Leaking intake manifold
Hello I have a 1988 gulfstream sunvista hi rise on a john deere chassis with a 460 ford motor. Over this past spring while on a trip I found the oil was leaking from the rear and front of the intake m...
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One other idea. When you have the intake and exhaust manifolds off, run a leak down test on the low cylinders and listen to the exhaust and intake ports. If you can hear escaping air, it is definitely the valves. If not could be head gasket or rings. Also check you radiator for oil. If there is a leak in head gasket between water and oil passages, you will have oil in your antifreeze, If the intake manifold is leaking water through the gasket, you won't. There is no pressurized oil passage in the intake manifold, but it could possibly leak water into the valley where it mixes with the oil.
