How To: install a Heli-Coil
Written By: bogussvo
Discussion Thread: 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! |
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