum to suck out all the fluids out from the reservoir due to the fluid being drained out of the radiator.
Foot off the brakes when pressing the power button.
Maintenance mode is for the engine to be on all the time without the hybrid system being on.
Inspection mode is to use to flush the brake fluids by using the electric brake pump to flush out the rear brake calipers.
@@NutzAboutBolts so even when we close the valve at the bottom, it will still continue to drain when it’s filled up again?
@@Jeremy-vz9gr no, as long as the petcock is open, it’ll keep draining out the coolant.
what if it's low? can you simply add more coolant?
Yes, but it still needs to be changed to remove the salt build up from old coolant. The longer you go without a change the faster the coolant boils off and leaves behind even more salts
For a Prius Hybrid, you did not also drain the inverter, which should have a drain plug under the car?
We did another video for it
Confused why you don’t flush the system and you just drain and refill? I followed your video and my new coolant instantly started to turn dark like my old coolant I drained. I even poured distilled water in until all the dark coolant came out before adding the new coolant.
Does it have coolant level sensor?i forget to hook overflow line and was driving a week without warning
Thank you very much. So well done!
I have a 2015 Prius and it looks like there is a 2nd coolant reservoir on the drivers side. It’s pink in color as well. What is that!?
It is for the converter only, not the engine, although it takes the same type of antifreeze
Thanks for you video! Do I need to lift the car to reach that drain valve? I have 2013 CT200h, is the same procedure as your 2012 Prius? I heard they are using same hybrid/power system. Thank you!
We jacked it up and put 4 jack stands under it since we were going to do the inverter coolant as well. Its better this way since you need to remove the undercover to get access to the inverter coolant. Also, both system needs to be changed out every 120k miles, so 2 birds 1 stone :)
Thanks! If I only replace the engine coolant at this time, do I need to buy two gallon coolant? or just one gallon is fine? @@NutzAboutBolts
@@jasonkung2861get 2
Would be cool if you actually had the instructions on how to remove the cover in this video
U dont have to remove the bottom "plastic skid plate" because there is a wide mouthed rectangle on the drivers side. Just reach your hand through and find the petcock valve turn it lefty loosey and there ya go my friend!
Is there not, an engine block drain plug, also? All the coolant you are getting, is out of the radiator bottom?
Thanks for this great video.
I followed all the steps except keeping the engine running in maintenance mode until fan comes up.
It was fine in city driving but after like 10k kilometers I had to travel on highway, where while driving on constant high speed of like 110km/h for like a minute or so temperature warning light came up, and now it comes up on highways on above or higher speeds and the light goes off when I remove my foot from the pedal.
I got the coolant from a Toyota dealership in town but he gave me Toyota pre diluted long life coolant, it was in red color not pink like yours and made in Thailand.
My question is wether the above problem is because of (a) faulty coolant; (b) not removing possible air (though I did run my engine on maintenance mood but not long enough for fan to come up), or (c) my water pump not in perfect shape (and how to check water pump's performance).
Its possible that you didn't bleed the air in the system. I would recommend redoing the procedure, and use the 50/50 pink coolant. The red coolant is a different additive for older Toyota vehicles. You need the 50/50 pink coolant and redo this procedure and make sure to wait for the radiator fan to come on. Good luck.
@@NutzAboutBolts x
Haseeb Ahmed did you find out what it was
Did you figure out what was wrong with it? I'm having similar issues, thanks!
What's up Haseeb...??? Did you ever get to the bottom of this ???
How much coolant should I buy if I'm going to do the inverter and the engine at the same time?
2 gallons.
Thanks!
does the method of getting into maintenance mode apply to Lexus CT200H as well? (same 1.8L engine)
To anyone else reading this now, the answer is yes
@@hiwrenhere thank you, a bit late (3 yrs old) , but I guess it beats never
Tha kool for video . I have a 2017 Prius two. I’ve driven 35k mikes . When should I change my coolant liquid?
Dealer says Toyota coolant good for 100k it's long life coolant, but good idea to do it at 80k
Is there any difference between bleeding in maintenance mode vrs just letting it run with the heater on ?aside from wasted time when the engine kicks off?
If you don’t run it in maintenance mode, your engine won’t be on, it’ll be the hybrid system on. If you run in maintenance mode, the engine will be running the whole time so it’ll circulate the coolant throughout the engine and warm it up.
The link for the antifreeze is no good. Please update it.
thanks! I just update it.
what are your thoughts on vacuum filling coolant method❔
Never tried it… how long is the process?
how does it good to inspection mode do I wait
Appreciate your awesome videos, NAB! Ever done a Gen 3 prius thermostat replacement? I heard it's just 3 nuts where 2 is easy and the 3rd one is hidden in the back (hard to get to). The hard to get to last nut.... is that a nut or is it a bolt? What socket to remove last 'hard to get to one' . Thank you
The hidden third one is a bolt and you can take it with 10 mm
@@kumara5492 Much appreciation, K.A
@@kumara5492 Appreciation, brother
hi nice video thanks for help I m having issue with hot air it's not coming out of vent and it's engine getting hot as well from the time I have changed radiotor looks like air blocked what should I do
whats the history of the vehicle? suddenly it just doesn't blow hot air?
khurram manzoor shahid might be thermostat.
