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Oil Filter anti-drainback Valve (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Bob on December 29, 1999 at 10:46:51:

Does anyone know if the M30 engines (3.0, 3.2/3.3, 3.5) incorporate an anti-drainback check valve in the oil system (possibly in the oil filter housing)?

I find that my oil filter canister is being siphoned halfway empty when the car sits a while, resulting in a very slow-to-go-out oil pressure warning light since the oil filter has to be refilled before oil pressure is restored.

This is happening on my 535 as well as my 633, and I suspect on other e23, e24, e28 cars that I see with "slow" oil pressure (not due to internal engine wear).

Bob


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