Inspection and Reconditioning (Rev 1/97)
60
Checking Clearance Between
Oil Pump Body and Outer Rotor
Checking Clearance Between
Inner Rotor and Outer Rotor
4. Check the clearance between the rotor plate and both
rotors. Place a straight edge across the oil pump body
and insert a feeler gauge between the straight edge and
the rotors. The standard dimension is .0012 to .0035 in.
(0.030 to 0.090 mm). The wear limit is .0051 in. (0.130
mm). If the clearance between the rotor plate and either
rotor exceeds the wear limit, replace the oil pump.
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Checking Clearance Between
Rotor Plate and Rotors
5. Measure the outside diameter of the rotor shaft and the
inside diameter of the rotor shaft bore in the rotor plate.
Subtract the diameter of rotor shaft from the diameter
of the rotor shaft bore to obtain the rotor shaft clear-
ance. Refer to Specifications for the standard dimen-
sion. The wear limit is .0079 in. (0.200 mm). If the
rotor shaft clearance exceeds the wear limit, replace the
oil pump.
6. Hold the oil pump body in one hand and the oil pump
gear in the other hand. Move the rotor shaft around to
check the fit between the rotor shaft and the oil pump
body. If it is loose or wobbly, replace the oil pump.
Oil Pressure Control Valve
The oil pressure control valve is adjusted and assembled at
the factory. Do not disassemble the control valve unless
there is reason to believe it is defective. To disassemble the
valve, remove the spring retainer from the valve body and
remove the spring and the piston.
Replace the oil pressure control valve if any of the compo-
nents show significant wear or damage, or if the piston does
not move freely in the valve body.
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