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-   -   How to install a Heli-Coil (http://www.fordrangerforum.com/how-to-submissions/8050-install-heli-coil.html)

BogusSVO 02-16-2010 03:36 PM

How to install a Heli-Coil
 
How to install a Heil-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 heil-coil kit, the heil-coil tap, install tool, and the heil-coil insert.
http://i261.photobucket.com/albums/i...2/DSCF4384.jpg

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

http://i261.photobucket.com/albums/i...2/DSCF4383.jpg

Install the drill bit into the drill motor, and drill the hole out.
http://i261.photobucket.com/albums/i...2/DSCF4385.jpg
Blow out the hole with compressed air
http://i261.photobucket.com/albums/i...2/DSCF4389.jpg
Next take the heil-coil tap
http://i261.photobucket.com/albums/i...2/DSCF4386.jpg

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

On aluminum use a cutting fluid.
http://i261.photobucket.com/albums/i...2/DSCF4388.jpg
Keep the tap straight and square to the work piece.
Blow the hole out again
Now put the insert on the install tool
http://i261.photobucket.com/albums/i...2/DSCF4393.jpg
Now carefully screw the insert into the threads that were just cut, being careful not to apply too much force and skip a thread.

http://i261.photobucket.com/albums/i...2/DSCF4395.jpg

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

http://i261.photobucket.com/albums/i...2/DSCF4397.jpg

Once the insert is in properly, snap the bottom tab off and blow it out of the hole.
http://i261.photobucket.com/albums/i...2/DSCF4390.jpg

All done and ready to have the part bolted back!

STL 02-16-2010 04:12 PM

Could also add that this can be done for a bolt hole that has been stripped out


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