Author Topic: Gas tank leak at gas cap  (Read 226 times)

Offline Cheyenne1010

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Gas tank leak at gas cap
« on: December 28, 2018, 12:19:22 PM »
I got a 1973 c10 longbed 350 engine with th350 transmission.so the problem im having with my gas tank is its leaking gas through the gas cap.when i accelerate or make a left turn gas leaks out.i put a brand new gas cap,locking type and non locking.has anyone experience the problem and is there a fix for it?

Offline VileZambonie

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Re: Gas tank leak at gas cap
« Reply #1 on: December 28, 2018, 06:25:57 PM »
check the seal and surface. Check the filler pipe and hoses. Is it overfull? Properly vented? Vented cap?
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Offline Cheyenne1010

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Re: Gas tank leak at gas cap
« Reply #2 on: December 30, 2018, 02:29:24 PM »
The gas caps that I've tried locking and non locking type have both been vented gas caps,and it leaks whether the tank is 1/4 full or 1/2 full.It leaks when I accelerate and all the gas as rush's towards the back of the gas tank where the filler neck is at and the distance between the gas cap and the filler neck opening on the gas tank is not very long. I'm going to inspect the opening where the gas cap goes to see if there's a lot of wear on the opening where it locks on to the tank.

Offline VileZambonie

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Re: Gas tank leak at gas cap
« Reply #3 on: December 30, 2018, 06:17:32 PM »
Sounds like a plumbing or tank vent issue.
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              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)