Leaky Carb

bartmcneill

bartmcneill

Well-known member
My 31 has a Tollitson carb on it but slowly drips. I took it apart and reworked as best I could before installation as it had been rebuilt years ago and never used. Also my indented cowl gas shut off has a slow leak. It seemed to resist removal and I was afraid it might break. Is there a way to stop the Tollitson leak? If I buy a Zenith how can I be sure it wont leak? I had one in another car that leaked. Where is the best place to buy a Zenith? Ebay has them but really high priced. So far Ive had a 30 tudor sedan, a 30 Cabriolet, a 30 Coupe, a 30 pickup, another 30 coupe and now a 31 coupe. Only 2 leaked like this.
 
bartmcneill said:
My 31 has a Tollitson carb on it but slowly drips. I took it apart and reworked as best I could before installation as it had been rebuilt years ago and never used. Also my indented cowl gas shut off has a slow leak. It seemed to resist removal and I was afraid it might break. Is there a way to stop the Tollitson leak? If I buy a Zenith how can I be sure it wont leak? I had one in another car that leaked. Where is the best place to buy a Zenith? Ebay has them but really high priced. So far Ive had a 30 tudor sedan, a 30 Cabriolet, a 30 Coupe, a 30 pickup, another 30 coupe and now a 31 coupe. Only 2 leaked like this.
Click to expand...
Berts in denver may have some good non leaking zeniths!Bert's Model A Center | Call: 303-293-FORD
 

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If you have a crows foot of the proper size an extension to clear the firewall and 18 in breaker bar should work for removing the valve. I’ve used an under sink, plumbing wrench with a cheater bar. That valve is rebuildable ! the taper can be lapped for a leak less valve, before reinstalling clean the trough out in the tank outlet. You maybe can rebuild the valve without removing it.
 
Hello Bart, you must fix the shut off valve on the firewall. The EZ Turn suggestion looks good to me. The shut off valve was installed by Ford to provide a positive shutoff in the event of a leak downstream. I use mine on every shut down especially in public areas. A fellow club member went to the supermarket, had a leak in the parking lot, the police were called, an emergency was declared, the area was closed off and evacuated and the car was towed away and impounded. It was a mess. Not a big deal for a Model A owner but to the public and the police it was a disaster in the making! That valve has to be tight. The valve in the carburetor is prone to leakage because of dirt and rust in the gas tank. Ed
 
I have a huge advantage. I have a Weber downdraft carburetor that requires a fuel pump. The fuel pump will not pass any gasoline when off. It like having an automatic shut off valve. To keep the gasoline from forming a sludge in my carburetor, I still have to turn off the fuel valve under the tank and run the carburetor dry when I am going to be away for a month or more.
 
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