10 Reasons Why Engines Lose Power Over Time
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- Опубліковано 5 чер 2024
- Why Do Engines Lose Horsepower As They Get Older?
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There are four things a gasoline engine requires to generate power and almost any engine problem will come down to something relating to one of these four factors. 1. Air 2. Fuel 3. Compression 4. Spark
Dirty Air Filter
A clogged air filter makes the engine work harder to pull in air, and can restrict the maximum amount of air let in. Less air means less power.
Exhaust Restrictions
The engine will have to work harder to push out exhaust gases, limiting power. Catalytic converters can clog up on engines with an improper air/fuel mixture or as a result of fuel additives reacting within. Mufflers can also fail internally, and alterations of the internal piping can result in an airflow restriction.
Fuel Injectors
Deposits can build up on the injectors over time from heat soak or poor fuel. Small restrictions can cause the O2 sensors to read a lean mixture, and so more fuel will be added to compensate. This can result in a rich mixture for the cylinders without injector problems, or even misfiring if the injector isn’t capable of injecting enough fuel.
Fuel Pumps
Overtime the fuel pump can wear out, but it might not necessarily fail catastrophically. While it may still be able to supply fuel at lower pressures, it may begin to struggle to provide fuel at higher pressures or for longer durations.
Worn Piston Rings
One of the major things that can happen over time is the piston rings will wear down, and this will allow for blow-by. Some of the high pressure air and fuel mixture combusting will pass by the pistons and travel along the cylinder walls into the crank case. This is pressure that should be pressing the piston down, so power is lost. It also means less compression as some of the air can escape as the piston travels upward on the intake stroke.
Carbon Deposits On Intake Valves/Valve Seats
If carbon deposits build up on the valves or valve seats, this can prevent the valves from closing properly. If an intake valve cannot fully close, it will allow air to escape during the compression stroke, effectively lowering the compression ratio.
Carbon Deposits On The Piston
If deposits build on the piston or cylinder walls, these deposits can create hot spots. These hot spots can result in engine knock if conditions allow for it. If the engine is capable, it will retard the ignition timing to reduce the likelihood of knock. By retarding the ignition timing, power is lost.
Fouled Spark Plugs
Spark plugs can build deposits with time. Inconsistent spark plug firing means you’re likely to misfire. Maintaining clean plugs ensures that the spark part of the equation doesn’t result in a loss of power.
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10 reasons, 5 mins, 2reasons per min, 1reason every 30secs, excellent video...quick and to the point. 👍🏻
Very long comment, directly to the point. After that repeating the same comment in two different ways 🌚
Quick mafs
yea this why i like his videos it dont have 10 minute ads
@@essai_ dead meme
@@nepzski pull up irl I’ll bop u kid
You’re helping me so much to learn about the mechanics of cars rather than just blindly adding mods. Keep up the amazing work and I can’t wait to see your future!
Happy to hear it, thank you for watching! :)
people for some reason always ignore the air filter and spark plugs... it grinds my gears. like that's the most basic stuff. and people run their car to the junkyard or sell it because they don't know why their car is lacking power. agh. this video was helpful anyway
hi I like your method can it get you online so we can chat , I like to be a engineer
Awesome video!!!
ChrisFix hey guys!
Haha Chris youre here too? :D
Love your channel!
ChrisFix here!
HEY GUYS CHRISFIX HERE
I read that in your voice :))
I just keep modding it... doesn't loose power over time, just increases the potential breakdowns
Hudson Stronck 👍🏽
Um no
lol
Exactly. Ported throttle body, bigger and better injectors, exhaust, header, and mechanical fan delete and I'm making more than stock on my Jeep with almost 300k on it
You lose power. A nut becomes loose.
This has been your most short and to the point video I have yet to see, I like it.
2016 Camry tune up
Too short TOO SHORT
He's not padding his video length unnesserily hoping to increase advertising revenue. Great UA-camr, subscribed.
