Measuring End Play Of Rotor And Pump Case; Measuring Clearance Between Outor Rotor And Pump Case; Reassembling Oil Pump; Inspecting Relief Valve - Mitsubishi S3Q2 Service Manual

LUBRICATION SYSTEM

2.3 Measuring end play of rotor and pump case

Measure the end play of the rotor and the pump case. If
measured value exceeds the limit, replace the oil pump with
new one.
Item
End play of rotor and
pump case [0.0016 to 0.0035 in.]
2.4 Measuring clearance between outor rotor
and pump case
Measure the clearance between the outer rotor and the pump
case. If measured value exceeds the limit, replace the oil
pump with new one.
Item
Clearance between outer
rotor and pump case

2.5 Reassembling oil pump

(1) Install the pump case cover to the pump case with
aligning the match marks (indentations). If the match
marks are not aligned, the oil pump will not suck up oil.
(2) Install the oil strainer, and tighten the bolt.

2.6 Inspecting relief valve

(1) Check the relief valve and its valve seat for contact
condition. Check the spring for fatigue and damage. If
it is faulty, replace the relief valve with new one.
(2) Measure the valve opening pressure (oil pressure when
the engine is running at rated speed) of the relief valve.
If the measured value is out of the standard, remove the
plug and make an adjustment by increasing and
decreasing the shim thickness.
Engine oil pressure take-out port
Next to the oil filter Rp 1/8 thread (PS 1/8)
Item
Relief valve opening pressure
9-6
Standard Limit
0.04 to 0.09 mm 0.15 mm
[0.0059 in.]
Standard Limit
0.20 to 0.28 mm 0.50 mm
[0.0079 to 0.0110 in.] [0.0197 in.]
Standard
0.3 to 0.4 MPa {3 to 4 kgf/cm²}
[42.67 to 56.89 psi]
Measuring end play of rotor and pump case
Measuring clearance between outer rotor and pump
case
Match mark
Match mark of pump case and pump case cover
Plug
44 ± 5 N·m
{4.5 ± 0.5 kgf·m}
[33 ± 3.6 lbf·ft]
49 ± 5 N·m
{5 ± 0.5 kgf·m}
[36 ± 3.6 lbf·ft]
Relief valve
Installing relief valve
Shim
Gasket