General Category > Quadrajet Carb Talk and Tips

What's the Best Way to Remove Factory Mixture Screw Plugs?

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davis95:
I guess this is one of the downsides to getting a virgin carb. Anyway, what's the best way to get these out without destroying anything? Thanks, Doug.

omaha:
I was thinking about this a while back. I guess the way the GM mechanics did it was to use a hacksaw
and small screwdriver etc. I agree, it looks kinda ugly. I was wondering if you could do something similar as removing the idle tubes in the book. Drill a hole (.100?) and then screw in a drywall screw. Then, using a propane torch, heat up the area real good. Then, carefully pry them out with a set of wire cutters. Not sure of the press fit in the aluminum base plate but i'm sure they are in there pretty good.  I think just drilling them out could possibly work but maybe not due to the possible interference with the idle screw itself. Maybe a combination of drilling and heating and tapping/threading and pulling. Just ideas.
Dont know for sure as I have never seen these plugs actually installed.

Cliff Ruggles:
The caps over the mixture screws on later units are too hard to drill out effectively.  I use an angle grinder, slots both sides, then drive down and out with a sharp punch, takes seconds.....Cliff

Schurkey:
I cut 'em out using a cutting disc in a Dremel.  Carve a 'V" into the aluminum under the plug, break out the aluminum and drive the plug out.  Makes the base plate ugly; but doesn't affect function.

Far as I knew, the actual caps were hardened to PREVENT drilling them.  Haven't seen one in awhile...

schwoch1:

--- Quote from: Schurkey on January 11, 2010, 07:22:43 AM ---I cut 'em out using a cutting disc in a Dremel.  Carve a 'V" into the aluminum under the plug, break out the aluminum and drive the plug out.  Makes the base plate ugly; but doesn't affect function.

Far as I knew, the actual caps were hardened to PREVENT drilling them.  Haven't seen one in awhile...

--- End quote ---

I always used to take the carb off, put a gob of weld on the idle cap and then pull the cap off with a pair of wirecutters. Takes a little effort sometimes, but it looks way cleaner than the hacksaw method, not that anyone ever looked....

Mike

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