My 3.4L V6 GM engine is more powerful today than it was back in 04. I changed out to Mobil 1 soon as I got it home. Been using it ever since. Changed out OE air filter to K&N. Changed out restrictive exhaust to dual exhaust with 1/2" larger pipes. Changed out to new OE plug wires. Bosch Iridium spark plugs. Change out AT fluid at 60000. Maintain the car all the time myself so I know the work is done correctly with the right fluids and oil. Changed to all LED lights, including dash light. Added performance tires and wheels which lets the vehicle roll easier (reduces road friction). Stuff like that.
Performance tires have increased rolling resistance lol
I just saw you on a GMC commercial and I wanted to comment and say congratulations but comments were disabled on that video so I came here, congratulations on all your progress! It's so cool to see how far you've made it.
dirty fuel filter sometimes makes your fuel pump work harder so you might wanna check that too.
besides this pressure on fuel pump may cause damage so replacing it might be a good idea
I thought this was an incredible video- very direct and to the point with such a clear explanation as to the importance of all of these factors. Thank you for posting- I really enjoyed it!
Yet another great informative video, gotta love Jason's work
I didn’t even see the video all the way through and I’m happy to subscribe to this Chanel’s content. Loving the detailed explanation🤯
Glad you got a sponsor. Checked it out and I like how it aggregates results.
Some of these things can be easily fixed (e.g. replacing a single cheap part), some not. It would be great if you could have a video explaining what to do to diagnose and fix each of those possible issues.
A good example of that is the engine knock. It doesn't mean you just lose power it means your engine is going to catastrophically fail imminently and needs to be scrapped.
@@srspower 1997 engine is hard jackpot
Jaguar 1997xjR8
this is by far the best car channel on youtube. thanks for everything!
This has explained so many of my car's issues! If it lives long enough I know what I'm doing to improve its clean running and power issues.
Great video! It explains all points you need to check out, mostly when you are trying to squeeze all the power from your engine.
How about a fuel filter? I would think a clogged fuel filter would restrict fuel, especially under heavy loads.
of course,there are way more reasons,but he just said the main reasons ;)
Once bought a van for $50 because a guy was movingnout of our apartment building and it wouldn't run. Pulled the cover off the motor found and replaced the $2 fuel filter. Shazam $52 van.
My car became way more alive after I changed the fuel filter. Surprising how much of a difference that made.
Funny, unless you're a car enthusiast/mechanic than a fuel filter is usually one of the most neglected maintenance items. I don't think I've ever gone to a quick lube place and been tried to be upsold a fuel filter.
And you never will. Car Engineers today had the brilliant idea of putting the fuel filter inside the gas tank. To change a fuel filter in most modern cars you have to drop the fuel tank. A $1000 fix (due to labor cost), unless you do it yourself.
Wow. 10 reasons in 5 minutes. Normally it's 5 things in 20 minutes everywhere else. Love those videos
Thanks for keeping it short, simple & easy to digest. Got an extra subscriber in 5mins
This autoTempest website is actually awesome its just direct comparisons to all my normal search places, thanks for the recommendation I plan to use this in the future a bunch
Awesome video I wish I cud explain things as well as you do
Best teacher ever !!!!
Keep it up !
Great info, thanks and keep up the good work
We heard it from the engine expert. Absolutely Amazing Informative Video. Thanks so Much.
Quite a comprehensive description there, and suggests many inexpensive solutions to maintaining power, much of which is manufacturer's recommended maintenance intervals...
Thank you , your one of the Best Teachers , I give you an A+ ...
Although you are right about ring gap increasing over time it is the wear on cylinder crosshatching that adds the most noticeable blow-by which is why a hone is essential for an engine build; with a worn cylinder wall there would be very minimal compression
Thanks! I was curious about this for some time now and had to watch! Keep up the good vids!
Great video. Lot of enthusiasts focus too much on new parts and forget about good ol' maintenance.
Awesome video Jason! Keep them coming!
My car lost a lot of power when I started dating my 250 pound girlfriend.
I guess your the one being tune up and change oill ehhhhh, hahhaa
Lol
Pretty funny hahaha
Lose compression
Thats a cow
Yes. Been looking for this info. You are the only one that actually explained me what's happening to my engine and why.
