I've been beating my head against the wall about my LMM having the same issue. I never considered the radiator being clogged. Man, I love this channel.
That has to be such a good feeling. And this stuff helps everyone that could be having crazy things like this happening to them. Keep up the awesome work!!
The only way this video could help someone, is if you do the exact opposite of what he said , because everything he said was the exact opposite of correct , He basically just claimed , that if a cooling system holds pressure all night that's bad, and if it holds no pressure that's good, which is the exact opposite of correct , look at the cooling system like a balloon, if a balloon hold air all night long it has no leak, if it goes flat it has a leak , this clown just try to claim if a balloon leaks all it's air out that's good, if it holds air in that's bad , which is insane, .. I have been a technician for 39 years , never in the history of auto repair has anyone ever pressure tested a system because it was holding pressure all night , that's like checking a tire for a leak because the tire never went flat or lost any air , or claiming if a tire holds air all night it must have a leak, but if the tire goes flat over night it's good to go , do you see how silly that is
@@PsychobabbleRapp Too an extent you are right. The system is sealed at 1 atmosphere, so ground level pressure. When its sealed, and hot, expansion makes for a pressure increase in the system (hard hose). When it cools, back to ambient temperature the coolant system levels back to atmosphereic pressure, hence soft hose again. Now if a headgasket leak is present, its going to be a high pressure introduction of exhaust into the coolant system, not an ambient pressure introduction. The headgasket is still sealed enough to not relieve pressure built up in the system, the pressure does not reverse flow back into the combustion chamber. The pressure stays high cause the system is sealed, and has had cylinder pressure introduce additional pressure that never bleeds off, hence the hard hose in the morning.
@@JTFSIX did you watch the video , he claimed to fix a stiff upper hose that held pressure all night by repairing a leak in the lower hose you imbeciles, .. he said he fixed a stiff upper hose by repairing a leak in the lower hose , let that swim around your head for awhile and see if any lights come on
Big shoutout to everyone that comments on these videos! If it wasn’t for the suggestion I would have never figured this out. Thanks again for watching the videos. What should be our first upgrade on the Duramax????
He dribbles…he shoots…and he score! That was definitely a three pointer, I’m glad you got her fixed. Since I have a skinny 2008 LMM, I can hardly wait to see what you have planned for the old girl.
When trouble shooting always start with the least expensive and easiest suspected problems first... You should build this truck to what you wish you could've done to your first Victory Red lmm. She still needs a name tho! 🇺🇸
Not only have I been following for a long time now but I am so excited to see this build and the how-to’s to come with it. As an LMM owner myself, I’m beyond excited!! Keep up with the phenomenal content!
Hey Truck Master! I am really glad you are starting to work on the LMM! Can't wait to see what you have planned! I just recently purchased a 2008 LMM and I have been waiting to see what you would do with your truck. I get good information and advice by watching your videos. I do not want to install junk parts or equipment that are not needed and I appreciate that you take the time to explain the difference about parts that are not so good on your builds. I want to build good power for towing but not build something that will cost an arm /leg. I live in Texas and the temps get really hot in the summer. I was just about to replace the radiator, now I am glad I watched your video.
Any issues? I have the same truck . I think some of my cooler lines are leaking. It’s wet near the coolers in front. Other than that and a small transmission leak mines been great.
Awesome! Glad to see that worked. Kind of bummed I didn't make it to the truck show this time around. The wife's Baby Max Canyon had some parts fall off 😉 would've been interesting to see how it dynos now. Again, great job on the videos.
Nice! Way to keep digging to get to the bottom of the issue - I am sure this will help at least one other person. Thanks for making these great videos.
I rebuilt my lly duramax and followed your headgasket video👍✊ Pretty much the only thing I didn’t replace was the radiator. The truck ran great after head studs gaskets and radiator
Wow. I had a same problem and didn't know that was the issue on a 2005 Ford Excursion. Fortunately I sold as is and later found out the block was cracked. I had know idea that's what it was. Thanks for that awesome post!!!
