oil filter cap

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Aug 23, 2011 | 01:13 PM

keld

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Joined: Jul 2004

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From: Indiana

oil filter cap

Okay guys, I know this may seem ridiculous, but I have a silly question. Is the o ring on the oil filter cap supposed to be visible after you put the cap back on? I guess I never paid attention before when I changed it before. The o ring squeezed out twice on me this last time, and I had my brother helping me. He insisted it needs to be down inside. So he kept tightening it until it went in and the plastic ridge on the cap touched the metal. I was sure it was going to crack, but so far so good. He did the same thing to the fuel filter cap. I need to find out so I can back it back out if I need to, before it breaks. I've not had problems with leaks before, but this time has been a pain in the butt. thanks in advance for any help on this

Aug 23, 2011 | 01:16 PM

renfrizo

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Pretty sure if you can see the O-ring, it's not doing it's job. Plastic to metal is correct. Torque spec for the cap should printed on the top of it.

Aug 23, 2011 | 01:20 PM

keld

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From: Indiana

Thanks...I thought the o ring was squeezed between the cap ridge and cylinder that created the seal, guess maybe I was wrong. I just didn't remember having to crank it down so hard the last time I changed it.

Aug 23, 2011 | 01:38 PM

Unrealo4

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From: Eagle Mountian, Utah

If you are using a aftermarket filter in a oem cap. It would feel like you cranking on it. Are you using a motorcraft filter?

Aug 23, 2011 | 02:05 PM

keld

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From: Indiana

Yes it was motorcraft. I bought the truck used a few years ago. I used an aftermarket filter the first time, but this time I bought motorcraft.

Aug 23, 2011 | 04:09 PM

dhag911

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Joined: Jul 2003

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From: Lincoln, Nebraska

is it a ford cap? when i bought mine it had a napa cap on it and it was really hard to turn

Aug 23, 2011 | 04:18 PM

npccpartsman

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Joined: Dec 2003

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From: Stuttgart, Ar

The o-ring should NOT be sticking out. It goes down in the housing just a bit, not right under the lip of the cap. A new o-ring comes with every filter because the old o-ring will swell and not fit correctly.