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Piston Pin

By Daniel Dillon, April 27, 2009

The piston pin connects the piston to the connecting rod. It allows the connecting rod to pivot while the piston moves up and down in the cylinder.

Symptoms of a Bad or Failing Piston Pin

  • Knocking or slapping noise from inside engine

Piston Pin Related Repair Advice

  • Failure of a piston pin commonly results in internal engine damage requiring replacement of the engine
  • A "short block" replacement may also be recommended—this replacement only includes the lower parts of the engine and leaves out the cylinder head and intake manifold

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