Ok, here is the build, 05 Serria Denali, LQ9 Speed TU1 cam 225/225 113LSA .581" .581", PT70GTS turbo. I have a really bad intermitten issue with it burning oil. It will most of time happen when slamming on the brakes hard or driving for 10 min or more, stop at the gas station, shut the engine off for only 10 sec and restart, the truck will clear out the station with smoke. When it is smoking really bad, you can stall it up slightly into boost and the smokes stops instantly. normal driving is usally find until you come to a faster stop. Never smokes at WOT at all or at any point while accelerating.

Thoughts?

 

thinking valve seals

 

Smoke on warm startup, but then clears out = valve oil seals 99% of the time.

 

thats it!!, warm start only, cold ok, have a new set on the way

 

My car does the same thing on occasion. Replacing the heads anyway this winter

 

Yeah, you will also get smoke on deceleration sometimes because vaccum is highest with the throttle closed and it pulls the oil past the valve seals. Then when you romp it, it puffs and clears out.

 

Mine did the same, smoked at startup and randomly at other times. But thats strange that it doesn't make a nice cloud at WOT, mine would put out a nice blue cloud. Replaced valve seals fixed it all though

 

Just did the valve seals today, epic failure, no change what so ever, next step is the turbo, have some shaft play and does not spin really freely, don't really have Nything to compair it too but that is the only thing left. All the header tubes were clean and the plugs looked completly fine.