Oil Pump: Testing and Inspection
INSPECTION1. Inspect body clearance.
Using a feeler gauge, measure the clearance between the driven rotor and pump body.
Standard clearance: 0.10 - 0.16 mm (0.0039 - 0.0063 inch)
Maximum clearance: 0.20 mm (0.0079 inch)
If the clearance is greater than maximum, replace the oil pump rotor set and/or pump body.
2. Inspect tip clearance.
Using a feeler gauge, measure the clearance between both rotor tips.
Standard clearance: 0.03 - 0.14 mm (0.0012 - 0.0055 inch)
Maximum clearance: 0.20 mm (0.0079 inch)
If the clearance is greater than maximum, replace the oil pump rotor set.
3. Inspect side clearance.
Using a feeler gauge and flat block, measure the side clearance as shown.
Standard clearance: 2.91 - 2.97 mm (0.1145 - 0.1169 inch)
Minimum clearance: 2.90 mm (0.1142 inch)
If the clearance is greater than maximum, replace the oil primp rotor set and/or pump body.