Gas cap help
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Tuned
Joined: Apr 2007
Posts: 294
Likes: 30
From: VA
Gas cap help
Need some help finding the correct gas cap for my truck. Went to a cruise in and mine got swiped.
1974 Ford F100 aft mounted fuel tank with emissions. I have ordered 2 from Oriellys with same results with vented cap. I need the non- vented cap with the deep cam. I even drove 2 1/2 hours away to Dennis Carpenter to get one and they only had the vented cap. LMC is showing one but I hate to order something then if its not right, having to go thru the trouble of shipping it back. Going to try a couple of J.Y. tomorrow but last time I was there they had crushed the older Fords. Thanks for the help.
1974 Ford F100 aft mounted fuel tank with emissions. I have ordered 2 from Oriellys with same results with vented cap. I need the non- vented cap with the deep cam. I even drove 2 1/2 hours away to Dennis Carpenter to get one and they only had the vented cap. LMC is showing one but I hate to order something then if its not right, having to go thru the trouble of shipping it back. Going to try a couple of J.Y. tomorrow but last time I was there they had crushed the older Fords. Thanks for the help.
Laughing Gas
Joined: Apr 2016
Posts: 858
Likes: 118
From: Buffalo NY
Fleet Mechanic
Joined: Sep 2014
Posts: 1,626
Likes: 78
From: NE Texas
Bought a locking cap from O'Reilly's, at the time did not know whether it was vented or unvented. Sales guy said to just buy a cap with the same number of latching lugs as my original. I did and it has worked fine for over a lustrum (hat tip to John Wayne.) Where you get in trouble is when you replace a vented system cap with an unvented and eventually create a low-pressure 'vacuum' in the tank. I would think if you use a vented cap, your system (even though presumably emissioned, hence vented from the tank to the carbon cannister) you would be OK. Maybe a stray fume or two?
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ceetwarrior
1967 - 1972 F-100 & Larger F-Series Trucks
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Jun 1, 2004 05:46 PM
