Helicoil for fuel inlet

[JaberJaw]

So glad I found this group and Thank You for letting me join. I just noticed that the 7/16 fuel inlet on my Carter BB carburetor was slowly leaking. I removed the fuel line so I could get at the Brass Fitting and when I pulled it out I noticed a thread of white metal from the Carb came out with it and they had put white Teflon Tape on to seal it before I purchased it. I was able to remove two strings of Teflon and slowly screwed in this time with some aviation form a gasket number 3 with no luck so when I removed it again another thread from the carburetor came with it but now I know it's time for a rebuild and the kit is coming but my question is. Has anybody or could I insert a 7/16 helicoil on the fuel inlet that has the jet right where it meets the Float? There are still four or five good threads left.

A refurbished carb is on its way but I would like to rebuild this one on the bench with the kit and hopefully I can restore the threads with that Helicoil. What you see in the picture is the remainder of the aviation #3 that I have to clean out. Any information would be extremely helpful

[JaberJaw]

It's for a 1939 Plymouth p8 four-door sedan. Carter BB single tube downdraft carburetor

[Sniper]

That is a common issue on Q-jets and helicoiling is the fix.

 

Now I don't know if that will apply to your BB carb, 

[Bryan G]

I can tell you that I messed up the threads on mine, and wondered along the same lines. I decided to try something that isn't supposed to really work: JB Weld. That was a year ago and...still no leak. 

[nonstop]

I did a Heli-Coil in the inlet of a B&B.  It held great and no leaks!

[vintage6t]

8 hours ago, Bryan G said:

I can tell you that I messed up the threads on mine, and wondered along the same lines. I decided to try something that isn't supposed to really work: JB Weld. That was a year ago and...still no leak. 

 

I've also used JB Weld to fix threaded holes. Including tappered pipe threads in an aluminum intake for a temp sensor with no resulting leaks. Fill or just fill around the circumference of the hole, drill and tap.

 

I find the quick setting product easiest to work with for this type of application. You have to be a bit careful when tightening the fastener, but it does work very well for what it is.

[Sam Buchanan]

My recall is a bit fuzzy on this but I think it is necessary to remove the brass fitting in order to access the needle valve on the B&B carb. While JB Weld is wonderful stuff and can permanently fix the threads removing the needle valve may no longer be possible.

[Jerry Roberts]

6 hours ago, Sam Buchanan said:

My recall is a bit fuzzy on this but I think it is necessary to remove the brass fitting in order to access the needle valve on the B&B carb. While JB Weld is wonderful stuff and can permanently fix the threads removing the needle valve may no longer be possible.

Sam ,  I have a fuzzy memory too , but I think that the fitting is threaded both on the outside and also on the inside . 

[Sam Buchanan]

1 hour ago, Jerry Roberts said:

Sam ,  I have a fuzzy memory too , but I think that the fitting is threaded both on the outside and also on the inside . 

You're probably correct, been awhile since I've had mine apart. 

[Sniper]

8 hours ago, Sam Buchanan said:

My recall is a bit fuzzy on this but I think it is necessary to remove the brass fitting in order to access the needle valve on the B&B carb. While JB Weld is wonderful stuff and can permanently fix the threads removing the needle valve may no longer be possible.

The inlet fitting is where the needle seats, but You can remove the needle from inside the bowl if you take the top off and remove the float.

 

[Sam Buchanan]

OK, so the seat is part of the fitting. Guess that's what I was thinking about when wondering if permanently attaching the fitting was a good option. 

[vintage6t]

9 hours ago, Sam Buchanan said:

My recall is a bit fuzzy on this but I think it is necessary to remove the brass fitting in order to access the needle valve on the B&B carb. While JB Weld is wonderful stuff and can permanently fix the threads removing the needle valve may no longer be possible.

 

The idea is to fill the whole as much needed with JB, drill and re-tap. Not so much to permanently attach the fitting with JB.

[Sam Buchanan]

1 hour ago, vintage6t said:

 

The idea is to fill the whole as much needed with JB, drill and re-tap. Not so much to permanently attach the fitting with JB.

 

?

Edited June 9, 2023 by Sam Buchanan

[53windsor]