Gas leaking out of left tank at cap

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Jun 29, 2018 | 01:21 PM

glv1@comcast.net

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From: Michigan

Gas leaking out of left tank at cap

I have a problem with gas leaking out of my left hand gas tank on my 92 heritage softail if I fill it up and then park it. I have new stainless steel beauty rings around the mouth of the tanks with new caps.

Jun 29, 2018 | 01:59 PM

mmesa005

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From: Northern California

I suspect that fuel is flowing back up from the float bowl into the tank and out the cap as there is debris under the float needle valve. Could also be gas cap gasket/o ring?

Last edited by mmesa005; Jun 29, 2018 at 02:04 PM.

Jun 29, 2018 | 02:05 PM

Jackie Paper

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From: Honah Lee

Our your caps one way vented in? Is the check valve in the vent line mounted vertical and in correct direction with a slight resistance going out?

Jun 29, 2018 | 07:52 PM

glv1@comcast.net

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From: Michigan

Quote:

Originally Posted by mmesa005

I suspect that fuel is flowing back up from the float bowl into the tank and out the cap as there is debris under the float needle valve. Could also be gas cap gasket/o ring?

Just had the carb went through when I had it dynoed, Gas Caps are new but I will check the o ring. Thanks.

Jun 29, 2018 | 07:55 PM

glv1@comcast.net

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From: Michigan

Quote:

Originally Posted by RIPSAW

Our your caps one way vented in? Is the check valve in the vent line mounted vertical and in correct direction with a slight resistance going out?

The cap on the left isn't vented but the one on the right is, but I never thought about a check valve in the vent line, But if there was a check valve the gas could not get from the right tank to the left tank when needed. I don't think there is one.

Last edited by glv1@comcast.net; Jun 29, 2018 at 08:00 PM.

Jun 29, 2018 | 08:02 PM

RANGER73

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From: Beyond Fucital

Left is not vented, right side is.
If it’s leaking on the left side you’re over filling and you used the wrong rubber rings on the new caps.

Jun 29, 2018 | 08:21 PM

glv1@comcast.net

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From: Michigan

Quote:

Originally Posted by RANGER73

Left is not vented, right side is.
If it’s leaking on the left side you’re over filling and you used the wrong rubber rings on the new caps.

I thought that I might be overfilling, I know if I remove the left side beauty ring and put the cap on it stops leaking. I read on place to fill the left tank first then put the cap on the fill the right side, does it really matter or do you think am I just over filling. Do you know if anyone sells a little bit longer caps?