| [GMCnet] My 1976 Palm Beach Project [message #320317] |
Wed, 12 July 2017 09:51  |
glwgmc
Messages: 1014
Registered: June 2004
Karma:
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Senior Member |
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Hi Justin,
Congrats on your marriage!
Glad you ditched the mechanical pump and engine compartment fuel lines. Watch out for the fuel selector valve as it is another known failure point. Better in my mind to draw directly from one of the tanks (I like the rear/main) with the electric pump to push fuel to the Fuel Command Center. That will provide access to around 42 gallons, way more driving than I ever do in one stretch. My process is to fill the tanks, drive for 200-250 miles and stop to refill and walk around a bit. No matter how much steady up hill driving you do there still will be adequate fuel from one tank to do 250 to 300 miles. Steady down hill driving will take care of itself. If you really want access to all 50 gallons and/or reduncancy, put on two electric fuel pumps with check valves and merge the lines forward of the pumps. Use the tank selector switch to power a normally on relay with the normally on line going to the pump on the rear/main tank and the normally off line going to the pump on the forward/reserve tank. Mount both pumps and the relay outside the frame rails where it is cooler and easy to access.
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: 12
Date: Tue, 11 Jul 2017 19:36:15 -0600
From: Justin Brady
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] My 1976 Palm Beach Project
Message-ID:
Content-Type: text/plain; charset="utf-8"
Quick update.
Were 95% finished and driving it to Wyoming to get married.
The first day was awful, mostly due to vapor lock (that my previous fix only helped postpone didn't fix) after a lot of head scratching and cursing I
finally said screw it and ran new fuel line from the selector switch to an electric fuel pump and then straight to the command center. Never goes into
the engine compartment and never goes through the mechanical pump.
This 100% solved the problem.
So the problem all along was the fuel line running in the engine compartment and through the mechanical pump. It's just too damn hot in there for fuel
to sit in a hose for very long.
Fuel was boiling between the mechanical pump and the command center.
Once that was fixed we were rolling.
Now I've got an oil leak somewhere. Looks like the mechanical pump gasket from what I can tell. (mechanical pumps are the devil in my eyes now).
Otherwise she's running great and were in Nebraska somewhere enjoying it.
--
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
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Jerry & Sharon Work
78 Royale
Kerby, OR
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