When using solvents, acids, or alkaline
manufacturer's recommendations for use.
Wear goggles and protective clothing.
Soak the parts in a kerosene emulsion based cleaner
designed to remove carbon. The cleaner must have a pH
of 9.5 or less to avoid turning aluminum parts black. The
cleaner manufacturer or supplier can be contacted about
solution concentration, temperature and soak time.
Do not use a scraper to remove carbon and
scale; the sealing surfaces can be damaged.
The parts can be scrubbed with a stiff non-metallic bristle
Inspect for Reuse (012-104-007)
Visually inspect the intake and exhaust valves for cracks
Measure the flatness of the intake and exhaust valves.
Both valves must be flat within 0.03 mm [0.001-inch].
Replace valves if cracked, damaged, or not flat.
Install new valves.