Here's how i maintain my pistons and engine block etc clean and in tiptop shape. this is aggressive cleaning---> I inject about 2ml of Techron or Seafoam inside the spark plug hole, put the spark plugs back (without attaching the wires) and crank the engine for 3 seconds allowing the techron to scatter all over the pistons and the walls of the chamber, and will ease sticky valves... let it sit overnight ehile it does it's job of dissolving all the carbon deposits , attach all plug wires . Then drive the next morning.

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