An easy way to verify that the oil filter housing cap is correctly tightened.

In an earlier post, I indicated that an easy way to correctly tighten the oil filter cap wrench is to mark it's position in relation with the aluminum oil pump casting, before removing it.

I've looked at several photos of the oil filter cap in the correctly tightened position and found an even easier method. It works even if it was incorrectly tightened during a previous service event.

Since the oil pump housing is "die cast," and the "injection molded" plastic filter cap has it's threads and startiong position of the threads in the identical position in all examples of the parts, the tightened positionm when correctly torqued will be in the identical or nearly identical position in every case.

When correctly tightened, the molded in word "open" in one of the recesses of the cap should past the bottom metal clip to be aligned within the next recess with no lettering.