Water Pump: Application and ID

NOTE: On the engines 116.962/963 and 117.962/963 the bypass duct below the thermostat was changed in the coolant pump housing.

This reduces fluctuations of the temperature indication between 80-100 °C. The opening (2 and arrow) in the shape of a circular sect ion was converted into a circular opening with 30 mm dia. (1 and arrow).

This change is subsequently possible by drilling the web and the cast skin with a 3 mm drill. The aluminum chips must be extracted with a vacuum cleaner.


Production breakpoint: Circular opening: August 1962




A coolant thermostat from a 2nd manufacturer was optionally installed in the engines 116.962/963 and 117.962/963 as of August 1982.


Distinguishing features on coolant thermostat





Production breakpoint: Optionally as of August 1982