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, oil pump chain guide, and oil pump chain tensioner.

• An efficient and compact five-lobe epitrochoid and six-flank inner envelope type 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})
Item	Engine speed [rpm]	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}
Relief valve opening pressure (reference value)		450-550 {4.59-5.61, 65.3-79.8}	420-520 {4.28-5.30, 60.9-75.4}

• A silent chain (link connecting type) has been adopted to 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 sintered material in the oil pump sprocket has been furnace hardened to improve durability.

Oil pump driven chain, oil pump sprocket specification


Item		Specification (mm {in})
Item		L8	LF
Oil pump driven chain	Pitch size	8 {0.3}
Oil pump sprocket	Outer diameter	60.78 {2.392}
Oil pump sprocket	Driven tooth width	6.15 {0.242}