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By Deyomatic - 3 Years Ago
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The engine in the car is a 292 out of a '59 Fairlane- the previous owner modified the oil filler cap to allow a fuel pressure gauge to fit.
I want to get another one- are they all the same for Y blocks? I just want the stock one. Any recommendations?
Thanks.
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By PF Arcand - 3 Years Ago
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Some caps are not same as originals, particularly the small often chrome plated ones. I bought a std size one some time ago that was marked Autolite if I recall. Concours Parts listed a Black repro #6766 - CR some time back. Also a Chrome plated one for T.Birds at a higher price.
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By Ted - 3 Years Ago
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All the oil tubes for the factory valley covers for the Ford Y are the same diameter so any year Y-Block oil cap is expected to work. The tubes are also the same O.D. as the FE Ford so that helps. Some of the aftermarket valley covers for the Ford Y use a different sized oil tube which will require a different oil cap.
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By Joe-JDC - 3 Years Ago
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Don't get the cheap $9.99 ones. The spring clips break and fall into the fill tube. They are junk. BTDT. Joe-JDC
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By DryLakesRacer - 3 Years Ago
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Mine has a Stant with a 1/2” hose fitting which I have going to my air cleaner on the inside of the filter. I used it that prior to the PCV system to reduce engine smell. The PCV system should be filtered on the intake side. The Stant was gray/silver color with the ID number in the center on a paper decal. It was old when I found it.
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By bird55 - 3 Years Ago
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Have any of you guys used a K&N crankcase filter for your filler cap? I've seen them used on our y-block engines but never actually heard if they are useful in this application? Pricey, I know by comparison.
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By DANIEL TINDER - 3 Years Ago
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Theoretically, the more effective the filtration, the better it is for engine life, though if overly restrictive it might somehow effect PCV function (?). The spring-mount caps (like orig.) allow too much unfiltered air to pass around the tube-to-cap fit, though if too tight it can make adding oil rather troublesome.
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By FORD DEARBORN - 3 Years Ago
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Many years ago I purchased the reproduction breather cap for T-birds because it has a dense foam filtering media inside similar to what many small engine air filter are made of. By adding one drop of motor oil in each hole helps collect and hold airborn dust. It gets cleaned in mineral spirits every yeart and reused. The fit on the oil filler tube is very good, like, better than most. Judging by the dirt that comes out of this cap I'd say it works great and no need for a closed cap piped to the engine air filter housing. Just my 2cents............
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By Deyomatic - 3 Years Ago
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Nice. Thanks for the info. I put in an order for one from Dennis Carpenter...and good call on the FE, Ted. I had a MAJOR brain fart and was about to "SUBMIT" my order for one for a 1958-1965 (?) Thunderbird when it dawned on me that Ford SLOWLY killed the Y block starting with the T Bird and that this would have been an FE. I was thinking that my engine was from a '59 Fairlane. I knew better. I guess it wouldn't have mattered anyway.
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By paul2748 - 3 Years Ago
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Mummert lists a few different caps on his web site in conjunction with his aluminum covers.
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By panel driver - 3 Years Ago
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I have the one from K&N. I like it. Just have to measure the tube to get the right diameter. I like the deflector shield built on to it.
Especially when the fan clutch locks up.
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By DANIEL TINDER - 3 Years Ago
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BTW: Just noting an odd quirk: If I remember correctly, the earlier OEM models had a shield, but when it was done away with (deemed unnecessary and another way to save of few pennies per car in production costs?), the stamped directional orientation instructions in the top cover remained on the stock cap, resulting in much puzzlement.
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By paul2748 - 3 Years Ago
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Those were pretty much a holdover from the flathead days. No rhyme or reason to have the shield that I can guess.
DANIEL TINDER (1/14/2022)
BTW: Just noting an odd quirk: If I remember correctly, the earlier OEM models had a shield, but when it was done away with (deemed unnecessary and another way to save of few pennies per car in production costs?), the stamped directional orientation instructions in the top cover remained on the stock cap, resulting in much puzzlement.
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By PF Arcand - 3 Years Ago
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Yes, there was a reason for what is being called a shield here. It was a Deflector, intended to direct ventilation air into the engine. For some reason it was deleted on later engines & keeping the oil cap " filter clean" apparently wasn't really emphasized, leading to many sludged up engines.
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By panel driver - 3 Years Ago
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I just thought is was a good idea, to keep the road dirt coming though the fan to go directly on the K&N filter.
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