Oil in intake manifold

GM Guy

Full Member
Joined
Jun 20, 2011
Messages
108
Likes
0
Points
16
#1
Make
Olds
Model
88
Year
1996
Miles
166k
Engine
3800
I replaced all intake manifold gaskets (Fel-pro) and the upper intake plenum(Dorman, I think) about 65k mi ago, when I bought the car for a to/from work car.
The car has always used some oil, but has started to use more than 1 qt/1000mi.
Last summer I had to replace the MAF sensor and while doing so, I looked into the intake and saw oil standing in the intake.(I removed the throttle body to replace the MAF sensor.)
At the sight of this I remembered that the old intake had oil in it also, but it was leaking oil and coolant externally.
My question is this; Is it normal to have oil in the intake of this engine?
 

grcauto

Hero Member
Joined
May 29, 2014
Messages
301
Likes
19
Points
18
#2
Is the PCV valve clogged open. You may b sucking oil throug there.