Quick and to the point. Awesome job
Rust = weight reduction
Lol
@La Dragon Noir Funny thing is, the formation of rust actually increases the weight. After the rust wears off, that's when the weight decreases.
until the car frame breaks then its not so funny
Spray salt water all over
Ouais non mdr
I've got 600,000kms from a Land cruiser all original still running like new when I sold it. As well as getting hundreds of thousands of kilometers from other cars.
My tips:
1) don't use the oil your manufacturer recommends, use synthetic oil according to your climate grade. For example, Toyota put 5w-30 in engines in Australia where it gets to over 40c and the engine starts burning the oil. I use 15w-50
2) Change your fuel filter annually and if you have a diesel with mechanical injection pumps, use a good quality fuel stabilising additive that conditions seals and rings while removing contaminants and algae.
3) Don't forget gearbox oil changes, and if you have a 4WD, transfer and diff oils too. Don't forget to grease all grease points in the drive line and suspension.
4) Flush out your radiator properly, I mean removing hoses, flushing the heater core, making sure no hoses crunch with rust when squeezed and use coolant that feels slippery and silky between your fingers.
LOL. Using 5w-50 and the recommended from factory is 5w-30. I hope NO ONE takes you or your horrible advice serioulsy.
@@AbduulG well he is kinda true, 5w30 is really thin (like water thin) at high temperatures (speed), so on the highway for example. 5w40 would give you a bit more oil pressure and less wear. Most manufacturers use thin oil (0w20 or 5w20) for achieving better mpg (less friction after cold start). But it doesn't mean it's better for durability! I know it from tractors too, some used to burn a lot of oil on 10w30 but with 15w40 there is not a single issue! 10000hours and still no problem, (no oil burning) with an average of 40mph that would be 400000 miles! :) (And that's a lot!)
I average 450,000 - 500,000 miles with my vehicles. Oil changes @ 3,000 miles - Wal-Mart SuperTech 10W-30 non synthetic oil - Bosch filters. At 100,000 mile mark - change manual trans & rear end gear oil - replace timing belt/components - check/replace spark plugs/vacuum hoses - flush cooling system - new shocks - check suspension - regrease front wheel bearings - and just look/see for anything needing attention.
Got 482,000 miles with 1996 Rodeo 6 cyl - valve guide seals started leaking - engine smokes a little at start up but still runs fine - has 60 psi oil pressure. Plan to pull heads for repair.
Just simple maintenance saves a lot of $$ - doing your own repairs even more. New car payments (and costly insurance) just flat out suck! I like having money in the bank. 😊
#1 is horrible advice. Heavier than recommended oil especially in a multi-valve or turbo engine is a no-no because you need the oil to penetrate through all those tiny spaces with ease. Also, the argument about Australia getting ‘too hot’ is BS. Ambient temperatures are always lower than engine operating temperatures…oils are designed to withstand engine temperature which is more than 100 degrees celcius unless Australia gets hotter than that, your ‘advice’ is bad. You should be thanking God for Toyota making an excellent engine that withstood your poor maintenance. LOL.
I love your videos! 😊
Your explanations are very detailed, just like a teacher. Well done!
Very educationally rich! Great presentation
i had idle problems with my car, it was idling around 600rpm. after adjusting the spark plug gaps, at first start rpm went up around 2k and slowly fell down to perfect. its incredible how little things can cause big power losses.
That's not something that happens over time. You failed to adjust the gap when you installed them.
yep, mechanic screwed it up while installing. i just wanted to point out that even adjusting the gaps made such a big difference. even some things that happen over time can be corrected with small adjustments that will made huge differences.
I had similar idling issue, but mechanic said it was the fuel pump. How do I know if my Cat conv is bad?
KOLT if your car is newer then 1995 it will tell you with a check engine light. Obd1 or anything newer then 1996 metallic rattling inside the cat or smell of exhaust changing with odometer increase can indicate a bad cat.
2:45 Jason silently judging from behind 🤣🤣🤣
Man, such a complete overview video!
