Engine Lubrication: Description and Operation

Oil feed to cylinder head








The quantity of oil supplied to the cylinder heads is regulated in each case by a 4 mm oil restrictor (a).
As of 09/1993
engine number 120 980 2 022 862
120 981 2 003 814
the oil restrictors are no longer press-fitted as separate parts into the cylinder head, but are cast together with the cylinder head and then widened by drilling to 4 mm.