I just bought my first diesel pickup two months ago a 2008 GMC Sierra 2500HD and already did my first upgrade on it. I went with the HSP high flow bundle kit in candy purple and the EFI Live plus the DSP 5 tune. I love the power behind it now. It feels like a totally different truck……
Gm and aftermarket part manufacturers changed the size of the lower hose push lock connection on replacement parts. Anytime you change the original lower hose or rad you have to change them in pairs. This pertains to 06 and newer duramax trucks.
I’m glad you find the problem with the Lmm. I put a new radiator in my lly recently, I went online to the Dmax store and called them up to see what they recommend what to go with. They told me to go with the max-flow attic radiator with the plastic ends due to the pickup being stock pickup and saying that there is to much body roll and will crack out the aluminum radiators. Somthing to think about. Love the channel. Keep up the content!
When you first showed how hard that upper hose was I knew it could not be a head gasket. If you blew out the head gasket the system is going to pump to cool it out through the brake and it's not going to hold pressure. I honestly thought it might have been the thermostat. But thinking how thermostats were when they go bad they are supposed to be designed to stay open so you can get somewhere safe to repair. Buying that cap was a real good idea I've seen the old style metal ones go bad and wouldn't allow pressure to release. Really glad to see it looks like you figured out what was wrong. Look forward to watching more videos.
Mine is in the shop I had to tune and delete it the egr cooler was shot and it was doing the same thing yours did if it’s not tuned and deleted I highly recommend it
@@TruckMaster no problem I see big things coming for you hard work pays off . Your new garage is great . Can’t wait to see what’s next . And thank you for your service 💯👍🏽💪🏽💪🏽🇺🇸
So I don't understand why it was holding pressure over night, because the only pressure on top hose should be from heat I thought? Also why wasn't the truck overheating if the radiator was plugged?
Glad I found your video. I bought a LBZ for $5000 at auction back in December and it was the exact same situation. Drove it 550 miles home with no issues. Noticed the puke tank cap was loose and would spit coolant out while driving when it was tightened down. Engine passed 3 chemical tests (one while driving). No codes stored. Engine ran perfect and had zero blow-by so I didn't think it was a head gasket to begin with. Truck is fully deleted. Replaced puke tank, cap, and fixed the overflow line but still spitting out coolant. Noticed the truck wasn't getting up to temperature so replaced thermostats and that fixed 90% of my coolant loss. Instead of adding every day, I can make it about 800 miles before low coolant light comes on. Upper hose still stays firmer than it should, but I don't get any coolant leaking out so no clue where it's going. Been thinking that the radiator might have something going on and this gave me more confidence in that. However, I do smell a hint of coolant when I pop the hood so I might just have a really small leak somewhere.
Mishimoto's radiator for a 1993 Dodge doesn't actually fit into a D350 with the 2000 pound front capacity. The front end hardware has some extra components under the radiator and Mishimoto didn't build for that model. Not sure if they've fixed the issue or not, but it took lots of photos and measurements for them to accept a return.
Got 194K on my ‘11 GMC SLT. Your gave me some hope. No issues ever with this truck Going to 200K and getting my Hummer EV 2022. Keeping my duramax tho. I’ve kept it like new since day 1. Great channel btw!
Word of advice with the truck having 200 thousand plus, change the body mount bushings save yourself a lot of headaches with the new aluminum radiator, cause of the body flex it will pop the the cores, I replaced four of mine before finding this to be the problem!
when you have the chance cut those plastic tanks off of your old rad and see if any of the tubes are clogged and your old hose may have an internal spilt inside of it as well that could caused a serious flow problem .
Hopefully they are good to go. My head gadgets blew out big time and the hose was stiff but not rock hard. After studs it builds zero pressure and is extremely soft. Extremely. Even with the gaskets blown I could still squeeze the house pretty good.
I went through 2 of those mishimoto radiators within a year. The passenger side end tank was leaking at the welds. I even had griffin make me a radiator using the mishimoto as a template. Same leaks with the Griffin on the end tank. Luckily both manufacturers refunded my money. I'm back with the ac Delco plastic crap in my LLY. Great video though.
