The replacement of the crankshaft oil seals of the M73 engine is carried out in the same way as the replacement of the oil seals of the M60 engine (see Section Replacing the crankshaft seals).
1. When replacing the right ignition distributor housing seal, remove the one-way valve on the side of cylinders Nos. 1-6.
2. Remove the air cleaner housing (see Section Removing and installing the air cleaner housing Chapters Power supply and exhaust systems).
3. Release the protective casing of the ignition distributor from the clamps.
4. Turn out bolts and remove a cover of the distributor of ignition.
5. Turn out bolts and remove a rotor of the distributor of ignition.
6. Turn out a bolt and remove a leader of a rotor.
7. Turn out bolts and remove the case of the distributor of ignition.
8. Carefully remove the radial O-ring being careful not to damage the mating surfaces.
9. Clean the mating surfaces of the distributor housing and timing chain cover, install new gasket with a sealing strip to the ignition distributor housing.
10. Connect seal to tool #11 3 200 complete with tool #00 5 500.
11. Install tool No. 11 3 220 on the camshaft and center the ignition distributor housing (1) relative to the camshaft using tool No. 11 3 210.
12. Further installation is carried out in the reverse order. Use new copper washers of bolts of fastening of the case of the distributor of ignition. Leash (1) should be inserted into the recess (2) camshaft.