• REPAIR PLUGS: The ABN Thread Repair Tool Kit is a time-saving kit that allows you to cut threads to fix a stripped and damaged 14mm spark plug threaded hole port and repair plug configurations in aluminum heads; Socket includes metal retainers to keep plug held inside during install and removal
  • VARIOUS APPLICATIONS: Chrome-vanadium steel (CR-V) M14 x 1.25 internal thread size on repair sleeve suitable for damaged spark plug threads to clean and rethread spark plug ports on a BMW vehicle and some Nissan and Toyota engines; As long as the head is aluminum and the spark plug hole is straight with room to turn the tap using either a ratchet or wrench, this kit will allow you to repair plugs without removing the head
  • EASY TO USE: Rotate the crankshaft to make sure no ports/valves are open, use the tap to install new threads, choose the proper depth of insert, and screw it firmly into the newly tapped head; Apply grease on the tap to help catch any metal shavings (rather than letting them drop into the cylinder) and back out the tap out every half turn to every whole turn to clean the metal shavings from the tap; Grease recommended, not included
  • PERFECT SIZE: 14mm reamer with 12 points; 2.5-inch overall length; Use with 3/8-inch drive ratchet or wrench; Inserts sizes are 3/8-Inch, 7/16-Inch, 1/2-Inch, and 3/4-Inch; Tap is tapered to allow the tip to fit and rethread the hole in order for the coil to fit; Measure your plug diameter, thread, and pitch to see if this kit is compatible
  • PACKAGE CONTENTS: Rethread kit includes a tapping reamer and 4 different depths of inserts for your convenience

Just what the doctor ordered. had one of these years ago and loaned it to a friend. It never made it back home. very happy with the replacement.

Worked like a well behaved golden retriever.

Ofcorse it takes some work but it'll be fixed in no time. And aluminum isn't magnetic so take it apart first...

I used this to rethread a sparkplug hole on a Honda Clone (predator) 212cc motor. At first, its a lot of work! It may seem like its not work, and stripping the first 10 threads on the tap. On my motor, the spark plug hole was slightly tapered so you must cut through all that first to make it even. Just when your about to give up, Keep going! eventually it will work! Took me over an hour and some muscle! Worked out well !!! cheap fix! use a Red Locktite to seal it!

Tools look fine ,however we have not used them yet.

This kit makes a strong repair without removing the head. You must rotate rhe crank shaft to make sure no ports/valves are open them simply tap the new threads with the included tap, choose the proper depth of insert, (4 depths included in the kit), then coat the insert outer threads with high temp thread locker then screw it firmly into the newly tapped head. It helps to use a good spark plug to properly torque the insert in place. You can use compressed air and a shop vac with a drinking straw attached to the suction hose, adapted down to staw size to remove any aluminum that fall inside, (the reason you must insure all ports/valves are closed). Allow the thread locker to dry then install a new plug and torque to spec, much less than a cast iron head.

Worked well for me, you just need to remember to have the cylinder that your working on at TDC (top dead center) so all the valves for that cylinder are closed (so no metal shavings get in the valve openings). Also make sure and put grease on the tap to help catch any metal shaving (rather than have them drop into the cylinder. Moreover, make sure you back the tap out every ½ turn to every whole turn as to clean the metal shavings from the tap and to re-grease it. I myself actually used an impact gun set to low speed to run the tap though (you may want to do it by hand with a ratchet). However, either way, just take your time and you shouldn’t have any problems using this product.