General Category > Quadrajet Carb Talk and Tips

APT Adjust

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Paul:
I would like to thread and install a plug into the air horn for the APT on my 17057266 pontiac quadrajet What would be the best way to do this so the APT can be accessed?

Cliff Ruggles:
Our HP rebuild kits come with a plug for the APT hole in the airhorn.  It must be tapped about 3-4 turns deep with a 3/8-16 tapered tap, so the plug sits flush with the top of the casting.....Cliff

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