Engine/Transmission (1994 - 1998) source for bottoming tap

[BLeinart]

I'm looking for a good bottoming tap for my block before I put my studs in. I'm pulling the head, so that won't be an issue.

 

[Woodenhead]

Here's some reading for you.



https://www.turbodieselregister.com/forums/12-valve-engine-transmission-1994-1998/192734-installing-arp-head-studs.html

 

[SRath]

You can make your own bottoming tap out of a regular tap by cutting/grinding and squaring off the tip.

 

[JDKammin]

I had to clean out head bolt holes in an 855 Cummins that I overhauled a few years back. It was an uncommon metric bolt and pitch. I took the longest head bolt on the engine and took a cutoff wheel on die grinder. I cut into the threads at an angle across the threads in two places. Then, use some penetrating oil and ran the bolt down to the bottom of the threads and blow out with carb or brake cleaner. I have some head studs I am going to install on my 5. 9 and will do the same thing, since the bolts will be replaced with the studs.

 

[Gary - K7GLD]

You can make your own bottoming tap out of a regular tap by cutting/grinding and squaring off the tip.

YUP - did that when installing head studs on small block Chevies in past years...

 

[FordCummins]

MSC and Grainger both have the tap you need, and will ship overnight with no problem.

 

[12Vmudder]

I bought mine from Fastenal... I'd have to dig it out to tell you what pitch the threads are... I think it was about $15 or $20.