Repair Damaged Or Worn Threads

WARNING: This page is about a different car, the 2024 Jeep Grand Cherokee L. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Be sure that the tapped holes maintain the original center line.

Damaged or worn threads cannot be repaired in the following locations:

Spark plug threads in the cylinder head.
Camshaft bearing cap attaching threads.
Crankshaft main bearing cap bolt threads in the engine block.
Cylinder head bolt holes in the engine block.

Damaged or worn threads can be repaired. Essentially, this repair consists of:

Drilling out worn or damaged threads.
Tapping the hole with a special Heli-Coil Tap.
Installing an insert into the tapped hole to bring the hole back to its original thread size.