GZD15, WSM ENGINE
1-S51
(2) Servicing
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and
the outer rotor with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
Clearance between Rotor and Cover
1. Put a strip of plastigage (Code No. 07909-30241) onto the
rotor face with grease.
2. Install the cover and tighten the screws.
3. Remove the cover carefully, and measure the amount of the
flattening with the scale and get the clearance.
4. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
Rotor lobe clearance Factory spec.
0.03 to 0.14 mm
0.0012 to 0.0055 in.
0000000915E
Clearance between
outer rotor and pump
body
Factory spec.
0.07 to 0.15 mm
0.0028 to 0.0059 in.
0000000916E
Clearance between
rotor and cover
Factory spec.
0.075 to 0.135 mm
0.00295 to 0.00531 in.
0000000918E
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