what part about the video was great, was it the part where he claimed if the cooling system holds pressure all night long thats bad, but if it leaks out all its pressure over night thats good, and if it holds pressure good enough that the upper hose stays stiff all night long it must have a leak so lets check it for leaks by pressurizing it, lol good grief, ..there was so much miss information and incorrect assumptions it literally hurt watching this.. in short what he said was, if a tire holds its air all night long thats bad, it must have a leak, , but if the tire goes flat over night thats good, thats what we want, lol , .. if you have a tire that holds air and doesn't go flat, would you check the tire for leaks ? , if your tire goes flat over night would that indicate its good , because that what was shown in this video, .. that upper hose should have pressure in it, it should be stiff, and should hold that pressure for days if not weeks, if your cooling system leaks out all its pressure in a few hours, thats bad my freind, not good
I’m having this same exact issue with my 06 LBZ. Constant pressure in upper radiator hose, but the weird thing was it only over heated if I drove faster than 65mph. Replaced thermostats multiple times, cap on the overflow replaced twice and replaced radiator. Excessive amounts of pressure in the upper radiator hose constantly. But this last time replacing the thermostats about three weeks ago, now the truck doesn’t get hotter than 190. I’ve driven it 180 miles a day for the past two weeks and haven’t had any coolant out of the overflow, and it isn’t burning any coolant. Still has a lot of pressure in the upper coolant hose but no other issues. Can’t afford to change head gaskets just yet but I mean it doesn’t over heat anymore.
Awesome to see that the hose is still soft, and good tip to know!!! Thank you Josh for that! PS The annoying tick has disappeared and dealership couldn't find anything....
I don't know but I'm pretty sure it's fate that we bought almost the same exact truck at almost the same time...mines not in as good of shape but not too bad. First thing I'm doing is the steering. Your videos help get me excited and help show me what and how to work on it! Keep up the good work brotha!
In case you want some steering info Power Steering upgrade www.duramaxforum.com/threads/power-steering-upgrade-and-part-numbers-updated.1015733/#post-12360645
I’ve got a 6.0 that a shop said has blown HG’s. I refuse to believe them, I don’t have any coolant smell or white smoke and truck pulls like a dream. I do have excessive coolant pressure just like your LMM. I think I’ll try to replace my radiator in hopes that’s the problem. Love your videos truckmaster. Although I’m a powerstroke guy, you’ve taught me a lot
Ok you might have helped me I'm having the same trouble with a 1972 Pontiac Catalina convertible. It will over heat the hoses are super hard I changed the thermostat and it still does it I honestly didn't think about the rad. I changed it about 10 years ago but I have no leaks.
I have a similar issue on my 07 lbz. I’ve changed t stats the cap and reservoir. I think I’ll order a radiator and hose and see what could happen it’s worth it to me being I don’t have coolant in the oil or oil in my coolant and I don’t burn any coolant. I just build pressure after a day of driving and the hose is rock hard
Pretty much all OEM radiators are made of plastic anymore. I changed my Toyota plastic radiator a couple of years ago. It was the original at 16 years old along with the hoses, pump and belts which were changed while I had everything out. Nothing lasts forever.
Curious if it was the radiator & you're not doing anything else with the old one, since it's just plastic sides just smash the plastic & see if there actually is anything plugging it up.
I've seen that in medium duty trucks with cummins. Random overheat just like that. Radiator was plugged very badly. Like some others have said, pop those ends off and look at it.
This video gives me hope that my lml’s head gaskets might not be out. I have same issues. Hard radiator hose and low coolant. It never gets over 210 though. Try a good flush then a radiator. Thank you for the videos!
I'd like to see your video when change out the CP4 to CP3 on you LML , I did it at 145,000 top save $10,000 later down the road . When I pulled the screens , no metal or shavings of any kind. Put the back together and the CP3 been running fine . They say the CP3 injection pump , pumps up to a 1/3 more fuel. Very nice truck you have , looks great !
if you do decide to do head studs on ur lbz plz do a full in depth tutorial on ur other channel, I will be doing them on my lbz prob next year and i know ur video would help me out so much
My thought exactly. That sealant does a number to cooling systems. I have vehicles come in with bro let’s to find out that sealant was used and after repair the heater core was plugged.
definitley looking foward to more content on the lmm i own a 2009 LMM Still Have issues to sort out and looking at doing some more mods on it once i do figure them out. looking foward to building mine more going foward.
If it was already studded,. maybe the head gaskets were leaking and someone added stop leak,. They eventually had to fix it but they left the radiator clogged.
