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How do you remove pistons from an engine?

Published in Engine Repair 2 mins read

Removing pistons from an engine typically involves several steps after the engine has been partially disassembled. The process, as highlighted in the provided YouTube reference, includes removing the connecting rod caps and then pushing the pistons out from the cylinder bore.

Here's a detailed breakdown of the process:

Steps to Remove Pistons

  1. Preparation: Ensure the engine is partially disassembled, with the cylinder head and oil pan removed.
  2. Connecting Rod Cap Removal: Remove the connecting rod caps from the connecting rods attached to the pistons you intend to remove.
  3. Pushing the Piston Out:
    • Using a broom handle (or a similar tool), gently push the piston out from the top of the cylinder bore. The YouTube reference mentions using a broom handle for this.
    • Be mindful of the connecting rod as it exits the bottom of the cylinder.
  4. Catching the Piston: As the piston is pushed out, use your hand to catch it to prevent it from falling and potentially getting damaged. According to the reference, this step is crucial to protect the piston.
  5. Inspection: After removing each piston, inspect it for any signs of wear or damage.

Important Considerations:

  • Cleanliness: Keep all parts clean to prevent contamination.
  • Marking: Label or mark the pistons and connecting rods to ensure they are reinstalled in the correct cylinders and orientation.
  • Force: Avoid using excessive force, as this could damage the piston, connecting rod, or cylinder bore.
  • Tools: While a broom handle is mentioned, specialized piston removal tools exist and can simplify the process.

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