All About the L5P Duramax Engine! | 4 Common Problems
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- เผยแพร่เมื่อ 12 ธ.ค. 2022
- Boosted Performance is now LIVE! L5P Performance Parts: boostedperformance.com/durama...
In this video, Jake covers GM’s L5P Duramax engine. Could it be the best GM diesel engine? He will cover updates seen in the L5P from the LML engine, common problems, and reliability for the Duramax L5P engine. The article linked below, written by us, is a more in-depth guide on the common problems with the L5P Duramax: chevytrucks.org/duramax-l5p-e...
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00:30 - GM Duramax L5P Engine Background & Updates
01:25 - L5P Duramax Common Problem #1 - MAP Sensor
02:35 - L5P Duramax Common Problem #2 - #4 Fuel Injector
03:36 - L5P Duramax Common Problem #3 - Diesel Exhaust Fluid (DEF) Heater System
04:18 - L5P Duramax Common Problem #4 - Transmission
05:32 - Other L5P Duramax Common Problems
06:26 - L5P Duramax Engine Reliability - ยานยนต์และพาหนะ
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Wow. Awesome info. Input. Thks
Marty - Thanks for the feedback! We hope it helps.
Great video thanks. Subscribed!
M - Thanks for the feedback and support!
Good information and accurate until you mentioned the Allison 1000 as a 10 speed when in fact it is a 6 speed. The GM Built "Allison Certified" 10L1000 started in use on the 2020's is a 10 speed. Which one were you speaking about?
Jim - you're correct, thanks for pointing this out! I misspoke and was thinking about the new 10L1000's.
Def heater is easy to work on till you can’t get your hands on the parts needed. Def lines are back ordered till next month all over. Lucky mine just went out and it seems like I’ll be walking to work for a month
Jerry - So sorry to hear this.. thanks for sharing this info. It’ll certainly be helpful to others down the road.
How about the crankshaft pins sheering off…..common as know!!!
J - Thanks for the insight.
No its not. You got that from daves videos and its is very rare. Usually happens to people that remove the balancer and do not tighten back to spec. Also usually from yahoos tuning the balls out of it. Any stock motor past 100 hp over stock is going to be very unreliable
M - Thanks for taking the time to share this insight!
My brother just bought a brand new 2023 duramax 6.6L, and admittedly I know very little about these engines. Are they relatively easy to work on? I was frightened by the immensity of junk covering the engine when I opened the hood. At least its good to hear that they are reliable.
Really depends what work you're trying to do on it - definitely not as easy to work on as the older diesels that have less emissions and electronic systems. Definitely a lot of stuff in there that limits accessibility so really depends on the job but getting to certain parts of the engine can require removing a lot of crap to get access.
Just wake up from a coma? Only drive ancient trucks? Vehicle engines have had junk covering the engines for the last 15-20 years.
sold my 15.5 LML for a 17 ford 6.2 gasser for business reasons but kinda wanna buy a 2016-2020 L5P as a personal truck since i miss my denali. thanks for the info man
PCG - Thanks for the feedback! Can't go wrong with either - LML or L5P. Both stout.
The key word here is maintenance! If you do your maintenance on your vehicles so promise they’ll last. Don’t run them hard unless you really need to.
J - 100%! Couldn’t agree more.
I installed a S&B redirect map sensor and took it off 2 weeks latter because i was loosing 4 miles per gallon on hwy..
N - Oh wow.. Sorry to hear that. Thanks for sharing!
DEF tank heater meltdown is a very common problem. My 2021 has had a new tank every winter since I got it. They replaced the whole tank each time. The last time it happened we just barely limped it to the dealership. After they fixed it I deleted. No more emission system problems.
C - This is true! Thanks for sharing your experience. We are big proponents of deleting emissions systems.. But we can't recommend it, legally.
@@8020Media yeah I hear you, I know things are much stricter in the USA. In Alberta we can delete them, but to be street legal the truck needs a muffler to keep the db at stock level. Some cities are strict with their noise bylaws.
C - Yep, exactly!
@@R3lyc Too bad this doesn't apply to stupid motorcycles reving over 10K middle of the night. My LML is straight pipe and never had any problems with noise in cow town
@@marcelo403polo2 it technically does, but it isn’t enforced often. Edmonton was on a big noise kick a few years back, and even tried a noise photo radar system at one point.
