CAUTION: Do not use a caustic cleaning solution or a wire brush to clean pistons.

Remove deposits from the piston surfaces. Clean gum or varnish from the piston skirt, piston pins, and rings with solvent.

Clean the ring grooves with Piston Ring Groove Cleaner D81L-6002-D or equivalent, or a broken ring. Ensure oil ring slots (or holes) are clean.

Using a gasket scraper, carefully remove carbon deposits from piston dome.

Owner caption January 2005 · Photo 104 of 980