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08-19-2020, 02:09 PM | #1 |
Senior Member
Join Date: Jun 2017
Location: Southport CT
Posts: 318
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GAV leaking
With the air filter removed, and the car not running, the throat of the carb intake is pooling with fuel. I believe my GAV is fully closed so I assume the needle isn't seating fully.
Thoughts/advice? Thank you, Carl |
08-19-2020, 02:21 PM | #2 |
Senior Member
Join Date: May 2016
Location: Scottsdale, Arizona
Posts: 612
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Re: GAV leaking
Good afternoon...You might with to check your float level...Ernie in Arizona
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08-19-2020, 02:24 PM | #3 |
Senior Member
Join Date: Jun 2017
Location: Southport CT
Posts: 318
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Re: GAV leaking
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08-19-2020, 03:00 PM | #4 |
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Join Date: Apr 2013
Location: Northwest CT
Posts: 1,092
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Re: GAV leaking
You want the gas level ~5/8" below the gasket, some like 15/16". A good rule of thumb is to have the seam of the float at an even 1" from the casting with the upper half flipped upside down. This info is all for the Zenith. You also want the cap jet to have a depth of 7/16" from the machined surface of the lower half and the main jet to have a depth of 3/8".
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08-19-2020, 03:08 PM | #5 | |
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Join Date: Jun 2017
Location: Southport CT
Posts: 318
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Re: GAV leaking
Awesome, thank you.
Quote:
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08-20-2020, 05:48 AM | #6 |
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Join Date: May 2010
Location: Washington Cty., ME or Flagler Cty., FL
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Re: GAV leaking
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08-20-2020, 08:20 AM | #7 |
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Join Date: Jul 2010
Location: United Kingdom
Posts: 1,444
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Re: GAV leaking
"With the air filter removed, and the car not running, the throat of the carb intake is pooling with fuel. I believe my GAV is fully closed so I assume the needle isn't seating fully."
The GAV needle won't cause fuel to leak out of the carb, a non sealing GAV needle will cause rich running but will not cause fuel to pool in the throat of the carb. Your problem is number 1,2,3,4,5,6,7,8,9,10 on the list below you'll probably find it's 1 or 2 if it's been OK up til now Problem: Remedy 1 Leaking/loose float valve gasket: Tighten/reseal/replace 2 Leaking float valve: (or crud stopping it sealing)Replace ( or clean up if possible ) 3 Friction on float hinge: Loosen 4 Incorrectly set fuel level: Re-set 5 Hole in float: Repair or replace 6 Too many gaskets on main jet Check 7 Cap jet or main jet too short: Replace 8 Leaking/loose gasket at main jet: Tighten/reseal/ replace 9 Leaking /loose gasket at cap jet: Tighten/replace 10 Leaking or loose GAV housing threads: Tighten/ reseal/ replace 11 Leak at fuel inlet union: Tighten/reseal/replace 12 Loose/leaking gasket at strainer: Tighten/reseal/replace 13 Loose/leaking gasket at drain plug: Tighten/reseal/replace 14 Cracked housing/leaking passage plugs: Repair or replace |
08-20-2020, 09:53 AM | #8 |
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Join Date: May 2010
Location: Portland OR
Posts: 6,342
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Re: GAV leaking
The GAV is not a shut off. If you try and use it as such you can/will score the tip when trying to close too tight. The GAV does not need to be shut down every time the car is stopped. Once you find it's best position, leave it and only open enough to start the car then return it to the best run position.
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08-20-2020, 02:13 PM | #9 |
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Join Date: Jun 2017
Location: Southport CT
Posts: 318
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Re: GAV leaking
Fantastic info all - I will follow your instructions.
Thanks, Carl |
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