Hmmm. I bought a bottoming tap on the advice of Frank R. I'm not sure what the difference would be between this and a thread-cleaning tap?

From what I can see the thread pitch is the same as the head bolt threads. I will check it again this evening. Maybe the issue is the M10 vs. M12? Anyone know definitively what the correct one is?

Yes, I have all new bolts and washers for installation.

Eric W.

Last edited by 89IsMine; 09/20/11 04:53 PM.
'89 Dodge Raider -- 3.0L V6, MT, SWB