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-   -   Choice of oil filter on the M54 engines (https://xoutpost.com/bmw-sav-forums/x3-e83-forum/63052-choice-oil-filter-m54-engines.html)

martz 08-03-2009 08:29 AM

SAY what !!!!My understanding is an Oil filter is to filtrate the Oil and thus allow it to lubricate the internal parts of the engine. You are saying that an OEM filter holds the oil in it's canister so by doing so it does not allow it to flow and lubricate?

JCL 08-03-2009 11:58 AM

Quote:

Originally Posted by martz (Post 646955)
SAY what !!!!My understanding is an Oil filter is to filtrate the Oil and thus allow it to lubricate the internal parts of the engine. You are saying that an OEM filter holds the oil in it's canister so by doing so it does not allow it to flow and lubricate?

You are correct in that the oil flows through the filter. It flows in one direction. Then there is the check valve, or anti-drain back valve, that stops the oil from flowing back to the sump when the engine is shut down. That valve can be in the filter or filter housing, depending on the model. If it is not functioning correctly, there will be no oil in the filter on startup, and until the oil makes it through all the passageways you will have the equivalent of a dry start.


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