I am starting to wonder if at some point the trucks cooling system was compromised with oil from a head gasket failure partially plugging the passages. Usually people just don’t do head studs to do head studs unless the gasket has failed and have it torn down. Just a thought
I just bought a 2006 LBZ and I love it! It’s definitely a fixer upper only because it needs paint and Tint other than that it’s in perfect shape! (Edit i bough it’s for 3,500$! From an older man I used to be close with)
Have to say I’ve been through everything in my lbs except replacing the radiator. Been under the conclusion I have to do studs and gaskets. But now I have another light at the end of the tunnel to look forward to. Took my LBZ out of service thinking it was head gaskets 3 years ago and bought a new RAM 3500 to use for work and was biggest mistake ever.
Josh who knows maybe cheap rad stop leak was in there that created a spot that caused gunk to build up and you finally knocked it loose and putting a new rad in as preventive insurance cause the old one could have failed in a second spot
Hey Josh, love the videos. Doing head gaskets on my LB7. Should I do the valve cover fuel line grommets? Any help would be appreciated! Keep up the vids!
I love the videos man congrats on all the success and thank you for uploading makes my day
Anytime 👍
@@TruckMaster my lmm seems to leak water in the door panels any known problems?
Wasaw
I've been beating my head against the wall about my LMM having the same issue. I never considered the radiator being clogged. Man, I love this channel.
That has to be such a good feeling. And this stuff helps everyone that could be having crazy things like this happening to them. Keep up the awesome work!!
Thanks Stu!
The only way this video could help someone, is if you do the exact opposite of what he said , because everything he said was the exact opposite of correct ,
He basically just claimed , that if a cooling system holds pressure all night that's bad, and if it holds no pressure that's good, which is the exact opposite of correct , look at the cooling system like a balloon, if a balloon hold air all night long it has no leak, if it goes flat it has a leak , this clown just try to claim if a balloon leaks all it's air out that's good, if it holds air in that's bad , which is insane, .. I have been a technician for 39 years , never in the history of auto repair has anyone ever pressure tested a system because it was holding pressure all night , that's like checking a tire for a leak because the tire never went flat or lost any air , or claiming if a tire holds air all night it must have a leak, but if the tire goes flat over night it's good to go , do you see how silly that is
@@PsychobabbleRapp Too an extent you are right. The system is sealed at 1 atmosphere, so ground level pressure. When its sealed, and hot, expansion makes for a pressure increase in the system (hard hose). When it cools, back to ambient temperature the coolant system levels back to atmosphereic pressure, hence soft hose again.
Now if a headgasket leak is present, its going to be a high pressure introduction of exhaust into the coolant system, not an ambient pressure introduction. The headgasket is still sealed enough to not relieve pressure built up in the system, the pressure does not reverse flow back into the combustion chamber. The pressure stays high cause the system is sealed, and has had cylinder pressure introduce additional pressure that never bleeds off, hence the hard hose in the morning.
@@wheresbrent MWAHAAHAAHAHAHAHAHAHAHAHAHAHAHAAAAAAAAA.....I love this explanation....Thank you sir......."CLOWNS!!!!!....Please get back in the car"
@@JTFSIX did you watch the video , he claimed to fix a stiff upper hose that held pressure all night by repairing a leak in the lower hose you imbeciles, .. he said he fixed a stiff upper hose by repairing a leak in the lower hose , let that swim around your head for awhile and see if any lights come on
Big shoutout to everyone that comments on these videos! If it wasn’t for the suggestion I would have never figured this out. Thanks again for watching the videos. What should be our first upgrade on the Duramax????
I think this truck should be a tow rig simple odds and ends for fuel mileage
Few bolt ons. Nothing. It's beautiful as is
@@Yippa391 I agree
Are you running replicas or adapters for those wheels?
What's the story on the wheels I thought lml wheels what different bolt pattern than lmm. I have an 07.5 lmm and would love to have those wheels.
Dude you are Blessed. Great you hung tough trough the prayer issues with the school . Love your Chanel and your faith.
Thanks Al that’s so true what you are saying
Amen to that
He dribbles…he shoots…and he score! That was definitely a three pointer, I’m glad you got her fixed. Since I have a skinny 2008 LMM, I can hardly wait to see what you have planned for the old girl.
