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Registered User
Join Date: Jan 2013
Posts: 25
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Oil filter change
Very quick dumb question, why is not possible to add oil to the small oil filter before installing.
New to 993 ownership, but have vw's & an older 911. Normally like to half fill any oil filter before installing, but unable to with the small filter! Why? - have I forgotten to remove something? |
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07-28-2013, 10:45 PM
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Registered User
Join Date: Jan 2013
Posts: 25
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Check valve! Stops oil flowing backwards after engine stops (Thanks to a old VW mech.)
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07-29-2013, 03:32 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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The filter flows from outside-in. Meaning, the oil is pushed thru the small holes around the perimeter of the filter, flows across the filter media into the center of the filter. Then flows out from the center into the threaded fitting that accepts the filter onto the engine.. When you pre-fill the filter, you are actually putting the oil on the discharge side of the filter. So you're filling the filter up with oil, yes, but it's not being passed thru the filter.
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Kevin L '86 Carrera "Larry" |
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08-06-2013, 01:57 PM
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