Helicoil questions...

[The Trooper]

Hi guys!


What is the smallest depth of hole that you can install a Helicoil into? As i have a Soul Destroyer, basically a DS billet engine with MMR porting and the threads in the top of the cylinder keep stripping as as i'm sure you know the metal the heads are made out of it rather soft and easy to pull the threads out of. I'm hoping to have Rob @ IRC install a helicoil (of course if he doesn't mind into each of the small M4 holes that hold the heat sink to the cylinder. Would this be possible, bearing in mind the holes are only around half a centimeter deep.

Cheers lads and lasses!

Will

[tectic]

All the info you need is right here
http://www.helicoil.in/pdf/HeliCoil%20Catalogue.pdf

[Sonic@OBR-UK]

certainly seems like a soul destroyer ...i would say will work but dont knw how long would last due to the shallow depth maybe try going easy when putting them in

[Craig-robbo]

I found JB weld to work on rethreadding.

Put a little oil on the screw and pack the hole with JB sink the screw in and let it set, once its set unscrew sand and finish the top.

Always worked for me.

Craig

[Echlin W]

Bollox to that.

[hazy2010]

hi mate the smaller sizes are usually about 5mm to 8mm long so you should be able to fit them if you havent got a tool to fit them take an old screwdriver cut the tip off and cut a slot in the end you will need this to fit them..all the best steve..

[hazy2010]

or why not just tap out to m5 ..

[innovative-rc]

1xD is smallest helicoil for any size of thread

so, M3 would be 3mm long, 1xdiamiter of thread
M8 would be 8mm

you might get spshials but it would not be a standard, we used to buy thousands of the things every month at one point

[Spriggan]

The prob you may have is taping out a clean thread for the coil to go in, if you have a restricted depth in a blind hole, as there is a slight lead in on even the 2nd stage tap.
I have cut a tap off in the past to get a square end, even then you still need a bit of depth to play with.

Good luck.

Keith.