Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Help with broken throttle plate screws?

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bobsessed:
Taking my carb apart to rebuild with Cliff's kit, I broke 2 of the throttle plate screws. I managed to "ease-out" one of them, the the screw extractor actually broke off in the other. Now, of course, the tiny drill won't cut the piece of metal stuck in the screw. My question is, if I can't get that screw out, will it be OK to drill it larger and put in 1 new screw?......OR....., what would you do?

Shark Racer:
Yes, it's OK. You can drill out and tap to #4 or #6 screws.

Cliff Ruggles:
Drill as close on center as you can with .104-.106" drill bit, tap for 6-32, no worries.  We see this ALL the time here.  I have #6-32 screws with pan heads on them, and they don't take up any more area than the factory 3-48's with Fillister heads.....Cliff

Ethan1:
 Yeah, Cliff took the broken screws in my carb. Did an awesome job.

bobsessed:
Excellent....I got it out, now to tap and get new screws. Should I tap all four, or just the damaged one?

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