Carbon buildup on pistons can cause decreased performance and even engine failure. Here are four easy steps to cleaning carbon off pistons:

  1. Remove the piston from the engine.
  2. Pour a pot of boiling water onto the piston and let it sit for 30 seconds.
  3. Remove the piston from the pot and place it in a bowl of ice water to cool down.
  4. Use a wire brush to scrub off any carbon buildup on the surface of the piston. ..