OIL BLOWING OUT THROUGH UPPER PLENUM

wb's87

willrock
Joined
Apr 7, 2010
I was at the dragstrip last Friday. I normally run 24# of boost. I made a run and the boost gauge only went to about 15#'s upon inspection I noticed some oil in the area where the upper plenum mates to the manifold. I am assuming I blew the plenum gasket. But my question is why all the oil? Where could it be coming from? Also is it common to blow the plenum gasket? I have the RJC power plate and when I assembled it I used 3M weatherstrip and gasket adhesive on all 4 surfaces. The plenum was torqued properly to spec.

TIA for all feedback and comments


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Oooh. That's not good. I just took a couple pics. You can see where the oil is running down between #3-5 injectors and on the valley pan. I made another run after I saw this problem and boost was back to normal 24#'s I don't get it.


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Plenty of videos on Youtube ;)

I think the oil on the intake and low boost are unrelated. Check the wastegate.

Rick
 
Have you checked that EGR? Looks to be leaking in the pic. Maybe that's where your leak is coming from under high boost. Upon second inspection, actually just looks like the rtv sealant just squeezed out and not dirty. Nvm.
 
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