S-91
03-M Series, WSM
DIESEL ENGINE
[2] SERVICING
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a feeler gauge.
2. Measure the clearance between the outer rotor and the pump
body with a feeler gauge.
3. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
W1035296
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 width of the press
gauge with a sheet of gauge.
4. If the clearance exceeds the factory specifications, replace oil
pump rotor assembly.
W1035444
Clearance between
inner rotor and outer
rotor
Factory spec.
0.03 to 0.14 mm
0.0012 to 0.0055 in.
Clearance between
outer rotor and pump
body
Factory spec.
0.11 to 0.19 mm
0.0043 to 0.0075 in.
Clearance between
inner rotor and cover
Factory spec.
0.105 to 0.150 mm
0.00413 to 0.00591 in.
KiSC issued 08, 2012 A
