4 Runner SR5 2WD V6-3.4L (5VZ-FE) (1997)
Piston: Service and Repair
Cleaning
1. Using a gasket scraper, remove the carbon from the piston top.
2. Using a groove cleaning tool or broken ring, clean the piston ring grooves.
3. Using solvent and a brush, thoroughly clean the piston.
CAUTION: Do not use a wire brush.