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Fuel vacuum pump priming?

 

(@todd-hendrickson)
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Joined: 8 years ago
Posts: 3
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Getting close to starting my ‘28 after complete restoration…how do I prime the fuel pump?


   
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Chip
 Chip
(@chip)
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Joined: 55 years ago
Posts: 150
 

You can take off the top and pour in up to a quart of gasoline put the top on and go. Or since I don't want to have to make a new gasket I have a small piece of tubing with a 90 deg. bend that has fitting on one end and small funnel on the other. Pour in the gas, reinstall the line from the gas tank and go.

How sweet the roar of a Chevy four
Participant on Chatter since 11/22/2001
19758 posts on the former Chatter site


   
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(@todd-hendrickson)
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Thanks Chip


   
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(@mitchell-grexa)
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Joined: 3 years ago
Posts: 2
 

I usually prime the pump just as chip stated. The repair manual states to turn the motor over until the vacuum pulls the fuel from the tank. I tried this method but it takes forever. Direct pour in the canister is much faster. If you do not want to take anything apart, you can always spray starter fluid in the air cleaner. So long as the engine starts the fuel pull will occur.


   
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Rustoholic
(@rustoholic)
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Joined: 33 years ago
Posts: 94
 

To avoid having to take the top of the tank off to prime it, I added a 1/8" NPT tee into the inlet line with a plug that I can easily take out in order to squirt some gas in there. See the photo with the red circle.

To facilitate squirting the gas, I have an empty Coke bottle with a tube attached to the cap.

To fill the bottle with gas, I added a gas valve inline under the gas tank so I can fill the bottle directly from the tank, thus eliminating the need for a portable gas can. See the other two photos.

I keep the gas squirt bottle with the truck in the toolbox that I keep in the truck's bed.

Cheers, Dean

vacuum tank circled
VacTankPrimingBottle
GasValveUnderTank

 

Dean "Rustoholic" Meltz
San Leandro, CA
3511 posts on vccachat.org
1927 LM one ton truck - tinyurl.com/Lurch-VCCACHAT-Gallery
1928 AB Canopy Express (1/2 ton truck) - tinyurl.com/Justin-Stovebolt-Gallery


   
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(@ronald-s-beam)
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Joined: 27 years ago
Posts: 2
 

I've been known to remove the gas cap and blow hard into the tank, but I wouldn't recommend it. 😜 


   
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(@todd-hendrickson)
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Joined: 8 years ago
Posts: 3
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Thanks gentlemen. Great info!


   
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(@neil-fullwood)
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Joined: 8 years ago
Posts: 4
 

I fitted an outboard engine inline fuel primer ( squeeze bulb ) into the fuel line where the body and chassis meet. A few pumps and there's enough fuel to start the car. Especially after car has sat for a while.


   
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(@anthony-williamson)
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Joined: 19 years ago
Posts: 170
 

The problem with those primers is they are made of rubber and as such have a limited life span but is certainly a good idea.

Tony


   
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Stephen S Gow
(@stephen-s-gow)
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Joined: 21 years ago
Posts: 15
 

Remove the fitting at the bottom of the vacuum tank and fill the line with gas. Reinstall the line to the vacuum tank. Start your engine. The vacuum tank will fill before you run out of the gas you primed the line with. It's a one-time event so no need to make any elaborate set ups.  Once the Tank is full it will stay full unless you have a leak problem in the system.

 


   
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