Your video is awesome. I have a Prius 2013. Do I have to drain the coolant on 60K maintenance? Or is it good enough to refill the coolant only? Thanks!
Refill till 110-120k miles
VERY INFORMATIVE THANK YOU
Thanks for sharing. Did it exactly following your procedures but in the last step to put the engine in service mode did not see much coolant going down the funnel. The fan just won't come on since it's freezing code today when I did it. Any thoughts on if I need to do anything else to bleed air out? Thanks!
+Yi Ni like we said in the video, when you're in maintenance mode, you're not suppose to be driving since all of the system is off or disable. Just run the engine until the radiator fan comes on. Check the overflow hose that goes to the reservoir until its hot as well. Eventually your radiator fan will come on, you can notice that our coolant starts bubbling because the system is hot and a couple minutes later, the fan will come on.
@@NutzAboutBolts how do you put into maintenance mode? Another reader explained how to get out of it by shutting the engine off.
@@harsep we showed that step in the beginning of the video
At 316 they go thru steps for maintenance mode. Then turning on ready mode (idling) to cycle cooling system.
ANY HELP IS APPRECIATED!
Can't figure out why I have no hot air. Changed blown head gasket, changed water pump and thermostat, and still no heat. Bread the system for 45 min to get no bubbles in a raised funnel. If I wait for 30 min, the cabin heat warms up to hot, but as soon as I hit the A/C on button, it starts blowing cold air again. (Room temp).
If you turn on the a/c, it’s not going to blow hot air, it’ll blow cold air
@@NutzAboutBolts that's not how it works. A/C should blow hot air if the temp is set to max. I have 2 prius, and the other one works fine.
Hi, Thanks for the nice video. I have 2014 Prius V (3,30,000 KM). It keeps on blowing cold air in the morning when it is cold outside even after the coolant temp is 85C. Also electric water pump stays at 6375 rpm. However if I restart the engine then pump runs at 2975 rpm and it blows hot air with no problem afterwards. Recently I got the error code P148F (Engine coolant pump over revolution) which I cleared. I have already replaced the thermostat but I think the old one was also good. Please advice if I need to replace the water pump? I appreciate your help. Thank you!
There’s a Facebook group called Prius Nation, I think someone was asking something similar to coolant, you can join and ask them. they should be able to help you with your answer
Hi NutzAboutBolts, thanks for sharing this video. Do I need to run things in Maintenance mode if I'm just adding to a system low on coolant?
Nope
@@NutzAboutBolts Appreciate the quick reply. To ease my anxiety, I think my prius C 2014 is low on engine coolant which is generating a check engine light. I notice two places where I can add coolant. One reservoir looks like the one in the video but I see another one on top of what I think are radiator fans. If I add coolant to either inputs, would I need to worry about pushing the air out of the system? Thanks so much for your time.
@@bch6707 from the looks of it, I see your inverter has a reservoir but I don’t see your engine coolant has one. In that case, you can remove the radiator cap and use a spill free funnel to add coolant from top.
@@NutzAboutBolts Thanks a lot for the follow up. Last set of questions I had was that I only noticed the coolant was low from not seeing any pink in the "expansion tank" that's closed by a black cap labeled coolant. It sits next to the radiator cap. Should I not ever being filling that up? And how would I know if I added enough coolant to the radiator?
@@bch6707 There should be a full and low hash mark on the coolant reservoir to tell if it needs refilling or not.
Great Video but you didn't show how to get out of maintenance mode.
You didn’t watch the video long enough to see it. Go to 3:14
Could i use a hand pump to suck out the coolant from reservoir so i dont have to take off the under pumper?
Let gravity do the job, it’s easier, and hand pump won’t suck everything out of the engine block...
Thanks for the video, but I am confused about one thing. Near the end, after you have run the engine for a while in maintenance mode, you installed the caps back to the coolant reservoir - and then you ran the heater. I thought running the heater is part of the air bleeding process? Thus, shouldn't you still keep the cap off the coolant reservoir when you run the heater - and then finally install the cap at the very very end of everything?
Once the fan turns on, the system is free from air pockets in the coolant system. You can still run the heater after and it won’t be an issue.
@@NutzAboutBolts OK great - thanks for the quick reply! I'm in my driveway leading the air out of the coolant system now as we speak!
