Tools Required

SA91101NE Feeler Gage Set

1. Inspect the body clearance:

1.1.	Using a SA91101NE or equivalent, measure the clearance between the driven rotor and the pump body.

Specification
The service limit body to side clearance maximum is 0.277 mm (0.011 in).

1.2.	If the clearance is greater than the maximum, replace the oil pump assembly.




2. Inspect the tip clearance.

Using a SA91101NE or equivalent, measure the clearance between both rotor tips.

Specification
The standard clearance maximum is 0.15 mm (0.006 in).




3. Inspect the inner end outer gear to housing clearance.

Using a SA91101NE , Plastigage®, or equivalent and a straight edge, measure the oil pump inner and outer gear to housing clearance.

Specification

•	The inner gear to housing service limit clearance is a maximum of 0.08 mm (0.003 in).

•	The outer gear to housing clearance service limit is a maximum of 0.10 mm (0.004 in).




4. Inspect the oil pressure regulating valve, oil pressure relief valve, and the springs for wear and damage.
5. Check the oil pump pressure regulating valve and the oil pressure relief valve for free movement in bores.
6. Replace if worn, damaged, or if the valves do not move freely in the bores.