Expansion/Freeze Plug: Service and Repair

NOTE: Core holes in cylinder crankcase are closed with sheet metal covers (34 mm dia.).

Replace leaking closing covers on principle.






Driving direction left






Driving direction right


At the right (driving direction) the closing plug (M 38 x 1.5) remains in place.

This core hole can be used to insert cooling water preheater.






Transmission end


Replacement





Drain plug on cylinder crankcase

1 Completely drain coolant.
2 Remove components which obstruct access (e.g. transmission, intermediate flange, injection pump etc.).






3 Position a chisel with a narrow blade or a screwdriver into deep drawn edge of closing cover.






4 Carefully knock closing cover on one side down until cover has turned around its own longitudinal axis (approx. 90°).






5 Position water pump pliers against flange of projecting section and pull out closing cover.






6 Thoroughly clean core hole from residue. Sealing surface should be free of grease (arrow).
7 Coat core hole with sealing glue, part no. 002 989 94 71.






8 Knock-in new closing cover by means of mandrel.
9 Attach removed components.
10 Add coolant.


NOTE: The sealing glue should cure for approx. 45 minutes before adding coolant.

11 Run engine warm and check for leaks.