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

Coolant problems

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Old Jan 2, 2012 | 08:22 PM
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GTRW3T's Avatar
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From: MIDDLESEX COUNTY
Default Coolant problems

Ok everyone
I've got a 2004 lly... I just installed a new water pump onto truck bout 2 months ago along with new thermostats. Well it's been going on now for bout a month now that it will spit coolant out over flow and hold pressure on system for days. I have also been smelin coolant lately also but can pressure test and can't find any leaks..... Ive been reading some stuff and I got a bad feeling that the hd gaskets are gone but it's never gone above 210. Some one said it could be the egr. Hope yawl can help

---AutoMerged DoublePost---

Could a bad rad cap make it hold pressure for a period of time like that?
 

Last edited by GTRW3T; Jan 2, 2012 at 08:22 PM. Reason: Automerged Doublepost
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Old Jan 2, 2012 | 09:59 PM
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have you tried pressure testing it with it running? kinda sounding like blown headgaskets
 
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Old Jan 3, 2012 | 02:46 PM
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no ive not tried that yet... ill have to try that when i get home tonight. and if it is headgaskets the truck will be sitting for a while cause aint got the money to fix that at the moment in time....
 
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