Freakin loved it, every factor addressed, in an orderly, logical fashion
You covered pretty much everything but the drivetrain, which is a different set of systems.
(new video idea maybe, losses in drivetrain?)
Short and straight to the point, good video
The segment about Fuel Pumps is "partly" inaccurate. (For fuel-injected systems.)
- It's not so much a reduction of "volume" of fuel flow. What is important is that a "weak" pump might-be pushing the volume, BUT... the greater question is: Is it creating the "PRESSURE" (PSI) needed on the injection-system? That PSI is important to push the correct volume of fuel through the injectors,... and it also affects the "atomization" of the fuel spray.
Awesome video... I do have a follow-up question. Could indexing the spark plugs have a positive impact during this process?
i dont know why people thumb down your videos. your probably the best person at expaining such scenarios, better than most i have come across. chrisfix is another goody . keep up the good work 👍🙋♂️
Nice, precise and straight to the point
I like how you not only listed diagnostic information about each component, but also ways to keep each component working optimally, but I'm wondering how often you might need to make adjustments and/or replace each component due to just normal wear and tear. I know each car is probably different, and each component is also maybe different, but maybe like a basic guideline would be good... like the air filter usually should be changed with every other oil change, or maybe if you live in a particularly dusty part of the country more often than that... or Catalytic Converters usually last for ~150 thousand miles... (I dunno if thats true or not)...
it's on the frigging manual on when to replace these parts.
Usually it comes with a maintenance manual or online resources can be more make/model specific.
Thanks for this video, i'm learning so much about engines :)
How to change transmission oil for discovery td5 automatic gear box
Awesome stuff. Can't wait for part 2 of the Pull-a-part contest video
I just want to say that i love your videos and it realy helps me in my need. Thankyou for taking a good research.. keep it up
Number 11: Aging Go Fast Stripes. As Go Fast Stripes age, the car will lose 10 to 15 percent power.
Also hire-cars are much faster.
Appreciate the video.
Ideas for improving at least some of those problems? Changing spark plugs is obvious, but what about all of those other deposits inside the engine? Some way to dissolve or blow them out, with additives and/or driving style?
Running a full tank of high octane gas will help, Just fill up the entire tank from empty on the highest octane available and dont fill up on what you would normally use until your empty again.
@@ghosthawk3103 why is this? I thought higher octane only meant it would prevent pre-ignition. Are you saying it burns at a higher temperature thus ashing/dissolving the deposits away?
Excellent video, right to the point, simple and informative. Thank you.
one of my favorate video on youtube.
good go dear you are only person
that making amazing video
first ever thanks on youtube.
I can simplify this for you... Ten reasons why an engine can lose power over time.
Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance... Wear.
Not necessarily. Some engines esp. Nissan from certain years are built poorly
About 90% of power loss is due to neglect it will lose a bit no matter what.
@@gravemind6536 Neglect and abuse.
Don't forget poor maintenance
@ It depends on the engine build quality and design tbh, wear and conditions and environment the engine is used. Not all engines are created equal, take for example the 4G63 N/A SOHC, a legendary engine when properly used and maintained is just shy of immortal. This engine is so good and reliable the factory made it into DOHC Turbo (300+BHP) without taxing the reliability. Modders took it into more extreme tuning with many breaking the 1000+ BHP mark. Well if that engine can produce that power and reliably up to 700BHP, at the factory 115BHP it simply can never die with proper maintenance.
How do you feel about extended oil change intervals using something like Amsoil and a better filter?
There is a lot more things that make a vehicle lose power and these are just major hits of why they do. Very good video
Hey man I’ve been watching your videos and learned so much?
Thank you
You forgot Fuel Filter!:) Same issues as air filter, except with fuel.
Factory Five 818 Build well I guess he included this out because you are supposed to replace the fuel filter every couple of years...
Don't forget your spark filter.
You're supposed to replace the air filter every now and then but yet it was mentioned here :)
thanks, i almost forgot that . adding it to my list
also, tires can affect power especially if they're oversized tires
A lot of engines gain power as they "loosen-up" with some miles on them, then eventually lose power as they wear out many tens of thousand of miles later. I had 2 Coyote 5.0 Mustangs which gained 3-4 mph of 1/4 mile trap speed once past about 20,000 miles. They were making more power than new.
