95 Explorer. Head bolt thread pitch.

[abrunne]

Hey guys...

I am getting ready to clean up the threads in the block of my 95 explorer to put the heads back on... I guess i have to send a bottoming tap down there.. Can anyone tell me offhand what size tap i need? Thanks..

 

[gmanpaint]

If anyone know it would be Turdle. Might send him a Pm and ask.

 

[abrunne]

Thanks man

 

[gmanpaint]

Thanks man

No prob.

Thank you for thanking me

 

[abrunne]

youre welcome.

 

[BrooklynBay]

Welcome to this forum! I've moved your thread into the stock 95-01 section.

 

[imp]

If you take someone's word for it, and they are wrong, you may wind up running a close-enough tap into your block and ruin the threads.

I like to measure the bolt, over the threads, use a dial caliper or micrometer, figure out the size in mm, if your tool measures in inches. 1 mm = 0.03937 inch. typically, bolts are a few thousandths of an inch under the nominal size, so if you measure, say, 0.314", divide that by 0.03937 to get 7.97mm; the bolt is an 8mm bolt. (your head bolts are bigger than that).

The thread pitch is easy to figger out, too. Use a 6-inch steel scale, hopefully calibrated in mm, check distance from one thread to the next. If in inches, use the 1/32" inch scale, if, for example, it takes 4 increments to span between 2 threads, 1/32 X 4 = 1/8" = 0.125", divide by 0.03937, get 3.1mm, so thread pitch is 3mm. This would be an example of a big, coarse thread bolt pitch. imp

As an aside, the bolt size is proly listed in the Ford Shop Manual........