How to install a Heli-Coil
 

How to install a Heli-Coil

The subject is a Toyota 2ZZ engine block
The bolt holes were cracked and then were welded making the holes out of line. The heil-coil will make this a simple fix.

The tools needed will be a Drill motor, the proper sized drill bit for the heli-coil kit, the heli-coil tap, install tool, and the heli-coil insert.
https://www.miataturbo.net/attachmen...ine=1357315301

The Heli-coil kit being used is a 8 x1.25mm
The drill bit needed is 21/64

https://www.miataturbo.net/attachmen...ine=1357315301

Install the drill bit into the drill motor, and drill the hole out.
https://www.miataturbo.net/attachmen...ine=1357315301
Blow out the hole with compressed air
https://www.miataturbo.net/attachmen...ine=1357315301
Next take the heil-coil tap
https://www.miataturbo.net/attachmen...ine=1357315301

Tap the hole to its oversize.
*NOTE* Heli-Coil taps are an odd size.

On aluminum use a cutting fluid.
https://www.miataturbo.net/attachmen...ine=1357315301
Keep the tap straight and square to the work piece.
Blow the hole out again
Now put the insert on the install tool
https://www.miataturbo.net/attachmen...ine=1357315301
Now carefully screw the insert into the threads that were just cut, being careful not to apply too much force and skip a thread.

https://www.miataturbo.net/attachmen...ine=1357315301

Make sure to counter sink the top of the heil coil by a thread or two

https://www.miataturbo.net/attachmen...ine=1357315301

Once the insert is in properly, snap the bottom tab off and blow it out of the hole.
https://www.miataturbo.net/attachmen...ine=1357315301

All done and ready to have the part bolted back!

Somebody buy this man a camera and teach him how to use it

I have a diffrent camera now, this is an older write up I have just posted.

Seriously, if you haven't read through all of his informational posts and don't known about the camera situation, shut up and read. For being the old camera, this one is really good. The words are whats important anyway, silly picture booker.

I had a hexi-coil put in when i failed to extract a stud on my own and made a bad situation worse.

https://www.miataturbo.net/attachmen...ine=1357495000

https://www.miataturbo.net/attachmen...ine=1357495122



I also found some detonation:

https://www.miataturbo.net/attachmen...ine=1357495122

https://www.miataturbo.net/attachmen...ine=1357495122


and some more battle scars:

http://www.boostedmiata.com/headwork...oute%20015.JPG

I enjoy the how-to posts and think they add appreciable value to the forum.

I have read, and its very informative and detailed, makes life easy for everybody who wants to attempt these jobs, and about the camera, I was merely making a joke, chill the fuck out.