Oil coming out my EGR?
Registered User
Joined: Dec 1969
Posts: 4,950
From: San Diego, CA
It's common for oil to be sucked into the intake via the TB tube that runs to the passenger side valve cover. It can also come from a faulty PCV. Over time oil accumulates in the intake. When you tipped it up on end, it ran down to the EGR.
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Registered User
Joined: Dec 2001
Posts: 726
From: Glendale, AZ
Yes but my car hasn't been ran in 3 weeks. There shouldn't have been any oil up in there...
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Oil doesn't evaporate.... it can puddle and sit there forever. But I'm not so sure about the theory that it leaked out the EGR hole because the manifold was hanging vertically. There is no direct connection from the back of the manifold to the EGR port. The EGR port is routed under the bottom of the manifold, and I think it combines with the idle air at the front of the manifold. That would mean that the idle air passages were full of oil. That would be possible if there was excessive flow of air out of the passenger side valve cover to the top of the TB, with the oil actually dripping down directly onto the idle air port between the throttle blades. But then you would have had idle problems if the idle air passages were filled with oil.
Pull the top plate off the throttle body and see if its full of oil.
Pull the top plate off the throttle body and see if its full of oil.
Registered User
Joined: Dec 2006
Posts: 276
From: Tallahassee & Jupiter,FL
Oil doesn't evaporate.... it can puddle and sit there forever. But I'm not so sure about the theory that it leaked out the EGR hole because the manifold was hanging vertically. There is no direct connection from the back of the manifold to the EGR port. The EGR port is routed under the bottom of the manifold, and I think it combines with the idle air at the front of the manifold. That would mean that the idle air passages were full of oil. That would be possible if there was excessive flow of air out of the passenger side valve cover to the top of the TB, with the oil actually dripping down directly onto the idle air port between the throttle blades. But then you would have had idle problems if the idle air passages were filled with oil.
Pull the top plate off the throttle body and see if its full of oil.
Pull the top plate off the throttle body and see if its full of oil.
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
I could be normal... there always seems to be some "backflow" in the line from the passenger side valve cover to the throttle body. Ideally, the PCV is pulling a vacuum on the crankcase, and air is flowing from the TB to the valve cover through that line. But at times of low vacuum and high blowby (WOT) its possible for the flow to reverse, entrain oil droplets and put them into the top of the throttle body. If the accumulation is excessive, it may point to a non-working PCV system, or excessive blowby on the piston rings. Or it could be the baffle in the valve cover is missing.
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