Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: Shiny on June 16, 2018, 12:48:08 PM

Title: Kit Confusion - Which Air Horn Gasket?
Post by: Shiny on June 16, 2018, 12:48:08 PM

69 Buick Carb 29240MD on a 70 Pontiac 350

Kit came with 2 air horn gaskets, looked identical except thickness.

I used the one labeled 2165 which appeared thicker than the 2722.

Why are there 2, what would determine which I should use, did I choose wrong?

Title: Re: Kit Confusion - Which Air Horn Gasket?
Post by: qjetsrule on June 16, 2018, 05:44:18 PM

If both gaskets are exactly the same as the one you took off except for thickness, the thicker one is possibly used to correct for warping of the airhorn. Warping happens when hold down bolts are over tightened and can cause air leakage between the castings. Besides Band-Aid fixes like thicker gaskets it's best to straighten, sand, or flat file flat the airhorn gasket surface. Good luck.

Title: Re: Kit Confusion - Which Air Horn Gasket?
Post by: carmantx on June 16, 2018, 08:34:21 PM

There are several gaskets that look almost the same, but there will be a hole or two in a little different location.

Title: Re: Kit Confusion - Which Air Horn Gasket?
Post by: Shiny on June 16, 2018, 09:22:00 PM

Thanks to both

No difference in holes, so I'm going with qjetsrule

Carb is not warped, but guess I didn't hurt anything

Title: Re: Kit Confusion - Which Air Horn Gasket?
Post by: Cliff Ruggles on June 17, 2018, 03:39:15 AM

For most of those older units we use the 2165 as it seals up better than the thinner one......Cliff