#
OIL PUMP CONSTRUCTION [L3 Turbo]

id0111b21006b4
• 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.

.

1 | Oil pump body (relief valve inside)
2 | Oil pump chain tensioner
3 | Oil pump chain guide
4 | Oil pump chain
5 | Oil pump sprocket
6 | Front
7 | Inner rotor
8 | Outer rotor
9 | Oil in
10 | Relief valve component
11 | Rear
12 | Oil out

Oil pump specification

Item | Engine speed [rpm] | Specification (kPa {kgf/cm2, psi})
--- | --- | ---
Oil discharge pressure (reference value) [Oil temperature: 100°C {212°F}] | 1,500 | 156-363 {1.59-3.70, 22.7-52.6}
3,000 | 297-551 {3.03-5.61, 43.1-79.9}
Relief valve opening pressure (reference value) | 420-520 {4.28-5.30, 60.9-75.4}

• A bush chain has been adopted for the oil pump chain, improving durability during high-output or high-load operation.
• The engine oil in the engine front cover lubricates the oil pump chain. Wear resistance has been improved by furnace hardening 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.

.

1 | Timing chain
2 | Oil pump driven chain
3 | Pitch size
4 | Pin
5 | Link
6 | Oil pump sprocket
7 | Outer diameter
8 | Driven tooth width

Oil pump driven chain, oil pump sprocket specification

Item | Specification (mm {in})
--- | ---
Oil pump driven chain | Pitch size | 7 {0.28}
Oil pump sprocket | Outer diameter | 52 {2.05}
Drive tooth width | 3.1 {0.12}