Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: Silver 7T8 on February 07, 2016, 03:58:21 PM

Title: Preferred thread size & type APT Access Plug?
Post by: Silver 7T8 on February 07, 2016, 03:58:21 PM

What is the best choice when replacing the APT press-in plug -
1/8" counter sunk PIPE Thread Plug ?
3/8" X 16 (course) Socket Head Screw ?
3/8" X 24 (fine)      Socket Head Screw ?

What is the size of the APT screw on the Edelbrock carb.
shown on page 119 upper right photo Cliff's Book ?

Thank You To All Who Offer Assistance on this Great Sight!(http://)

Title: Re: Preferred thread size & type APT Access Plug?
Post by: Ethan1 on February 07, 2016, 04:39:12 PM

Quote from: Silver 7T8 on February 07, 2016, 03:58:21 PM

What is the best choice when replacing the APT press-in plug -
1/8" counter sunk PIPE Thread Plug ?
3/8" X 16 (course) Socket Head Screw ?
3/8" X 24 (fine)      Socket Head Screw ?

What is the size of the APT screw on the Edelbrock carb.
shown on page 119 upper right photo Cliff's Book ?

Thank You To All Who Offer Assistance on this Great Sight!(http://)

 I would go with the 3/8"-24 allen head screw. At least that is what I have used. :)

 Not sure on the Edelbrock APT in Cliff's book. Cliff would be best to answer.

 Glad to have you on this site as well. 8)

Title: Re: Preferred thread size & type APT Access Plug?
Post by: 77cruiser on February 07, 2016, 06:17:15 PM

I've always used the 1/8 pipe plug, saw where Cliff mentioned 3/8 set screw.

Title: Re: Preferred thread size & type APT Access Plug?
Post by: carmantx on February 07, 2016, 07:43:32 PM

I use the 3/8 x 16

Title: Re: Preferred thread size & type APT Access Plug?
Post by: Silver 7T8 on February 08, 2016, 11:03:55 AM

Looks like I received a "Vote-for-each-Choice"?
I guess any of the THREE will work as a screw-in APT Plug.

Again, THANKS to ALL

Title: Re: Preferred thread size & type APT Access Plug?
Post by: Cliff Ruggles on February 09, 2016, 02:56:20 AM

3/8"-16 works fine, that's what we put in our fastener kits for the later APT models.

Edelbrock used fine 3/8" fine threads.....Cliff

Title: Re: Preferred thread size & type APT Access Plug?
Post by: AnotherMOPAR on February 26, 2016, 10:11:09 PM

I used 3/8s 16 Allen as well on all the ones I've replaced. Anything alse and you gotta fiddle with the gasket/airhorn surface too much. IMO