| fuel selector valve [message #331925] |
Thu, 10 May 2018 17:45  |
pzerkel
Messages: 212
Registered: September 2007
Location: Salisbury, IL
Karma:
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Senior Member |
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I has suspected I had a gas leak. I confirmed that today, and discovered it appeared to be coming from the fuel selector valve. What is the failure mode of these. After I started the coach and ran it from the main tank for a few minutes, gas kept dripping out at the valve.
I was not sure if it was the valve itself or the hoses going into it. A few years ago I replace all the rubber hose from the selector valve to the fuel pump with Gates Barricade, and all that appears to still be in good shape. The leak in my case appeared to be coming from the top connector input into the selector valve. Which is plumbed to the main (rear) tank.
What surprised me was when I took that hose off the top input connector, gas kept coming and coming from that port on the input to the selector valve. What I did as a quick fix what put a short plugged fuel hose onto that input. But of course then I could only draw fuel from the aux tank.
My question: is this normal behavior of the fuel selector valve when one input hose is disconnected, or does it mean I likely have a defective selector valve.
I inspected the hose I pulled off the input and it was pretty chewed up. But I am not sure if it just had deteriorated or I tore it up trying to get it off. Probably some of both. Ultimately I cut it back about 12 inches and got a hose barb connector and patched a new piece of Barricade in its place. That appears to have stopped the leak for now. But I know the real long term fix is to drop the tanks and replace the fuel hoses from the senders to the valve.
Again my main question is: Is this leaking from the disconnect input normal behavior of the fuel selector valve when one input hose is disconnected, or does it mean I likely have a defective selector valve?
Thank You.
Paul Zerkel
'78 Eleganza II
Salisbury IL (near Springfield)
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