Hook a hose up to old radiator and see what flow out of it looks like. May show something or may not.
"were gonna give the Cummins a rest for a while. Uuuuggghhh" you have no idea man. I feel this on a different level.
When trouble shooting always start with the least expensive and easiest suspected problems first... You should build this truck to what you wish you could've done to your first Victory Red lmm. She still needs a name tho! 🇺🇸
Not only have I been following for a long time now but I am so excited to see this build and the how-to’s to come with it. As an LMM owner myself, I’m beyond excited!! Keep up with the phenomenal content!
I own lmm as well. Does your oil pressure gauge read low sometimes at idle?
Another LMM owner that's excited to see more upgrades
Hey Truck Master! I am really glad you are starting to work on the LMM! Can't wait to see what you have planned! I just recently purchased a 2008 LMM and I have been waiting to see what you would do with your truck. I get good information and advice by watching your videos. I do not want to install junk parts or equipment that are not needed and I appreciate that you take the time to explain the difference about parts that are not so good on your builds.
I want to build good power for towing but not build something that will cost an arm /leg.
I live in Texas and the temps get really hot in the summer. I was just about to replace the radiator, now I am glad I watched your video.
I had the same thing happen with my truck best feeling ever to find out it was just radiator instead of gasket congrats man
👍👍👍
Dead honest. Ive always been a cummins guy but since buying my lly and first duramax your channels been the most usefull thing on the internet
I had an LMM for 8+ years, 310k mikes. Solid unit.
Any issues? I have the same truck . I think some of my cooler lines are leaking. It’s wet near the coolers in front. Other than that and a small transmission leak mines been great.
Awesome! Glad to see that worked.
Kind of bummed I didn't make it to the truck show this time around. The wife's Baby Max Canyon had some parts fall off 😉 would've been interesting to see how it dynos now.
Again, great job on the videos.
You have the best head gasket video on youtube I watched your video over 100 times in the process, thanks Dude
Pop the sides off the old radiator and you will be able to see if its plugged or not.
Nice! Way to keep digging to get to the bottom of the issue - I am sure this will help at least one other person. Thanks for making these great videos.
In future to Diagnose blocked radiator use laser Thermometer hit different parts and if blocked will have drastically different temps
I rebuilt my lly duramax and followed your headgasket video👍✊ Pretty much the only thing I didn’t replace was the radiator. The truck ran great after head studs gaskets and radiator
Wow. I had a same problem and didn't know that was the issue on a 2005 Ford Excursion. Fortunately I sold as is and later found out the block was cracked. I had know idea that's what it was. Thanks for that awesome post!!!
Thanks 🙏
Glad to see you got that pressure issue sorted out. First upgrade on any duramax should be a lift pump.
Lift pump on LML too?
I just bought my first diesel pickup two months ago a 2008 GMC Sierra 2500HD and already did my first upgrade on it. I went with the HSP high flow bundle kit in candy purple and the EFI Live plus the DSP 5 tune. I love the power behind it now. It feels like a totally different truck……
Love your channel dude, very educational. Your channel is one of the main reasons I recently picked up my 2006 LBZ Duramax.
Gm and aftermarket part manufacturers changed the size of the lower hose push lock connection on replacement parts. Anytime you change the original lower hose or rad you have to change them in pairs. This pertains to 06 and newer duramax trucks.
I’m glad you find the problem with the Lmm. I put a new radiator in my lly recently, I went online to the Dmax store and called them up to see what they recommend what to go with. They told me to go with the max-flow attic radiator with the plastic ends due to the pickup being stock pickup and saying that there is to much body roll and will crack out the aluminum radiators. Somthing to think about. Love the channel. Keep up the content!
Body roll? It’s held into the core support… there’s no rolling going on there 😂
When you first showed how hard that upper hose was I knew it could not be a head gasket. If you blew out the head gasket the system is going to pump to cool it out through the brake and it's not going to hold pressure. I honestly thought it might have been the thermostat. But thinking how thermostats were when they go bad they are supposed to be designed to stay open so you can get somewhere safe to repair. Buying that cap was a real good idea I've seen the old style metal ones go bad and wouldn't allow pressure to release.
