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Old 01-03-2014, 10:03 PM
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Trouble Finding Oil Filler Cap That Fits

So I have an 87 YJ, and have bought two different filler caps, anybody have any idea what size cap to ask for with this? I've got the one for 4.2l then today I got one for 4.0l

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Old 01-04-2014, 09:34 PM   #2
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Old 01-07-2014, 09:18 PM
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I tried that one and also the one for 90 and up, none worked, any ideas? This is what it looks like straight on.
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Old 01-07-2014, 11:33 PM   #4
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Do they not screw in or are they just not tight enough to keep oil from leaking out??

If they fit but leak. Try making a rubber washer use an old by cycle inner tube. They throw them away at bike shops. It may be just enough to stop the leak. I did works great.
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Old 01-08-2014, 02:12 AM
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It just won't fit into the hole on the head. Both ones I tried are just too big
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Old 01-08-2014, 07:55 AM   #6
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Isnt that hole for the tube that goes to the air cleaner housing ? I already see an oil filler cap to the rear of that hole.
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Old 01-08-2014, 08:28 PM   #7
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I think that hole is for either the CCV or PCV valve.
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Old 01-09-2014, 07:42 AM   #8
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Quote:
Originally Posted by warren544109 View Post
i think that hole is for either the ccv or pcv valve.
x2

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