Valve Cover: Description and Operation

The camshaft covers are made from vinyl-ester plastic; Bank 1 cover incorporates an outlet for the full load engine breather.
The Bank 2 cover incorporates the engine oil filler cap and an outlet for the part load engine breather. Identical oil separators are incorporated inside the top of each cover. Each oil separator comprises a wire gauze packing in an open ended enclosure below the breather outlet.