Really glad to see it looks like you figured out what was wrong. Look forward to watching more videos.
Nice, I don’t work on trucks much but these can’t be to bad to pull the heads off, props to you
Thanks
Mine is in the shop I had to tune and delete it the egr cooler was shot and it was doing the same thing yours did if it’s not tuned and deleted I highly recommend it
Great problem diagnosis and repair with steps video. Can’t wait to see more 💯💯💪🏽👍🏽
Thanks Tre!
@@TruckMaster no problem I see big things coming for you hard work pays off . Your new garage is great . Can’t wait to see what’s next . And thank you for your service 💯👍🏽💪🏽💪🏽🇺🇸
So I don't understand why it was holding pressure over night, because the only pressure on top hose should be from heat I thought? Also why wasn't the truck overheating if the radiator was plugged?
Glad I found your video. I bought a LBZ for $5000 at auction back in December and it was the exact same situation. Drove it 550 miles home with no issues. Noticed the puke tank cap was loose and would spit coolant out while driving when it was tightened down. Engine passed 3 chemical tests (one while driving). No codes stored. Engine ran perfect and had zero blow-by so I didn't think it was a head gasket to begin with. Truck is fully deleted. Replaced puke tank, cap, and fixed the overflow line but still spitting out coolant. Noticed the truck wasn't getting up to temperature so replaced thermostats and that fixed 90% of my coolant loss. Instead of adding every day, I can make it about 800 miles before low coolant light comes on. Upper hose still stays firmer than it should, but I don't get any coolant leaking out so no clue where it's going. Been thinking that the radiator might have something going on and this gave me more confidence in that. However, I do smell a hint of coolant when I pop the hood so I might just have a really small leak somewhere.
Nicely done.
Got 250k on my LMM stock radiator. No issues.
Hope Dylan wasn't too pissed. I like him and his channel too. Looking forward to the lly vids. 🇺🇲👍
Troubleshooting at it’s best. Keep up the great work.
Mishimoto's radiator for a 1993 Dodge doesn't actually fit into a D350 with the 2000 pound front capacity. The front end hardware has some extra components under the radiator and Mishimoto didn't build for that model. Not sure if they've fixed the issue or not, but it took lots of photos and measurements for them to accept a return.
Good to know 👍
Got 194K on my ‘11 GMC SLT. Your gave me some hope. No issues ever with this truck Going to 200K and getting my Hummer EV 2022. Keeping my duramax tho. I’ve kept it like new since day 1. Great channel btw!
Word of advice with the truck having 200 thousand plus, change the body mount bushings save yourself a lot of headaches with the new aluminum radiator, cause of the body flex it will pop the the cores, I replaced four of mine before finding this to be the problem!
I have a extremely clean 19 2500 with 71,000 miles on Facebook marketplace long bed , Bluffton Ohio
when you have the chance cut those plastic tanks off of your old rad and see if any of the tubes are clogged and your old hose may have an internal spilt inside of it as well that could caused a serious flow problem .
Good point
Hopefully they are good to go. My head gadgets blew out big time and the hose was stiff but not rock hard. After studs it builds zero pressure and is extremely soft. Extremely. Even with the gaskets blown I could still squeeze the house pretty good.
Glad it worked out for u now it’s time to build some power!
Definitely 👍
Favorite truck on the channel! I look forward to seeing more content on it!
Thanks!
I went through 2 of those mishimoto radiators within a year. The passenger side end tank was leaking at the welds. I even had griffin make me a radiator using the mishimoto as a template. Same leaks with the Griffin on the end tank. Luckily both manufacturers refunded my money. I'm back with the ac Delco plastic crap in my LLY. Great video though.
This is great info I didn’t know those radiators were so problematic
what part about the video was great, was it the part where he claimed if the cooling system holds pressure all night long thats bad, but if it leaks out all its pressure over night thats good, and if it holds pressure good enough that the upper hose stays stiff all night long it must have a leak so lets check it for leaks by pressurizing it, lol good grief, ..there was so much miss information and incorrect assumptions it literally hurt watching this.. in short what he said was, if a tire holds its air all night long thats bad, it must have a leak, , but if the tire goes flat over night thats good, thats what we want, lol , ..
if you have a tire that holds air and doesn't go flat, would you check the tire for leaks ? , if your tire goes flat over night would that indicate its good , because that what was shown in this video, .. that upper hose should have pressure in it, it should be stiff, and should hold that pressure for days if not weeks, if your cooling system leaks out all its pressure in a few hours, thats bad my freind, not good
Crazy, but my buddy put studs in a power stroke one bolt at a time, never changed gaskets, good luck
Same thing I did with my Cummins, worked great.
