Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

How many here have had a head gasket failure?

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Old Sep 7, 2011 | 10:18 AM
  #21  
fireman-1781's Avatar
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Joined: Aug 2011
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From: Mountain Home, NC
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Where is a good place to order my hg's ? Do I have to replace my injected seals as well?
 
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Old Sep 11, 2011 | 01:39 PM
  #22  
dieselgooroo's Avatar
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I got a dmax with 170000 bone stock with a k&n. I have had no problem other that a alternator, and some u joints. I also use it as a snow plow truck so its been ran good. I think the key to getting this trucks to run forever is to leave them stock. Yea i know that's boring and that's why i have begun my upgrading by ordering exhaust.
 
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Old Oct 6, 2011 | 11:43 PM
  #23  
Prebanned's Avatar
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Default BLOOOOOWN

215000 miles when I bought it and the gaskets are just barely blown, I figured it out when I tried to check the coolant in the morning and it came gurgling out like there was a big bubble of compressed gas in the engine.
Dang it!
 
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Old Jan 22, 2015 | 09:37 PM
  #24  
caveman4867's Avatar
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From: North Dakota
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Just had mine done 137000,Headgaskets and waterpump,5 grand at the stealer,Hurt like a SOB,But ya gotta do what ya gotta do
 
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Old Jan 26, 2015 | 11:30 AM
  #25  
65rustang's Avatar
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From: eastern PA
Default Head gaskets done at 125k

I went round and round with the dealer that my head gasket was blown and they kept telling me that there tests say they are fine. One monday morning a buddy of mine helped me tear into it,found 4 of the 8 cylinders were failing right around the ring of the cylinder.I gave him a few bucks and still had almost 3k into it. Oh that included the water pump.Back up and running wednesday after noon.
 
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Old Feb 6, 2015 | 02:02 AM
  #26  
detroitdiesel idi's Avatar
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Joined: Nov 2012
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From: michigan
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this thread is so old
 
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Old Feb 10, 2015 | 12:30 AM
  #27  
greenbomb's Avatar
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From: Hardy Arkansas
Default head gasket

anyone take the front fenders off to change the head gaskets
 
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Old Apr 6, 2015 | 12:15 PM
  #28  
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136k and I'm just about to replace mine.
 
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Old Apr 6, 2015 | 03:11 PM
  #29  
dieselrick's Avatar
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Joined: Dec 2012
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From: 4 Corners, USA
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The gaskets don't really blow out, they just move around due to aluminum heads, then they start leaking. Even unmodified engines will do it.
 
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Old Mar 21, 2021 | 11:16 PM
  #30  
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So....
 
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