I have the typhoone upper and lower intake manifold. I removed the upper to polish it and notice alot of oil in the lower intake manifold. I also noticed alot of oil on the pcv valve... What could cause this?
A bad pcv valve and screen will cause it. If its clogged its sending oil thru the vacuum lines and running into the upper manifold. Replace it! Its only like $20
No prob. I had the same thing happen to mine when I replace manifolds and didnt get a new PCV valve. If you notice the vacuum lines that its hooked to feeds into another vacuum line that feeds right back into the manifold. Not a good thing if you have oil in there. good luck.
As far as I know, the intake always gets oil in it. Mine had to be lifted up to get at a vacuum line recently and there was a puddle in there. It hasn't been off since late 2001 so .