Top notch as usual brother!!! GOD Bless America and the 2A!!!
And Diesels (-:
Definitely!
Congratulations on your FB Market Place Victory!!!!
I’m having this same exact issue with my 06 LBZ. Constant pressure in upper radiator hose, but the weird thing was it only over heated if I drove faster than 65mph. Replaced thermostats multiple times, cap on the overflow replaced twice and replaced radiator. Excessive amounts of pressure in the upper radiator hose constantly. But this last time replacing the thermostats about three weeks ago, now the truck doesn’t get hotter than 190. I’ve driven it 180 miles a day for the past two weeks and haven’t had any coolant out of the overflow, and it isn’t burning any coolant. Still has a lot of pressure in the upper coolant hose but no other issues. Can’t afford to change head gaskets just yet but I mean it doesn’t over heat anymore.
Awesome to see that the hose is still soft, and good tip to know!!!
Thank you Josh for that!
PS
The annoying tick has disappeared and dealership couldn't find anything....
It’s so normal for these engines to tick sometimes it’s the oil you use
I don't know but I'm pretty sure it's fate that we bought almost the same exact truck at almost the same time...mines not in as good of shape but not too bad. First thing I'm doing is the steering. Your videos help get me excited and help show me what and how to work on it! Keep up the good work brotha!
Thanks brother!
In case you want some steering info Power Steering upgrade
www.duramaxforum.com/threads/power-steering-upgrade-and-part-numbers-updated.1015733/#post-12360645
I miss these kinds of videos, troubleshooting and DIY
I’ve got a 6.0 that a shop said has blown HG’s. I refuse to believe them, I don’t have any coolant smell or white smoke and truck pulls like a dream. I do have excessive coolant pressure just like your LMM. I think I’ll try to replace my radiator in hopes that’s the problem. Love your videos truckmaster. Although I’m a powerstroke guy, you’ve taught me a lot
Please do a lift pump install I also have an 08 lmm! Thanks for the videos as usual awesome josh!
Ok you might have helped me I'm having the same trouble with a 1972 Pontiac Catalina convertible. It will over heat the hoses are super hard I changed the thermostat and it still does it I honestly didn't think about the rad. I changed it about 10 years ago but I have no leaks.
Lucky guy! I didn’t get that lucky with my LLY. Glad it worked out for you!
Might help in future searches to put coolant fixes or similar keywords in the description so someone with problems can find the vid
I startting school as a diesel mechanic. I can't wait to buy an older diesel and fix it up.
Terrible idea
@@haydenroyer lol what, school or the truck?
I have a similar issue on my 07 lbz. I’ve changed t stats the cap and reservoir. I think I’ll order a radiator and hose and see what could happen it’s worth it to me being I don’t have coolant in the oil or oil in my coolant and I don’t burn any coolant. I just build pressure after a day of driving and the hose is rock hard
Consider a Rudy's diesel hose kit to get rid of the plastic Tee in the bottom hose. PPE has em too but seem the same and more $
That coolant gm uses dexcool or whatever crap it is...is exactly what it is CRAP, it's known to do that to them radiators. Glad you fixed the problem
Bro that’s amazing! Trucks gonna be siiick !!!
Pretty much all OEM radiators are made of plastic anymore. I changed my Toyota plastic radiator a couple of years ago. It was the original at 16 years old along with the hoses, pump and belts which were changed while I had everything out. Nothing lasts forever.
A lot of duramax guys jump to head gaskets but I've seen a lot of egr coolers that act exactly like a head gasket when they go bad
I know what you mean, luckily mine fell off somehow
Curious if it was the radiator & you're not doing anything else with the old one, since it's just plastic sides just smash the plastic & see if there actually is anything plugging it up.
Now I'm wondering if my jeep has this issue...does the same thing but the rad was replaced awhile back
Sometimes it's best to think it through and take your time to figure out the problem. Start with the small stuff and eliminate each step.
