Stripped head bolt hole

A while back I stripped out a head bolt hole on my 460. Havent fixed it yet. Just thinking about running a tap in the hole to clean the threads and call it done.

What do you think?

When you say stripped do you mean you overtorqued it and it started to pull all of the threads out of the block???

From the pics it looks like maybe just the top couple threads are missing...

If just the top couple are damaged and it feels solid when you torque it then it should be ok.

If all of them were comprimised by overtorquing then I would be thinking about a heli coil or a new block...

dkp

I had one stripped one in one of my D1 blocks. I bought a tap set. I think they are 9/16.It was about $100 for the Tap,drill bit and the Heli coil. I will send the kit to you if you promise I get it back.

Do NOT Helicoil it use a Keensert it is much better deal it is steel threaded not just a coil in it, I have seen the Heli coils pull and come out regularly.... from the pic's I would run a tap down it and see if it cleans it up first.


Randy

Its only that hole and I did it by putting a short head bolt in where a long bolt should have gone.

Try a tap first. If it's pulled enough to need fixing, use a Keensert or a Timesert. I've used these on the wet head bolts in the late model smallblocks to make them dry holes

What could that tan stuff in the water jacket be?

does anyone have a pic of a keensert never heard of one sound like it better

www.fulltorque.com

the Coug wrote:Do NOT Helicoil it use a Keensert it is much better deal it is steel threaded not just a coil in it, I have seen the Heli coils pull and come out regularly.... from the pic's I would run a tap down it and see if it cleans it up first.


Randy

x2 that is what we use in the aerospace for planes and so on.

bigjohn2007 wrote:does anyone have a pic of a keensert never heard of one sound like it better

Here is a keensert, once it is in, you drive the 4 stakes down and it locks it in place so it would back out when you unscrew the bolt, as Randy had mentioned.

http://www.ondrives.com/fasteners-inserts-m4-m12-thread.html