Oil Pump - wsm wg972-e4 Workshop Manual

WG972-E4, WSM

(7) Oil Pump

Correcting Cylinder (Oversize)
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
Factory specification
Cylinder liner I.D.
Allowable limit
Hone to 2.2 to 3.0 µmRz
Finishing
(87 to 110 µin.Rz)
2. Replace the piston and piston rings with oversize ones.
Oversize: 0.5 mm (0.02 in.)
Marking: 05
NOTE
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
(1) Cylinder I.D. (Before Correction)
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.
Rotor lobe clearance Factory specification
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 outer
Factory specification
rotor and pump body
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.
Clearance between rotor
Factory specification
and cover
1-S57
ENGINE
75.000 to 75.019 mm
2.9528 to 2.9535 in.
75.150 mm
2.9587 in.
(2) Cylinder I.D. (Oversize)
9Y1211108ENS0098US0
0.030 to 0.14 mm
0.0012 to 0.0055 in.
9Y1211108ENS0099US0
0.070 to 0.15 mm
0.0028 to 0.0059 in.
9Y1211108ENS0100US0
0.0750 to 0.135 mm
0.00296 to 0.00531 in.
9Y1211108ENS0101US0
KiSC issued 07, 2015 A