Hey guys, i was on the dyno the other day and i noticed at the end of the pull when the throttle was closed it started smoking oil smoke fairly heavily .The car doesnt burn oil under any other circumstances,and if this is done in park or nuetral it does not occur. i read plugs very frequently and not a sign of oil.I only noticed it because i was outside the car for the first time after WOT.
Ive got a couple theories.1. when the throttle is closed at 6200,the large spike in vacuum as the blades close but the rpms are still up causes an intake gasket to slip in somehow letting oil in.2. ive got some sort of problem with valve seals or guides, though im stumped as to why it would be only AFTER loaded WOT.
I really dont think its rings because it doesnt smoke under any other circumstances,Ive built motors with loose rings and rebuilt ones with bad rings,and this is not the same symptoms.But this motor has seen its fair share of nitrous.
Just lookin for theories or opinions or wild *** guesses,anything to stimulate thinking on this problem.
Ive got FastBurns and a MiniRam3 with the correct gaskets BTW.
Thanks for the help!

 

Are the front Acces. bolt holes on the front of the engine blocked off/plugged? Down by the PS pump?

 

on my serpentine set up they are all used.

 

I think your valve seals are gone. There may not be enough vacuum at idle to cause a leak but after a wot pass and decellarating the vacuum is higher. Probably just sucking in some oil by the valve seals.

 

Thanks for the input slim and autoroc ..I need to put new springs on soon anyway, might as well put some Ti on.and im looking for an excuse to pull my junk cam.Might as well pull the heads and port+match em.The snowball has started rolling!
Any other ideas, suggestions,theories,experiences, wild *** guesses??

 

might as well pull your intake off. if you notice oil around your gaskets, and down your runners... then it was your intake gasket that took a dump. if you take off your intake and dont find anything... you need to pull off your heads. if both intake and exhaust valves are covered in oil, it's most likely your seals. if it's only the intake valve that's covered in oil, and your exhaust valve doesnt have any oil in the middle of it, then it was your intake gasket pulling oil through the lifter valley, down the runners, and into your cylinders. take a pic of your plugs... i bet you there's going to be a burn streak on them pointing towards the intake valve on some or all of them...depending on how bad the intake gasket was.

 

thanks dj.Figured i was gonna have to pull heads but wanted some reassurance/other ideas from all you guys,who are saying what i thought.I appreciate it.I was thinking about being lazy and just putting seals on[and springs cuz its time] but I dont like my cam so now im saving some $ and ill pull the top end, polish&freshen the heads and put new cam,springs and some ti in.Oh and some longtubes and a tune....and the 3.73s i got lying around..and///it never stops, yet never gets old either.