GAV thread sealant

[Cool Hand Lurker]

As Mitch indicated you could still have a crack... I might suggest bench testing the carb as well for leaks. It's important to get the same "level" as it would be on the car... but you can lightly mount it in the bench vise, use a shortened fuel line going upward with a small funnel, and fill the bowl with fuel... as it would on the car the bowl will fill, float valve close and hopefully sealing well, and the carb should be dry. You can let it sit for some time and even overnight. If it is dry you should be good, if not then you have to determine where the leakage is. If it's coming out of the throat then the cab or main jet not tight in the seat or you more likely have either an incorrectly set float or needle and seat leaking, which is causing it to top over the jets.

If it's leaking externally at the gav area look at the plugged area at the bottom of the GAV, maybe it's weaping or you have a crack. I've had a carb or two have some issues in this area.

Good luck... confident you will find it!
Larry

EXCELLENT idea, Larry! I will be using your method this afternoon.
Thank you!

 

[stouchton]

Missed Druyea Days, but went to a local show - all is well. Been out a couple times and no leaks at all. Permatex 80019 is holding up to the ethanol blend.

Larry did have a good idea, and I did something similar. I simply had the bottom of the carb on my bench, and filled the bowl till it was 5/8" full of gas. I could then watch where the fuel weeped out of the gav fitting - which was at the top around the threads. Didn't start leaking till the fuel level in the second well was that high.

I'll post back if the 80019 fails....