C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Jun 17, 2021 | 05:17 PM
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Default Fuel Leak

Ive read that if you fill the gas tank all the way up, you get a fuel leak behind the front left tire caused by a release valve or overfill valve? Is this true? I filled up my tank to the tippity top last night and today I have a leak.
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Old Jun 18, 2021 | 11:26 PM
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Very possible. I never fill the tank further than the bottom of the filler neck for just that reason. With cars this old, the fuel separator gizmo back on the tank is likely faulty enough to allow raw fuel pass to the vapor recovery hose. If raw fuel gets to the vapor canister, it saturates the media and the excess just leaks out the bottom. If you see this ONLY after a fill-up, that is the problem. The solution? Don't fill it so full....
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