Alright then!!!! The tap I was told to buy and did is a 12mm 1.75. I only did one tap and maybe I tried to tap too deep??

 

Check the tap against the threads on the stud. If they match up, its good. If they don't, then you have the wrong tap. I thought it was a M12x1.5 thread?

 

ya me and tate have the sme tap

 

... OUCH!

 

yup its M12x1.5 I did my ARPs just not too long ago........

 

Sucks to be you!

Look on the bright side, though - at least you only tapped one hole the next size up (darn furrin' Metric crap! )

Let me know if you need help finding a metric heli-coil insert...

 

It's not that sloppy! It's just not as tight as the other ones. I did a search on here and multiple people said to use that one. I'll be fine and glad I only did one.

 

One last time, it's a 12mmx1.5???

 

Take a stud and put the tap to the threads that go in the block. If they are the same, they will match up. If its not the same, they won't. Easiest way to tell.

 

The 12mm 1.75 tap I have lays 100% perfect in the threads of the 12mm ARP head stud, now I'm stumped????

 

Are the top and the bottom same pitch? Some will have a different pitch so it can only go in one way.

 

Yup. I'll grab a 12mm 1.5 tomorrow and compare before going any further. Thanks Tate and I'll let you know tomorrow..

 

i know this will ruffel a lot of feathers. and i dont want to offend anyone. that said why not just screw then in and be done. even if you are using fire rings i doubt it will matter. i know a lot of people say you have to do this and go through that torque then loosen and torque then loosen bit. but ive put heads on 4 trucks 2 with studs 1 with new bolts,all fire ringed none of them were tapped none ever retorqued one of them even reused the old bolts. all of them were torqued to 140lbs. not a one has leaked yet. when my gasket finaly dies all ill do is stud it,torque it and forget it.


hope i dident tick anyone off just sharing what i know works...

 

Oh Keerap.......stop the presses. I did a little more searching and it looks like it is supposed to be 1.75.......apparently my memory is garbage.

 

Its M12X1.75mm