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Old 03-30-2009, 08:24 PM
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Oil filler cap

Does anyone know of a good brand of an oil filler cap that's on top of the valve cover. Everyone that I get from local stores always leak. Any help would be appreciated. Thanks.
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Old 03-31-2009, 08:16 AM
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Re: Oil filler cap

go to a junk yard take one off a motor, pay a dollar for it and be done.
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Old 03-31-2009, 03:29 PM
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Re: Oil filler cap

Yeah but depending on how long its been sitting up the the gasket will most likley be gone because thats what the problem has been. Not sealing properly.
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Old 03-31-2009, 09:57 PM
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Re: Oil filler cap

Sounds like your problem may be elsewhere, like too much crankcase pressure and/or blowby. Too much crankcase pressure will blow oil out the path of least resistance, like the oil fill cap, valve cover gasket, rear main, dipstick, etc. Make sure the PCV system is working correctly, and maybe consider a compression and leakdown test.
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Old 04-01-2009, 09:09 AM
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Re: Oil filler cap

oil filler cap does not have a seal, you have motor issues, do as BH suggested
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Old 04-01-2009, 11:05 PM
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Jeep :
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Re: Oil filler cap

No actually there is a rubber gasket on this oil filler cap. Hey Bounty Hunter, could those lines some how get clogged ?
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Old 04-02-2009, 10:59 AM
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Re: Oil filler cap

Yes, or collapsed, or the PCV valve clogged.
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Old 04-02-2009, 04:01 PM
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Re: Oil filler cap

maybe they changed in 91, no seal on mine.
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Old 04-03-2009, 05:02 PM
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Jeep :
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YJ Wrangler
1990
4"
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Posts: 54
Re: Oil filler cap

Canged the PCV and all the hoses and now everything's good. Thanks for the help guys.
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