TIME-SERT J-42385-300 Cadillac Northstar Main Bolt Thread Repair Kit M10x1.5

Includes Free Shipping. *Note this is NOT for headbolts! The numbers are similar but this is for main bolt thread repair. The TIME-SERT J-42385-300 main bolt thread kit for 1996, 1997, 1998, 1999, 2000, 2001, 2002 & 2003 GM Cadillac Northstar 4.6 engines and the Oldsmobile 4.0 Northstar engine. It uses a steel bushing type insert that accepts a size M10x1.5mm (10 millimeter by 1.5 millimeter) main bolt. The Time Sert thread repair method is different from the popular Heli-Coil method, because it is held more securely (from the bottom) and uses a thicker insert rather than a coil of wire like the Helicoil. TIME-SERT is the GM Powertrain recommended thread repair procedure to fix aluminum blocks. Steel is ten times stronger than aluminum. 

*Note The J-42385-300 is for a "first time" repair which means it has never had a repair insert (like a failed Helicoil) or any other kind installed previously.

GM recommends TIME-SERT and is the only authorized repair from General Motors Corporation. The kit comes with a quantity of 10. The block takes a total of 20 inserts so it's important to purchase 10 more inserts to have enough to repair the whole block. As mentioned, TIME-SERT is the ONLY recommended repair for the Northstar.

Time Sert J-42385-300 Head Bolt Thread Repair Kit Includes: 

Qty  Tool Item Number

1      Drill Fixture 

1      Drill Bushing

1      Alignment Pin

3      Bolts

1      Step Drill

1      Tap

1      Insert Driver

1      6020 Loctite

1      6010 Driver Oil

10    101522 M10x1.5mm Replacement Inserts 

1      Laminated Instruction card.

 See the Time-Sert J-42385-300 Thread Repair Kit Instructions pdf - Also see the YouTube video linked above for more tips for a proper repair.

*Note TTY head bolts should be replaced as per auto repair manual. Reusing old main bolts could cause repeat failure.

Cadillac Northstar Engines - A total of 20 inserts are needed and included for the Northstar engines if repairing entire block.