View Single Post
Old 03-28-2015, 01:02 PM   #16
69m22zl1
Registered User
 
Join Date: Dec 2014
Location: Sacramento
Posts: 4
Re: air injection manifold plugs

Quote:
Originally Posted by Titomars View Post
Most GM AIR injection tubes are fitted to the manifolds with flare nuts which are straight threads not NPT. I always use Allen head set screws. The size I have used is 1/2 X 20 the taper of the set screw tip is close enough to the 45deg flare which lets the set screw seal at the flare not the threads. I also use anti-seize on the threads for removal at a later time.
I cut the air injection tubes and used a 22 mm to remove the them.
It looks like fine thread . An earlier post, Someone posted they used 19mm oil drain plug from Cummins diesel . Does anyone know year make model plug is from? Or if any of you can point out the plug I need would be very helpful . Thank you!
Attached Images
  
69m22zl1 is offline   Reply With Quote