1-S78
ZD321, ZD326, ZD331, WSM
ENGINE
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.
W10381420
Clearance between Rotor and Cover
1. Put a strip of plastigage 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 oil
pump rotor assembly.
W10382660
(7) Oil Pump (D1005-E2-ZD, D1305-E3-ZD)
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a feeler gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
W10355630
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a feeler gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
W10356560
Clearance between Rotor and Cover
1. Put a strip of plastigage 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.
W10357320
Clearance between
outer rotor and pump
body
Factory spec.
0.070 to 0.15 mm
0.0028 to 0.0059 in.
Clearance between rotor
and cover
Factory spec.
0.0750 to 0.135 mm
0.00296 to 0.00531 in.
Rotor lobe clearance Factory spec.
0.060 to 0.18 mm
0.0024 to 0.0070 in.
Clearance between
outer rotor and pump
body
Factory spec.
0.100 to 0.180 mm
0.00394 to 0.00708 in.
Clearance between rotor
and cover
Factory spec.
0.025 to 0.075 mm
0.00099 to 0.0029 in.
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