Prev Previous Post   Next Post Next
Old 03-09-2024, 07:06 PM
Burbach 174 Burbach 174 is offline
Junior Member
Join Date: Aug 2021
Location: Sioux Falls
Posts: 22
Default 60 389 Exhaust Bolt size mystery

I'm getting ready to remove the exhaust manifolds so I can get to the freeze plugs more easily but assuming I'll want to replace the manifold bolts, I'm not finding any information about them. All the vendors list 64 and up!
So dopes anyone know what the difference is and perhaps the diameter is different than later 389 blocks?
I did confirm going BACK TO 55 they should be the same but still can't find the bolt information w/o a parts book... Thank you!


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 10:00 AM.


About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.


Copyright © 2017