Oil Pump

INSPECTION AFTER DISASSEMBLY
Oil Pump Clearance





^ Measure the clearance with feeler gauge.
^ Clearance between oil pump outer rotor and oil pump body (position "1 ")
Standard : 0.114 - 0.260 mm (0.0045 - 0.0102 inch)
^ Tip clearance between oil pump inner rotor and oil pump outer rotor (position "2")
Standard : Below 0.180 mm (0.0071 inch)





^ Measure the clearance with feeler gauge and straightedge.
^ Side clearance between oil pump inner rotor and oil pump body (position "3")
Standard : 0.030 - 0.070 mm (0.0012 - 0.0028 inch)
^ Side clearance between oil pump outer rotor and oil pump body (position "4")
Standard : 0.050 - 0.110 mm (0.0020 - 0.0043 inch)
^ Calculate the clearance between oil pump inner rotor and oil pump body as follows:





OIL PUMP BODY INNER DIAMETER
^ Measure the inner diameter of oil pump body with inside micrometer. (Position "5")

OIL PUMP INNER ROTOR OUTER DIAMETER
^ Measure the outer diameter of protruded portion of oil pump inner rotor with micrometer. (Position "6")

OIL PUMP INNER ROTOR TO OIL PUMP BODY CLEARANCE
^ (Clearance) = (Oil pump body inner diameter) - (Oil pump inner rotor outer diameter)
Standard : 0.045 - 0.091 mm (0.0018 - 0.0036 inch)
^ If measured/calculated values are out of the standard, replace oil pump assembly.

Regulator Valve Clearance





(Clearance) = (Valve hole diameter) - (Regulator valve outer diameter)
Standard : 0.040 - 0.097 mm (0.0016- 0.0038 inch)
^ If the calculated value is out of the standard, replace oil pump assembly.

CAUTION:
^ Coat regulator valve with engine oil.
^ Make sure that it falls smoothly into valve hole by its own weight.

ASSEMBLY
Note the following and assemble in the reverse order of disassembly.





^ Install oil pump inner rotor with the groove faced to oil pump cover side.