@@generaljohnsonnice! I did my coolant drain and refill twice already. It’s 250k miles
@@NutzAboutBolts yeah, at 173K now and it was drained and refilled at a shop at around 130K. Been getting an intermittent overheat symbol lately and I am thinking it is because of air in the coolant system (at least I hope it's just that!)
@@generaljohnson Hrm, never had that issue before. Let me know if there’s a check engine light
great video, so once the air is gone just turn the car off and that should get it out of maintenance mode?
Yes sir
Yes sir
How much coolant did you use?
Perfect. Thanks
How does the air in your heater core bleed out if you already put the pressure cap on?
The radiator fan turned on, there’s no air in the system.
Hello! Thanks for the video. I have a prius 05 and change my first time coolant system. After done, I noticed a water flowing from the passenger cabin I don't know why. Could you please explain to me how to fix it? I really appreciate from your time.
Sovann HEAN it’s possible it could be from the AC drainage hose...
@@NutzAboutBolts I have checked there is no leak on the floor mat. But it just a sound of water movement that I noticed. Is it cause by AC?
Sovann HEAN that’s probably the coolant flowing through the evaporator behind the passenger dashboard. You’re fine.
@@NutzAboutBolts Thank you so much!
Is this the only coolant that needs replacement? Or are there other coolant circuits?
One for the engine and one for the inverter
instead of maintenance mode why not just drive it around the block? it probably going to take 20min for fans to kick in
while on idle
+21boxhead because if you don't put it in maintenance mode, the hybrid system kicks in which the engine won't be turned on 100% of the time.
and why is that bad?
Can you put a 2011 Prius into maintenance mode if you don't have a screen?
You’ll need the dash screen to see if it’s set in maintenance mode or not
@@NutzAboutBolts don't have MFD. But obviously don't need to put it into maintenance mode in order to change the inverter fluid.
2010 prius is making a knocking noise when driving. Any way to fix that issue? Thanks for this video. Im going to change the coolant in my car today
Cylinder(s) misfiring. Do you have a check engine light? If so, go to your local auto parts store and ask for them to put on a code reader (if you don't own one).
@@troybonner91 the driving noise is a loud knocking when im driving at a lower speed. Imagine a lawnmower, that's how it is. Toyota told me its the engine
@@dessalinesx5091 I assume you came here because your losing coolant and if your engine is knocking as well, most likely have a leaking headgasket. About 1100 cost of job.
@@dessalinesx5091 The sound you hear is a piston preparing to slam its way through the side of your engine block.
Hi what is the coolant you used and called? I’m looking to refill for my 2010 Prius
It’s in the description box with the link, it’s the 50/50 pink coolant from Toyota, hope that helps 👍🏼
@@NutzAboutBolts thanks!
I'm worried that the Gen 3 Prius (2010) I just purchased has a head gasket leak. I performed the EGR pipe, cooler cleaning along with the intake manifold and i still get the periodic engine shake at start up. I have a OBDII scanner showing a p0301. Which could be a blown head gasket?
I just recently replaced the spark plugs with Bosch Iridiums.
Question, can you perform a block chemical test on the prius via the coolant reservoir? This should be a sure fire way to tell of it's a blown head gasket? I would assume so but you guys seem well versed in Prius and your videos, btw, are super helpful.
Ricardo Santiago, what was the issue? Blown head gasket? Can you preform that test? I have 2014, milky dip stick, cold start knocking, low coolant ( no sign of leaking on ground). No check engine light.
@@terrytorres7075 I did perform the test using the coolant reservoir and it was inconclusive. I didn't have the milky dipstick, but think for sure it was the head gasket in cylinder one. My fix was simple, a $12 bottle of K-seal into coolant reservoir and almost 8K miles later, no shakes and no coolant loss. Disclaimer, these block sealers don't work 100% of the time, in my case it did and I believe I was just lucky. I know I'm on borrowed time but until then 258,000 miles and counting.
The awful banging sound you hear is a piston preparing to slam its way through the side of your engine block. It is now dead. New engine is now required
@@metrork1 Maybe you're right but not the destiny of my little Prius. A bottle of Kseal seems to have fixed my issue. 8K miles later the Prius continues to rock along. I have been making trips to and from West Palm Beach and Sarasota and averaging 40 mpg at 70-75 mph. Amazing machine. Granted, I know the engine can go at any time and I'm ready for that till then...
@@avidskier73 Update?
I see the you used the same Super long life coolant 50/50 for both Engine and Inverter Coolant. It should work well right?
Yes, that’s the oem.
@@NutzAboutBolts thanks for your great video and answers to my query 👍🙂
Hi, I took my car to the dealer to have the radiator coolant replace and I don't know if they knew how to put the car on maintenance mode anyways after that my car over heats going over 45 MPH I think they didn't bleed out the air by putting the car on maintenance mode and that could be making it over heat. what do you guys think?
I’d take it back to the dealership and complain about the issues to them…