Hey same truck as mine, same year too. Dashboard rattle is bad
Good to know they have rattles
I've seen that in medium duty trucks with cummins. Random overheat just like that. Radiator was plugged very badly.
Like some others have said, pop those ends off and look at it.
This video gives me hope that my lml’s head gaskets might not be out. I have same issues. Hard radiator hose and low coolant. It never gets over 210 though. Try a good flush then a radiator. Thank you for the videos!
Could try and run something thru the old rad and see if it’s clogged. Or open it up. Just to see it’s failure points
That’s always good to hear lol! Good simple fix
I'd like to see your video when change out the CP4 to CP3 on you LML , I did it at 145,000 top save $10,000 later down the road . When I pulled the screens , no metal or shavings of any kind. Put the back together and the CP3 been running fine . They say the CP3 injection pump , pumps up to a 1/3 more fuel. Very nice truck you have , looks great !
the chevy is an awsome truck. our railroad has the same model very reliabe withe 400k mi and counting
Job well done man, congrats. Look forward to the next video.
That’s awesome you got it fixed
Josh we need to see some more of the denali l5p!!!
2013 Chevrolet lml. Been losing water excessive pressure. To find out it was a bad over flow tank and a sticking thermostat
if you do decide to do head studs on ur lbz plz do a full in depth tutorial on ur other channel, I will be doing them on my lbz prob next year and i know ur video would help me out so much
Great video. If the head gaskets were gone and they used some kind of head gasket sealant it might have plugged up the radiator
My thought exactly. That sealant does a number to cooling systems. I have vehicles come in with bro let’s to find out that sealant was used and after repair the heater core was plugged.
definitley looking foward to more content on the lmm i own a 2009 LMM Still Have issues to sort out and looking at doing some more mods on it once i do figure them out. looking foward to building mine more going foward.
If it was already studded,. maybe the head gaskets were leaking and someone added stop leak,. They eventually had to fix it but they left the radiator clogged.
That’s a very good point
Awesome video and congrats on the come up! I want a dirtymax so bad
I would.love to find a deal like this on another truck, need another one to drive so I can do some bug stuff to my 1500HD
I have same radiator I love it keeps my truck nice and cool
I am starting to wonder if at some point the trucks cooling system was compromised with oil from a head gasket failure partially plugging the passages. Usually people just don’t do head studs to do head studs unless the gasket has failed and have it torn down. Just a thought
Wow I wonder how many mis diag’s were done and it could have just been a rad? Cool stuff man.
Thanks
I just bought a 2006 LBZ and I love it! It’s definitely a fixer upper only because it needs paint and Tint other than that it’s in perfect shape! (Edit i bough it’s for 3,500$! From an older man I used to be close with)
Good job man you know your stuff 👍
I’ve always loved duramax trucks
Have to say I’ve been through everything in my lbs except replacing the radiator. Been under the conclusion I have to do studs and gaskets. But now I have another light at the end of the tunnel to look forward to. Took my LBZ out of service thinking it was head gaskets 3 years ago and bought a new RAM 3500 to use for work and was biggest mistake ever.
Spoiler, it was not head gaskets it was a plugged radiator...
No it was a radiator thank you for sharing
Josh who knows maybe cheap rad stop leak was in there that created a spot that caused gunk to build up and you finally knocked it loose and putting a new rad in as preventive insurance cause the old one could have failed in a second spot
Ryan’s was just saying that 😂👍
I wish you sell on of the chevys you have would love to buy one. They are all awesome rides
Hey Josh, love the videos. Doing head gaskets on my LB7. Should I do the valve cover fuel line grommets? Any help would be appreciated! Keep up the vids!
You don’t need to but it’s a great idea
You should build that truck like your other lbz like color match leveled wheels tires leds maybe some cooler motor mods and keep it that would be 🔥
Well water can also cause issues over time, due to the iron, calcium,lime content in it..
Great job, Josh. Always good to see a happy ending!
Twin turbos please!
I have an 09 6.0L and the radiator is also and issue. I love the truck but would rather have yours!
When you toad your other truck home with it I had a feeling it wasn’t head gaskets either
Could have been the heater core also