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The Time-Sert 1812 CORE BS M8 x 1.25mm metric GM Rocker Arm thread repair kit is for second time thread repair. Use the Time Sert 1812 CORE BS thread repair kit when an initial thread repair has failed.
The Mechanic Doing The Repair Will Have To Set The Counterbore Depth Manually By Hand. The Five Included Big Sert 58121 inserts With A Metric Length Of 11.7mm Are Held In Place By The Installation Driver Cold Rolling The Bottom Of The Insert, Locking The Insert In Place.
If you are doing a first time thread repair you will need to purchase the Time-Sert 1812 CORE thread repair kit.
Time-Sert 1812 CORE BS Thread Repair Kit Contains: