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09-14-2022, 08:31 PM | #1 |
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Join Date: Jun 2022
Posts: 87
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Oil filler tube cap question.
Is the cap supposed to have a filter in it. I always thought that it did but was told that it's not. It's been a long time since I owned a car that had an oil filler tube with a cap, but I thought that they had a filter that you had to clean sometimes.
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09-14-2022, 09:12 PM | #2 |
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Join Date: Jun 2014
Location: Land of Lincoln
Posts: 3,114
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Re: Oil filler tube cap question.
Not originally, it could be an aftermarket, if it works for you clean it and use it.
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09-14-2022, 09:14 PM | #3 |
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Join Date: Jun 2019
Posts: 131
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Re: Oil filler tube cap question.
Do not restrict oil filler tube, also known as crankcase breather. Restrict and blow oil out rear main.
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09-15-2022, 03:45 AM | #4 |
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Join Date: Oct 2012
Location: Portsmouth, Virginia
Posts: 303
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Re: Oil filler tube cap question.
Just slip a sock over the cap and tube.
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09-15-2022, 07:27 AM | #5 |
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Join Date: Jun 2022
Posts: 87
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Re: Oil filler tube cap question.
I removed the material that was in the cap, which was full of oil and probably didn't allow air to pass through it. The reason that I removed it was because I was having a lot of oil blowing out of the rear of the motor when it was running. I haven't had the chance to see if it helped but will let everyone know.
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09-15-2022, 10:50 AM | #6 |
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Location: Waxahachie, Texas
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Re: Oil filler tube cap question.
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09-15-2022, 02:39 PM | #7 |
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Join Date: Apr 2019
Location: Mt. Pleasant, SC
Posts: 601
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Re: Oil filler tube cap question.
Consider buying one of the ‘Fumaze’ caps with flexible hose. I’ve used these on A’s for years and have been very pleased with them. They do not restrict air flow from the crankcase, but direct all fumes under the the floorboard of the car and eliminate odors and oil mist on the firewall.
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09-15-2022, 05:41 PM | #8 |
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Join Date: Jul 2010
Location: Cow Hampshire
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Re: Oil filler tube cap question.
And don't necessarily "push" the cap until it stops when you put it on the tube. Many modern "repop" caps don't have ear placement to keep the cap from getting "real close" and closing off the vent.
You can examine your cap to see where the "stops" are. Joe K
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