Remove carbon from the housings with extra fine emery paper. If you use a carbon scraper, be very careful not to damage the finished surfaces of the housing. Remove the sealant remnants with a cloth or brush soaked in a solution of ketone or thinner.
Remove carbon from the inner surface of the rotor housing by wiping it off with a cloth. Soak the cloth in a solution of ketone or thinner, if the carbon is difficult to remove. Rust deposits should be carefully removed from the cooling water passages on the housing. Remove sealant remnants with a cloth or brush soaked in ketone or thinner. Be careful not to remove the felt tip pen marks made while disassembling the engine.
Remove carbon with a carbon remover or extra fine emery paper. Clean the rotor in a standard cleaning solution and blow dry with compressed air.
WARNING
Do not use emery paper on the apex or side seal grooves. The side surfaces are
coated with a very soft material. Do not use excessive pressure on these surfaces
while cleaning. Lightly polish them.
Gas seals can be cleaned in a standard cleaning solution. Never attempt to clean seals with emery paper or you will ruin them. Be careful not to damage the seals or springs while handling them. Do not mix up the seals and springs when cleaning.
Immerse the shaft in cleaning solution and blow the oil passages dry with compressed air. Apply a light film of clean engine oil to the shaft to prevent rusting.