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[GMCnet] Gas Tank Fill Leak [message #315633] Sat, 08 April 2017 08:56
glwgmc is currently offline  glwgmc   United States
Messages: 1014
Registered: June 2004
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Senior Member
Rescue tape. This silicone tape has no glue, rather it simply sticks to itself when stretched. Wrap that around the hoses and joints near where you think the leak is. Might seal it up long enough to get to the place to drop the tanks and do the job correctly.

Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR

glwork@mac.com
http://jerrywork.com
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Message: 1
Date: Fri, 07 Apr 2017 18:31:00 -0600
From: A.
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Gas Tank Fill Leak
Message-ID:
Content-Type: text/plain; charset="utf-8"

Today we drained all but 12 gallons of the 5 year old gas and added some SeaFoam to prevent sticky valve problems, and 20 gallons of ethanol gas to
absorb as much water as practical. We drained 10 gallons and added 20, less what leaked on the ground, which I guess was less than a gallon.

While adding the 20 gallons of gas from 5 gallon cans, after the first 10 gallons, we noticed A LOT of gas running onto the ground and it seemed to be
coming from the junction of the fill tube to the front tank. It leaks while we are putting gas in, and stops shortly after we stop filling, but
doesn't seem to loose all the that was added.

We tried funneling the gas in a way that it stayed in the center of the fill neck, and not into the vent part, with the same leakage.

Again, it doesn't seem to leak all the gas out that we put in. It leaks while we are filling, and stops a little while after we stop. We repeated that
test a couple of times.

If it was actually leaking from a fill tube connection, wouldn't it keep leaking until all the gas we put in leaked out? I don't think it is doing
that. More like it leaks before the gas from the rear tank (where it wants to go) equalizes with the gas in the front tank.

The level in the tanks is definitely higher than the fill line all the time, yet it doesn't leak all the time, only when gas is being added.

What could be causing it?

The prospective new owner is planning to replace all the rubber lines (fill, vent, engine, Onan, liquid/vapor separator and vent canister), but this
is not giving him confidence that he can drive it to where that job can be done. This has the makings of a deal breaker, and I want to keep this
"sale" on track.

Thanks in advance for suggestions.
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"When I grow up I am going to be a curmudgeon.”
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Jerry & Sharon Work
78 Royale
Kerby, OR
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