Mazda MPV This minivan was among the class leaders with its roomy interior and efficient powertrain.

Oil leak somewhere on the top end

Old 02-20-2009, 12:35 PM
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Join Date: Dec 2006
Posts: 5
Default Oil leak somewhere on the top end

Hi all,

I am hoping for some sage advice.
My 1994 MPV 3.0 4wd has developed an oil leak somewhere on the top side of the engine.
I shampooed then engine to see if I could isolate the source of the leak but so far have been unsuccessful. Currently the oil pools at teh front end in a depression between the distributor(?) and the valve cover and in the same spot on the back side between the valve cover and the block out for where I am thinking the distributor would go if the engine were rotated 180 degree through the horizontal plane.
Is this a common problem?
Could it be a warped valve cover?

The oil tends to drip on a heat shield near the firewall and the fumes enter the cabin when the defrost is on. It is not a significant amount of oil but annoying when the windshield is foggy.

Thanks in advance,
Old 02-20-2009, 05:37 PM
Senior Member
Join Date: Aug 2007
Posts: 1,324

The passenger side cyl head distributor blind plug o ring and pcv housing o ring leak where you describe. The same on the drivers front where they use o rings.
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