Head gasket leaking? - Chevy and GMC Duramax Diesel Forum
06-07.5 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 12-07-2010, 06:06 PM   eBay Motors  #1 (permalink)
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Head gasket leaking?

ive got a 06 LBZ that I bought in august and has been great! put it on the lift at work about a month ago and looked over everything and noticed oil leaking from the rear of the passenger side head right where the head and block meet. now i checked everything and ive got no symtoms of a blown head gasket. I cleaned the oil off and checked it last week and still wet around it with oil. anyone experience this before or know what i can do?
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S&B intake
5" exhaust
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EGR delete
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Old 12-07-2010, 06:10 PM   eBay Motors  #2 (permalink)
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Might be the PCV syatem dumping oil into the Turbo and pushing it out-- common to have oil in the boost system. You can reroute the system and the engine will stay cleaner!

Also another possibilty is a leaking valve cover gasket, or a turbo drain tube. You need to inspect it closer.
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Old 12-07-2010, 06:12 PM   eBay Motors  #3 (permalink)
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man i don't know, i would think it would be coolant not oil comin out, since the coolant would get through easier, are you sure it's not comin from somewhere else and just collecting there? could be the egr leaking or something. i don't know though sorry.
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Old 12-07-2010, 06:19 PM   eBay Motors  #4 (permalink)
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ive got the pcv reoute and egr block. i used brake cleaner and made sure it was all clean and dry a month ago and its wet right where the head and block meet.
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06 LBZ
12.8 1/4
EFI live DSP5
transgo jr
S&B intake
5" exhaust
Fass 150
EGR delete
PCV reroute
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