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Author Topic: APT Adjust  (Read 2360 times)

Offline Paul

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APT Adjust
« on: March 17, 2011, 03:20:50 PM »
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?
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Offline Cliff Ruggles

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Re: APT Adjust
« Reply #1 on: March 18, 2011, 05:50:12 AM »
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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