Tools Required

Tools Required

• J 42385-2000  Thread Insert Kit. See Special Tools .
• J 42385-2030  M11 x 2. See Special Tools .0 Cylinder Head Bolt - Northstar/Premium V8 Thread Repair Kit
• J 43965  Thread Repair Extension Kit. See Special Tools .

The thread repair process involves a solid, thin walled, self-locking, carbon steel, bushing type insert. During the insert installation process, the installation driver tool cold-rolls the bottom internal threads and expands the bottom external threads of the insert into the base material. This action mechanically locks the insert into place.

The drill bit and counter bore tool from the tool kit J 42385-2000  and J 42385-2030  is designed for use with either a suitable tap wrench or drill motor. See Special Tools . Limited access and larger hole repair may process better using a tap wrench. An extension from kit J 43965  may also be necessary to drive the thread repair tooling dependent on access to the hole being repaired. See Special Tools . Use only a tap wrench when tapping the hole and during installation of the insert.

It is critical that the drilling, counterboring and tapping of the hole to be repaired follows the same centerline as the original hole.

During the drilling and tapping of the hole being repaired ensure the tooling is consistently machining perpendicular to the surface of the base material.

If the threaded hole being repaired has a base surface perpendicular to the hole centerline, tapping guides are available to aid in tapping the hole.

Tap Size	Tap Guide	Tape Size	Tape Guide	Tap Size	Tape Guide
-	J 42385-	-	J 42385-	-	J 42385-
6 x 1.0	729	10 x 1.5	731	14 x 1.5	736
8 x 1.25	730	12 x 1.5	732	20 x 1.5	737