OIL PUMP CONSTRUCTION[L3 Turbo]

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•  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.
•  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.
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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.
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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}