BogusSVO
02-23-2010, 11:17 AM
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.
Original Poster: BogusSVO
Difficulty: 4 out of 10
Time to install: depends on location of stripped hole, avg about 5 mins
Brief Explanation: methoud used for replacing stripped threads in bolt holes
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/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/DSCF4383.jpg
Install the drill bit into the drill motor, and drill the hole out.
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/DSCF4385.jpg
Blow out the hole with compressed air
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/DSCF4389.jpg
Next take the heil-coil tap
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/DSCF4395.jpg
make sure to counter sink the top of the heil coil by a thread or two
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/DSCF4390.jpg
All done and ready to have the part bolted back!
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.
Original Poster: BogusSVO
Difficulty: 4 out of 10
Time to install: depends on location of stripped hole, avg about 5 mins
Brief Explanation: methoud used for replacing stripped threads in bolt holes
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/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/DSCF4383.jpg
Install the drill bit into the drill motor, and drill the hole out.
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/DSCF4385.jpg
Blow out the hole with compressed air
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/DSCF4389.jpg
Next take the heil-coil tap
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/DSCF4395.jpg
make sure to counter sink the top of the heil coil by a thread or two
http://i261.photobucket.com/albums/ii49/BogusSVO/How%20to/how%20to%202/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/ii49/BogusSVO/How%20to/how%20to%202/DSCF4390.jpg
All done and ready to have the part bolted back!