Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Diagnose a Quadrajet carburetor problem => Topic started by: bobsessed on May 01, 2013, 07:48:38 AM

Title: Help with broken throttle plate screws?
Post by: bobsessed on May 01, 2013, 07:48:38 AM

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?

Title: Re: Help with broken throttle plate screws?
Post by: Shark Racer on May 01, 2013, 08:23:19 AM

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

Title: Re: Help with broken throttle plate screws?
Post by: Cliff Ruggles on May 04, 2013, 03:15:24 AM

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

Title: Re: Help with broken throttle plate screws?
Post by: Ethan1 on May 04, 2013, 04:23:58 PM

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

Title: Re: Help with broken throttle plate screws?
Post by: bobsessed on May 06, 2013, 06:20:22 PM

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

Title: Re: Help with broken throttle plate screws?
Post by: Cliff Ruggles on May 08, 2013, 04:00:53 AM

I usually do all of them, as the 6-32's are a better deal all the way around anyhow.....Cliff

Title: Re: Help with broken throttle plate screws?
Post by: bobsessed on May 08, 2013, 04:39:49 PM

OK good.....should I put threadlocker on the screws? Blue or red?

Title: Re: Help with broken throttle plate screws?
Post by: bobsessed on May 09, 2013, 04:36:48 PM

Bump?

Title: Re: Help with broken throttle plate screws?
Post by: Cliff Ruggles on May 14, 2013, 04:08:32 AM

Use loctite (red) or stake them, no need to do both....Cliff