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turning the dry friction on the surface into liquid friction between lubrication oil particles, thus
mitigating part wearing, cooling down parts with high thermal load, absorbing impact from
bearing and the elements and consequently reducing noises, increasing tightness between
cylinder ring and wall, and cleaning and taking away foreign matters from surface of parts.
Precautions:
After engine oil pump is disassembled, carefully clean its parts and purge the surface with high-pressure gas.
To disassemble engine oil pump, it is important to prevent any foreign matter from falling into crankcase.
Standard Value and Allowable Limit of Reference Items
Item
Standard
Allowable limit
Engine oil
capacity
For changing oil
1L
-
For disassembly
1.2L
-
Pump rotor
Radial stroke between inner and
outer rotors
Oil pressure
pump
0.025-0.175
0.23
Oil suction
pump
0.025-0.175
0.23
Stroke between outer rotor and
pump
Oil pressure
pump
0.11-0.163
0.22
Oil suction
pump
0.11-0.163
0.22
Rotor face-to-face stroke
Oil pressure
pump
0.05-0.11
0.15
Oil suction
pump
0.05-0.11
0.15
9.2 Fault Diagnosis
Engine oil decreases
Engine oil is consumed naturally.
Engine oil leakage
Engine damaged
No or too low oil pressure
Oil circuit clogged.
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