Author	[Modern View]
mole 10-12-2010 14:26:27 64.184.6.242 Report to Moderator	First of all, if you have never used one before, as you already figured out a head bolt hole in an engine block is not the place to learn how to do it. There is a special tool to screw the insert in with, did you use it? They screw them in from the bottom instead of the top and they go in a lot easier. I would never use a heli-coil on a head bolt. There are thread inserts that are much heavier and better suited for that application. Only problem with them is they are thicker and sometimes there is not enough clearance for them. If you screwed up the new threads enough that another heli-coil won"t go in then you are limited to three options. Go with the next bigger bolt or use a thread insert that is for the bolt you have. The last resort is have the hole welded and redrilled. The thread inserts also have their own special installation tools you would need to buy if you go that route. [Reply]   [No Email]
bob 7337 10-12-2010 16:51:51 64.12.116.199 Report to Moderator	Re: Help helicoil not working in reply to mole, 10-12-2010 14:26:27   I don't know how deep the hole is but if it is deep enough you can put one in and screw annother one on top of it to get more threads to pull on! [Reply]  [No Email]
Won't Work 10-14-2010 23:02:24 208.53.211.186 Report to Moderator	Re: Help helicoil not working in reply to bob 7337, 10-12-2010 16:51:51   No you can't. The external threads on a HeliCoil are not a standard thread. You can not stack them. [Reply]  [No Email]