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Old 04-10-2023, 12:24 PM   #17
alexiskai
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Location: Mebane NC
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Default Re: Model A oil filter test

Quote:
Originally Posted by goldie View Post
As per Paul Shin he suggested drilling out the backflow gasket. I instead cut slits with exacto knife.
With the full-flow kit, it doesn't much matter whether you puncture the anti-drainback membrane or not, because the entry port from the pump is at the top of the filter. So there's nowhere for oil to go, whether it drains back out through the membrane or not. However, technically there is very little evidence for the practice of puncturing the membrane. If you want to be extra certain, use a filter with a silicone (red) membrane instead of the nitrile (black) membrane seen in the video. Nitrile membranes can sometimes harden if left in place for years.
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