Oil Pump Inspection

Using a dial indicator, measure the inside diameter of the oil pump body bushing.

Maximum inside diameter:

38.188 mm (1.504 in.)

1. If the inside diameter is greater than the maximum, replace the oil pump body.
   

Using a dial indicator, measure the inside diameter of the stator shaft bush.

Maximum inside diameter:

Front side:

21.577 mm (0.850 in.)

Rear side:

32.08 mm (1.263 in.)

1. If the inside diameter is greater than the maximum, replace the stator shaft.
   

Push the driven gear to one side of the body.

Using a feeler gauge, measure the clearance.

Standard body clearance:

0.10 to 0.17 mm (0.00039 to 0.00067 in.)

Maximum body clearance:

0.17 mm (0.0067 in.)

1. If the body clearance is greater than the maximum, replace the drive gear, driven gear or pump body.
   

Using a feeler gauge, measure the clearance between the driven gear teeth and drive gear teeth.

Standard tip clearance:

0.070 to 0.150 mm (0.0028 to 0.0059 in.)

Maximum tip clearance:

0.150 mm (0.0059 in.)

1. If the tip clearance is greater than the maximum, replace the drive gear, driven gear or pump body.
   

Using a steel straightedge and feeler gauge, measure the side clearance of both gears.

Standard side clearance:

0.02 to 0.05 mm (0.0008 to 0.002 in.)

Maximum side clearance:

0.05 mm (0.002 in.)

There are 5 different thicknesses for the drive and driven gears.

Standard drive and driven gears thickness:

Mark	Thickness
0	10.74 to 10.749 mm (0.4228 to 0.4232 in.)
1	10.75 to 10.759 mm (0.4232 to 0.4236 in.)
2	10.76 to 10.77 mm (0.4236 to 0.424 in.)
3	10.771 to 10.78 mm (0.4241 to 0.4244 in.)
4	10.781 to 10.79 mm (0.4244 to 0.4248 in.)

1. If the side clearance is greater than the maximum, replace the drive gear, driven gear or pump body.
   

Make sure the drive gear rotates smoothly.