Best explanation of possible issues explained nicely in a timely manner. 💗👌
Love the pan up from the injectors, you crack me up.
How about them fuel injectors.... VR6t!
i haven't seen completely the video but i already gave my like because i know it's going to be awesome.
chelar estelar Yes. I click like on his videos before the as is over too. :)
This is the explanation I give when I ejaculate prematurely.
i already know the general answer to the questions or video topics but always click because it's just interesting to see how he approaches the explanation.
Another nice video on cars. The section on piston rings and valve wear could have mentioned heat from turbos and high rpm
can cause floppy pistons and premature wear of metal and rubber seals, So, keeping heat and rpm low will definitely help engine parts
and the longevity of your car. I rebuilt engines for years and this was the golden rule.
Great Content.
Mario
Just admiring your craft beer sticker wall, man. Well done! Great video too!
*I Am Happy That I Understood This Video!!* 😂
*Miracle*
MatZak 2004
It’s ok buddy, I’m slow too
What about carburetor engines.. it's loosing power on hills
What a great video! Thank you for the very information content.
We are learning from you .Thank you very much 👍
This video explained in one word
Wear
Combustion
entropy
Pollution
You are really Takahashi Ryosuke
Well u summed that whole vid in a couple words what a genius 😁
So, basicly if you replace and rebuild all the parts you just mentioned, there is a possibility for the engine to run as new?
A buddy of mine had an engine rebuild. He went from 10w40 to 5w50 over winter and 10w50 over summer (he does big milage).
When he went to remap the ecu after the whole rebuild, the power at the crankshaft was showing ~10 hp less when the car was new (wow, you can read the brouchure).
How would you explain that?
Thank you. I have been wondering the specific things like this for awhile so thank you for telling me.
@EngineeringExplained I love your channel and have been following you for a long time. I would love to see you do another project car like the Integra. I loved the combination of the build and your signature engineering explanations. Just food for thought! Keep up the good work!
Just like an old person, you need to replace or fix the broken parts.
MBW reading that just made my day a lot worse
MBW the deposits on her cylinder walls are starting to become an issue, so it delays the spark timing.
That old person will be the one fixing your car , most women know one thing how to start a car although they made it easy for them with push to Star button !
Yes, you don't want things sagging. So be sure to replace.
well done Einstein.
for us old timers, valve seat recession, Camshaft lobe wear (reduced valve lift), increased clearances in big end bearings , weakened valve springs, coked up piston crowns.
Also for the newer ones, clogged or worn injectors.
Indeed. I am with u especially on t worn cam lobes that's t worst. something this young fella failed to descrive
Super duper beneficial to know those point of failures.
Great Video Format I like the board with visuals
Another good use for AutoTempest.com is to look at other cars comparable to yours to get a price idea for a car you are selling.
VR6 block spotted at the background
friend of our converted his truck to propane and we did a tear down of his engine and it looked bran new, another thing we hav noticed our engines once getting around 36k miles is when we noticed a increase in fuel mileage, people dont like to maintain or do mantaince until they have a problem this is key to follow up on follow thur with proper maintence and you will be fine, again my friend came down from canada we had same trucks but he gets almost 3x the fuel milage we get, the tech, is there and yes after he was here for 8 months the dealer said he had a recall on his fuel system, ha, he said he wasnt changing anything, and he didnt,
Very Helpful Tips! Thanks EE!!
Hello Jason, quick question. How do you know you're injectors are getting clogged and how reliable are those cleaners you out in the fuel to open them. Or is it better just to change them after a certain period? The service manuels of my cars don't have info on this.
Injector cleaners work, but if you already have a fully clogged injector, the cleaners wont work anymore.
No easy way to tell at home without a tool. With a fuel pressure gauge and an injector pulse tool you can do a pressure drop test to see if they flow consistently. If you have a scan tool that shows fuel trim you could tell if they are ok if fuel trim is still within spec.
