OIL PUMP CONSTRUCTION [L8, LF]
id0111c6100600
• The oil pump is installed inside the engine front cover. The crankshaft drives the inner rotor through the oil pump chain and oil pump sprocket.
• The oil pump component consists of the oil pump body, oil pump sprocket, oil pump chain, and oil pump chain tensioner.
• A trochoid gear has been adopted on the oil pump.
• The oil pump consists of the inner and outer rotors, relief valve, and oil pump body.
• The oil pump cannot be disassembled. If there is an oil pump malfunction, replace it as a single unit.
Oil pump specification
|
Item
|
Engine speed [rpm]
|
Specification (kPa {kgf/cm2, psi})
|
|
L8
|
LF
|
|
Oil discharge pressure (reference value)
[Oil temperature: 100 °C {212 °F}]
|
1,500
|
129— 269 {1.32—2.74, 18.7—39.0}
|
180— 387 {1.84—3.95, 26.2—56.1}
|
|
3,000
|
234—521 {2.39—5.31, 33.9—75.5}
|
337—591 {3.44—6.03, 49.0—85.8}
|
• A silent chain (link connecting type) has been adopted for the oil pump chain to reduce chain operation noise when the chain and the sprocket engage.
• The engine oil in the engine front cover lubricates the oil pump chain. Wear resistance has been improved using nitriding processing of the pins constructing the oil pump chain.
• The teeth of the sintered material in the oil pump sprocket have been induction hardened to improve durability.
Oil pump chain, oil pump sprocket specification
|
Item
|
Specification (mm {in})
|
|
L8
|
LF
|
|
Oil pump chain
|
Pitch size
|
8 {0.3}
|
|
Oil pump sprocket
|
Outer diameter
|
60.78 {2.392}
|
|
Driven tooth width
|
6.15 {0.242}
|
