Engine Block Heater: Service and Repair

Coolant Preheater In Crankcase (Installation Note):

1st Version (A):

2nd Version (B):

NOTE: As of October 1980, the modified screw plug M 38 x 1.5 is installed together with an O-ring.

The chamfer in the crankcase was changed for this reason (2nd version).

When installing a coolant preheater, an O-ring or sealing ring to suit the chamfer in the crankcase should be used.