The Ford Barn

EZLIFE · 02-06-2023, 01:25 PM

I need to buy and run a tap into a corroded casting where the GAV nut screws in. In measures really close to 7/16 x 20 tpi or 11mm x 1.25. Anyone know if it is metric or english?

Y-Blockhead · 02-06-2023, 01:31 PM

Marvels were made in USA. Here is info from Renner's Corner.

ModelA29 · 02-06-2023, 05:28 PM

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Use a bottom tap or take an old nut and file (or dremel) 3-4 slots in the threads (so it looks like a tap) then use some WD40 and clean them out. You don't really need a hardened tap since you are just cleaning the crud out of the existing threads and not cutting new ones.

02-06-2023, 01:25 PM	#1
EZLIFE Member Join Date: Dec 2021 Posts: 33	Marvel carburetor GAV threads in casting? I need to buy and run a tap into a corroded casting where the GAV nut screws in. In measures really close to 7/16 x 20 tpi or 11mm x 1.25. Anyone know if it is metric or english?

02-06-2023, 05:28 PM	#3
ModelA29 Senior Member Join Date: Sep 2022 Location: SoCal Posts: 638	Re: Marvel carburetor GAV threads in casting? Sponsored Links (Register now to hide all advertisements) Use a bottom tap or take an old nut and file (or dremel) 3-4 slots in the threads (so it looks like a tap) then use some WD40 and clean them out. You don't really need a hardened tap since you are just cleaning the crud out of the existing threads and not cutting new ones.