I have a 2017 dirtymax and it's like a old 6.5l turb. Very simple to wrench on just kinda tight quarters. Lol
Grinde - Thanks for sharing your experience!
I've got 2 6.5s still running in my fleet I actually thought about selling to buy a newer truck 😂 I got a 1993 and a 1999 with over 400k on each of them on miles and original transmission and 4x4 as well. I change the oil every 5 k miles the fuel filter every fall before it gets cold and I change the 4x4 and transmission fluid as well once every other year. And the differential fluid as well at that time. Every 5 years I trash the brake fluid because brake fluid does absorb moisture in the air. I also change the antifreeze as well at that time. Knock on wood I still have the original water pumps on both engines in each truck as well. I've never had any trouble other than those dumb silly PMD boxs for the electric injection pump for the newer 1999 isn't mechanical injection. I do tree service work so all in all I'm only fully loaded one way on weight I move 8-13k lbs. Loads daily with both of these trucks in south central Texas. Them old rear drum brakes feel so outdated 😂
Does this truck have cp4? I have a buddy who swears they have the cp4 but everything I’ve read says they switched over.
Blue - The L5P ditched the CP4 after the LML.
l5p is not a bosch system nippondenso, no cp4
I’m coming from a 19 Denali that I got rid of because of transmission and lifter failures , which I know a common issues when buying these GM 1500 trucks but I’m wondering do I deal with all of that on the 2500 model as well??
John - Yes they have been reported to see lifter failures.
Should have no trans issues.
2500 doesn;t use the afm-dfm so different lifters
what years are the l5p in ?
G - The L5P are 2017-2023.
You didn't mention the boost tube problem. I'VE blown 5!
Mike - Thanks for sharing this experience. This will certainly help future viewers.
Turn the burp down dumbass!!!!!!!!fgs!
Im gonna swap a lp5 duramax into my 06 chevy vortec max 6.0 soon
Haha share it with us once you do! Sounds like a beast of a swap.
You haven't mentioned the shitty gas mileage. Avery other diesel I've ever had could get 18 all day long hw or pulling. My lifetime is 14.1 mpg in my 18'
K - Thanks for sharing your experience and insight.
About the same as mine. I expected better.
L - Thanks for sharing your experience.
Yeah Ive had Ford and Gm, Ford wins by about 2 mpg. I think its the after treatment and the fact that GM piston stroke is shorter so it has to work a little harder to make tq.
Mine also is 14 mpg lifetime 43,000 miles so far , and park sensor went out and they’re back ordered
They have issues. Trans and engine failures.
M - Indeed they do.
Btw... early l5p owners.... I recommend upgrading to the banks engine oil cooler upgrade kit before you "tinker" with old gran dad! You'll thank me later.
Grinde - Great insight here and we totally agree!
Oil leaks like a mofo on 2024s
G - That's interesting. Not something we've heard of yet.
Mine is a piece of crap
C - So sorry to hear about this. What's going on with it or what problems have you experienced?
@@8020Mediaeverything you mentioned plus some. It’s currently consuming a ton of oil
C - Thanks for taking the time to share your experience.
@@8020Media looks like I have a main seal leaking so it’s headed in for warranty work this morning
C - At least you found the cause! Keep us updated.
So buy a cummins?
Lion - Just because we say the L5P had a few problems, doesn’t mean it is unreliable by any means. We’ve seen plenty of reliable chevy’s.
Would u recommend getting 2019 l5p ? 20k miles
John - We're big fans of L5P's, but we can't and won't recommend any vehicle to anybody. Just because we don't know what you are looking for out of a vehicle.
Cummins is probably, admittedly a better diesel engine, but there are a few problems with it, 1. It's not a V8, 2. The trucks they come in are junk, 3. Dodge puts garbage transmissions behind them. The L5P is still a good bet even with its minor issues.
We have many videos for the Cummins engine as well.
Loving my l5p!
Grinde - Thanks for sharing your experience!
I am looking to put an L5P into a '63 Impala. This is probably the best that Duramax has put out (so far) and i am looking to completely emissions delete this thing being that its going into a 1963 car. V8 Big Block power that should yeild about 25 mpgs or better in a 3800lb car. I'll have 2 tunes, one for smoke and power and one for fuel mileage. Its going to get driven all over the east coast. No trailer queen here.
Sounds like a sick rig you're building! Keep us updated on this.