In Mcmaster Carr speak they are called "Helical Inserts".
   Available in both metric and English sizes. Come in a kit with the drill
   and special tap. I think those pan bolts are 6 mm.

   Also "Thread Inserts" that require a some what larger installation
   holes.

   Other than the oil leak how is the p-port engine running.

   Paul Lamar ...No rotor no motor.

Paul is giving you good advice, I would like to offer you an
alternative.  strongly suggest you investigate Time Sert Inserts. You
can find them on the web. They use a patented syncronozied thread, they
take the same size tap as a helicoil. These are the finest and strongest
inserts you can get. PERIOD.
Bill Jepson



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