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Question about Carb repair.
Posted by: Murphy ()
Date: June 19, 2022 07:21AM

Checking adjustments on Carb last night I found the fast idle cam screw is stripped. Is there a time cert or helicoil small enough to do this?
Correct me if I'm wrong, but i have 7/32 x 28 tpi. for screw size.

OR....another idea beside changing out the carb body?

Happy Dads day to the Dads.

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Re: Question about Carb repair.
Posted by: Wagon Master ()
Date: June 19, 2022 07:46AM

According to my screw chart if it is indeed 7/32" in diameter that would be a #12 machine screw.

Re: Question about Carb repair.
Posted by: Murphy ()
Date: June 19, 2022 08:09AM

Wagon, I see what you are saying.

Is this how I shoulsd search- (#12 x 28) tpi?

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Re: Question about Carb repair.
Posted by: Wagon Master ()
Date: June 19, 2022 04:26PM

Yup.

Been aircooled since 1973
Northwest Ohio 45840

Re: Question about Carb repair.
Posted by: Murphy ()
Date: June 19, 2022 05:45PM

Going to try a tap tool first. Not sure if there is enough material to repair the threads that way.

If that doesn't work, I have another carb bottom.

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Re: Question about Carb repair.
Posted by: ROD ()
Date: June 19, 2022 09:21PM

if it was 7/32 stripped maybe tap for 8/32 or drill and tap for 10/32 and keep the otherwise good working matching carb bottom. new spring and screw should be available at most hardware stores.
our tap chart here on the wall doesn't show 7/32 sorry

Rod Tetrault
El Cajon , CA
65 Corsa Yenko Clone / 65 Corsa EO Creampuff Vert
66 Corsa "JIMISH" Mid engine Turbo LS1 currently 2nd fastest Corvair in the USA
Corvair powered Buggy x 3
Enough hidden parts to build a space ship


Re: Question about Carb repair.
Posted by: Wagon Master ()
Date: June 20, 2022 07:42AM

???
#12-24 machine screw takes a #16 drill bit which is .1770.
Murphy is measuring the outside dia. of the fastener at 7/32" or .2188
Both 8-32 and 10-32 are a smaller size fastener.
As the first number goes up, so does the screw diameter. Unlike sheet metal and wire gauge.

Re: Question about Carb repair.
Posted by: wittsend ()
Date: June 20, 2022 10:09AM

I have soldered on the appropriate sized nut when something like (steel) throttle linkage gets striped out. Unfortunately sometimes the threaded portion is in the non-ferrous carb body that obviously can't be soldered to.

It would be a pain to adjust but if one lacked solder skills they could used a nut on either side to lock the screw once set.

------------------------------------------------------------------------------

***'61 Lakewood, a "Freebie" in hibernation for 27 years - In the process of applying CPR.***

Re: Question about Carb repair.
Posted by: ROD ()
Date: June 20, 2022 01:45PM

Wagon Master Wrote:
-------------------------------------------------------
> ???
> #12-24 machine screw takes a #16 drill bit which is .1770.
> Murphy is measuring the outside dia. of the fastener at 7/32" or .2188
> Both 8-32 and 10-32 are a smaller size fastener.
> As the first number goes up, so does the screw diameter. Unlike sheet metal and wire gauge.



oops , no wonder 7/32 screws weren't on my tap chart ! I missed the x28tpi
6/32
8/32
10/32

He might get lucky with an M5 screw

Rod Tetrault
El Cajon , CA
65 Corsa Yenko Clone / 65 Corsa EO Creampuff Vert
66 Corsa "JIMISH" Mid engine Turbo LS1 currently 2nd fastest Corvair in the USA
Corvair powered Buggy x 3
Enough hidden parts to build a space ship


Re: Question about Carb repair.
Posted by: Murphy ()
Date: June 20, 2022 04:59PM

I had to order a tap tool for this. Be here in a day or so. I'll try to repair the threads first.

Murphy

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Re: Question about Carb repair.
Posted by: Frank DuVal ()
Date: June 20, 2022 06:06PM

Metal type epoxy. J B Weld, Plastic Steel, the stuff you cut and mash together out of a cigar type tube. Fill hole, grease that bolt and screw in gently. Let dry. When cured, remove screw and install again with the fast idle cam.

Frank DuVal

Fredericksburg, VA



Edited 1 time(s). Last edit at 06/20/2022 06:07PM by Frank DuVal.

Re: Question about Carb repair.
Posted by: Murphy ()
Date: June 21, 2022 03:25AM

Frank,

Thanks, Thats a great trick. Thanks.
Murphy

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

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