2001 F150 4.2 Manifold Oil Leak
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Joined: Nov 2012
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2001 F150 4.2 Manifold Oil Leak
I have a 2001 4.2 and have oil leaking from the lower plenum next to the coolant lines on the right side first lower plenum bolt.
Oil seaping from lower plenum one inch to the left of the lower plenum front right bolt. Its pooling in that pit..Possible lower plenum cracked? Right behind the coolant line
Seeping right next to the fat coolant hose going into the lower plenum that connects to the coolant Y pipe
http://images.oreillyauto.com/parts/...15-270-007.jpg
See the 90 degree coolant elbow, oil is seeping out in that pit, I also see oil in the coolant(No coolant in oil as oil has higher pressure)
Is there any oil sources there or is likely the manifold is cracked?
UPDATE: I found the CRACK, lower aluminum manifold has one inch crack
Oil seaping from lower plenum one inch to the left of the lower plenum front right bolt. Its pooling in that pit..Possible lower plenum cracked? Right behind the coolant line
Seeping right next to the fat coolant hose going into the lower plenum that connects to the coolant Y pipe
http://images.oreillyauto.com/parts/...15-270-007.jpg
See the 90 degree coolant elbow, oil is seeping out in that pit, I also see oil in the coolant(No coolant in oil as oil has higher pressure)
Is there any oil sources there or is likely the manifold is cracked?
UPDATE: I found the CRACK, lower aluminum manifold has one inch crack
Last edited by burts; Nov 14, 2012 at 12:05 AM.
Senior Member
Joined: Jun 2006
Posts: 4,719
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From: Maricopa, AZ
Looks like my girlfriend's truck is having a similar problem. Oil in the same spot and appears to be coming from the lower plenum and manifold gasket. Sure hope its not cracked. We don't see any oil in the coolant or vise versa though. Getting ready to pull the lower plenum now.