Inspection

Fig. 16 Oil pump & Silent Shaft, removal:

Measure Oil Pump Clearances
1. Drive gear to body 0.0043 - 0.0059 in. (0.11 - 0.15 mm)
2. Driven gear endplay
1982---83 models 0.0024 - 0.0047 in. (0.06 - 0.12 mm)
1984---85 models 0.0016 - 0.0039 in. (0.04 - 0.10 mm)

3. Drive gear endplay
1982---83 models 0.0016 - 0.0028 in. (0.04 - 0.07 mm)
1984---85 models 0.0020 - 0.0043 in. (0.05 - 0.11 mm)

4. Drive gear to bearing 0.0008 - 0.0020 in. (0.02 - 0.05 mm)
5. Relief valve spring length 1.850 in. (47 mm)
6. Relief valve spring load 9.5 lbs. @ 1.575 in. (40 mm)

Fig. 28 Oil pump gear alignment:

Align mating marks of drive and driven gears, then prime pump with clean oil and install onto engine.