Removal
1. Raise the car and place vertical supports under it. Remove the gearbox as described in Chapter 7A.
2. Using a marker, mark the original relative position of the drive disk and crankshaft, then unscrew the bolts holding these elements together. If the crankshaft turns, use a screwdriver to jam the gear ring of the drive disk (see _ illustration 11.3).
Note: If there is a ring between the bolts and the drive disk, mark which side it faces toward the disk, then remove.
3. Remove the drive disc from the crankshaft.
Caution: When removing the drive disk, you must wear protective gloves - the edges of the ring teeth may be sharp.
4. Clean the flywheel by removing oil and grease from its surface. Inspect the surface of the disc for cracks and make sure that all ring teeth are present. Place the drive platter on a flat surface to assess the extent of its curvature.
5. Clean and inspect the mating surfaces of the drive disk and crankshaft. If necessary, replace the crankshaft rear oil seal before installing the flywheel.
Installation
6. Place the drive disc on the crankshaft. Make sure that the relative position marks of the elements applied before removal are aligned. It should be noted that some engines require a locating pin or offset bolt hole to align the disc with the crankshaft. Before installing the bolts, coat the threads with anaerobic sealant and, if necessary, install a ring on the drive plate.
7. Tighten the bolts in a cross pattern to the required torque. In this case, it is necessary to jam the crown of the drive disk by inserting a screwdriver between the teeth.
8. If the front pump O-ring/seal located in the transmission is leaking, take advantage of the convenient opportunity to replace it.
9. The remainder of the assembly is carried out in the reverse order of removal.