If you use high quality fuel you don't need to worry
Nicolas Losito what high quality fuel? Like shell/bp?
A good way to keep your catalytic converters from clogging is to get an aftermarket exhaust without them. I did it and it's amazing
Excellent video... Very on point!
Very informative, thank you! keep up the good work :)
awesome to see 2160p
11696Ron I tried 1440p and it took 3 mins for 13 seconds of the video to play
I mean that's based on your connection and your device really. Everything runs fine for me, but that's because I'm using a good PC, have a wired connection and verizon fios.
So do engine's ECU have the ability to detect and compensate for knock? That'd be a good video: discussing everything the ECU does
Even if the ECU supports knock detection, you still need a knocksensor to make it work.
Ehm nope. Knock is a term for unwanted ignition of the air-fuel mixture before the piston hits top dead center. This happens if the temperatures in the cylinders are so high that the mixture ignites itself OR if the sparkplugs misfire.
Rod knock? Where the rods smash against the block?
Never heard of calling that knock before. In Europe that's called engine failure ;P. Btw you guys have your octane rated according to the AKI system right? That is short for Anti Knock Index, so I didn't assume it was a localization thing.
@quasarcreator We call that chainsawing your block in half ;P
When doing fuel system upgrades its always wise to add an additional fuel filter, replace the fuel lines, and clean or replace the fuel rail.
You are a genius! I always appreciate your videos to help us car people understand things better about our cars. Thank you! 👍😀
U now using Mac?? Also missing build videos of ur s2k
That could be more general example footage for the site, sent to people sponsored by 'em, a lot of websites use a Mac for that for some reason.
This video is literaly perfect
Thank you thank you!
Very informative. Thank you
Well explained and delivered.
Luckily my exhaust system no longer has a catalytic converter. 😂😂😂
It's not legal anywhere +nunchaks700. It's okay to do the right thing, your neighbors appreciate it. :)
It's legal for my 63 ford ;)
Buy diesel trucks...not volvo.
I'll never run catless... it stinks when you come to a stop, and everyone behind you has to smell your exhaust. It's like being behind a diesel, but not as bad.
*Engineering Explained* It may not be legal, but some states (like NJ, where I am for example) are no longer doing emissions testing on normal vehicles 1995 or older as they do not have ODBII ports. So in a way, the car folk see this as making straight-pipes on older performance vehicles somewhat OK now, or at least "less-illegal" as the state is not proactively trying to enforce the legality of it. Those older cars ('95 and older) are now exempt from state inspections.
I installed a drop-in AEM air filter on my winter beater. Putting down so much power it broke the dyno
Loved the clips. The really help to justify your answers
Beautifully explained. Thank you for this video.
What about used camshafts? I have 20 yo car and it's camshaft is lower obout 2mm than a new one, what makes 15-20% loss of hight.
yes and wear on bearings , etc
Does the same rule apply to diesel engines, (perhaps worse)? I don't know, cars with petrol engines here depreciate like crazy, quite the opposite from the rest of the world I guess?
And I always wonder if that power could be returned with some overhaul on the engine?
Yes, everything except spark plugs, really. Diesels have different exhaust systems as well.
If you struggle with power loss in a diesel, I highly suggest you replace the fuel pump, as diesels run with higher fuel pressure and as a result, you'll have more wear on the fuel system over time.
Engineering Explained can you make another video specific to diesel engines?
Hmmm, some of my mechanic friends did told me that the Fuel system is the first thing to go wrong on a diesel engine. (not to mention that the engine that I have, Isuzu's 4JX,1 is quite problematic.) Well I guess I'll have to save up for a Subaru.
as my father thought me deposit is a high chance if you drive the car "carefully" personally i got a big very noticeable increase after i hooked the caravan behind my volvo 740 2,3L petrol and went on a weekend trip, high load over time means the engine basically cleans the deposit of it's own, also if deposit is stuck on the valves this will work fantastic. the exhaust system will also be allot hotter and will remove deposit of it's own.
Great presentation!
Great video and great channel! Very helpful stuff!