A piston pin does a couple of jobs at the same time. It properly secures a piston to a connecting rod, while allowing the connecting rod to pivot when the piston goes up and down.
Signs of a bad piston pin
- Abnormal noises (knocking or slapping) from the engine
Piston pin repairs and maintenance
- Piston pins are not a part of your routine maintenance. However, you should check and replace them if needed whenever the engine is rebuilt.
- Failed pistons lead to serious internal engine damage, which is why an entire engine replacement may be required.
- If the cylinder head is not damaged by a failed piston pin, you can replace the engine block (short block) instead of purchasing a new or remanufactured engine.