TIMESERT® Spark Plug Thread Repair

Helicoil Save-A-Thread failure

We receive many questions regarding insert failure, many of which we find are the helicoil or Save-A-Thread spark plug style. The Helicoil spark plug insert is black in color and has a knurl at the top to keep it in place by hitting the top of the insert with a mandrel and a hammer. see below pictures.

The Helicoil insert O.D is .660 inches.
The Reamer in our Kit is .650 inches which means when reaming out the hole to accept our insert the hole will not be completely cleaned up. You would notice some slight scratches where the old helicoil threads existed.
This is not a problem as we will be tapping the hole larger to M18 and install the TIME-SERT Triton insert.
We have been successful in repairing failed helicoil / Save-A-Thread inserts for years with our thread repair system, and without any reported failures.

Ford spark plug repairs use p/n 5553. Foreign vehicles use p/n 5141E , p/n 5141.

Special note: If repairing a Ford with p/n 5553 kit (Do not use the counterbore p/n 55518 )
The 55518 counterbore stops on the original taper seat built into the head. This original taper seat would not exist because it was removed due to the first failed repair with the helicoil / save-A-thread style inserts.
Click here: for more information on counterbore for FORD 2001 and up 1L2E heads.