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Review on TimeSert Spark Plug #4212 Thread Repair Kit M12x1.25 by Lamar Marshall

Revainrating 5 out of 5

The only method to consider when repairing spark plug wells

A very intelligent system that makes driver level repairs affordable for the average person. Self-leveling tools simplify the process. The repair leaves a strong steel spark plug bore liner that has been expanded to capture and seal the base metal. Modest maintenance and a new bore are good for the remaining life of the engine.

Pros
  • Few competitors
Cons
  • Almost everything is fine