🔧 Heli-Coil 554612 M12 X 1.75 Metric Kit: Thread Repair Solution for Durable Connections Review

The kit is complete but note that the inserts are not very long. You can order longer inserts online if you really need them for things like head bolts or spark plugs. I've compromised on 4 stars as I didn't need to use this particular kit after all and the rating reflects my use of the products in the somewhat distant past. I work on some older cars and unfortunately many mechanics don't use torque wrenches.

I used this kit on my 2004 Jeep Grand Cherokee to fix a broken bolt. This kit requires the purchase of a drill, which is usually listed under the 'Items purchased together' tab as it is not included with the kit. I followed the instructions I read on an online forum and this set worked great! In the end, everything turned out to be much easier than I expected. I recommend using threadlock on the insert to ensure it doesn't move. I haven't had any problems with it, just as a precaution. Overall…

Worked well enough to fix a used Delta drill. The previous owner glued one of the handles into the (discontinued) gearbox. The handle barely screwed into what was left of the thread and dangled heavily. After using the recommended drill bit, the HeliCoil kit cut the existing gear very well. The HeliCoil insert went in easily and the handle screwed in well. I didn't snap off the end of the spool, which helped create a grip for the handle. If you didn't know the drill was fixed, you'd never know…

Very happy with the result of this kit. I ripped out the bolt hole on a Brembo caliper and this kit worked great to fix it. Was able to straight drill the hole with a recommended Vermont American 31/64 bit in a hand drill with a caliper in a vise. Cleaned the hole and sprayed the Remington Gun Oil I had on hand to lubricate the faucet. I lowered the faucet a quarter turn at a time using a 12 point 11mm socket and then turned it slightly, slowly but the threads cut perfectly. Then cleaned again…

Pros: Works great! Permanent solution for about $50 in installments. I calculated that it would cost about $500 to replace an oil pan at a shop (or $80-200 for an oil pan change and a lot of time if I do it myself). Cons: There are no instructions in the heli coil packaging. , I had to search the web for a heli coil catalog and then search for this model to find you needed a 31/64 inch metal drill bit and Permatex "red" threadlocker (not required but better to stop leaks to avoid tools for…

Good enough to fix a used Delta Drill. The previous owner glued one of the handles into the (discontinued) gearbox. The handle barely screwed into what was left of the thread and dangled heavily. After using the recommended drill bit, the HeliCoil kit cut the existing gear very well. The HeliCoil insert went in easily and the handle screwed in well. I didn't snap off the end of the spool, which helped create a grip for the handle. If you didn't know the drill was fixed, you'd never know about…

Very happy with the result of this kit. I cut a bolt hole in a Brembo caliper and this kit worked great for the repair. Was able to straight drill the hole with a recommended Vermont American 31/64 bit in a hand drill with a caliper in a vise. Cleaned the hole and sprayed the Remington Gun Oil I had on hand to lubricate the faucet. I've lowered the faucet a quarter turn at a time using a 12 point 11mm socket and then turned it slightly slowly, but the thread cuts perfectly. Then cleaned again…

Pros: Works great! Permanent solution for about $50 in installments. I calculated that it would cost around $500 to replace an oil pan at a shop (or $80-200 for an oil pan change and a lot of time if I do it myself). Cons: No instructions in the heli coil package. , I had to search the web for a heli coil catalog and then search for this model to find you needed a 31/64 inch metal drill bit and Permatex "red" threadlocker (not required but better to stop leaks to avoid tools for heli-coil…