2. Remove the drive disc or flywheel.
3. Remove the engine back plate (refer to the accompanying illustration).
4. The old oil seal can be removed without first dismantling its housing by prying it off with a screwdriver; however, to avoid the risk of damaging the crankshaft journal, the authors of this Manual recommend acting in accordance with the instructions below.
5. Unscrew the bolts securing the seal housing to the block and remove the assembly, clean the mating surfaces from fragments of gasket material and old sealant (refer to the accompanying illustration).
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6. Place the removed holder on a workbench on two wooden blocks and knock out the old seal with a punch from the back of the plate (refer to illustration).
7. Wipe the seat for the oil seal with acetone. Place the holder on a flat, hard surface and tap the new oil seal into the seat, using a wooden block or a piece of pipe of a suitable diameter as a mandrel.
8. Lubricate the seal lips with clean engine oil.
9. Carefully press the holder and place it in its regular place. Do not rush, making sure that the seal lips do not twist when putting it on the shaft journal (refer to illustration). Screw in the mounting bolts and tighten them evenly to the required torque.
10. Further installation is carried out in the reverse order of dismantling the components.