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.
• 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.
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1
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Oil pump body (relief valve inside)
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2
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Oil pump chain tensioner
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3
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Oil pump chain guide
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4
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Oil pump chain
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5
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Oil pump sprocket
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6
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Front
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7
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Inner rotor
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8
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Outer rotor
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9
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Oil in
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10
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Relief valve component
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11
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Rear
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12
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Oil out
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Oil pump specification
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Item
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Engine speed [rpm]
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Specification (kPa {kgf/cm2, psi})
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Oil discharge pressure (reference value)
[Oil temperature: 100°C {212°F}]
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1,500
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156-363 {1.59-3.70, 22.7-52.6}
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3,000
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297-551 {3.03-5.61, 43.1-79.9}
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Relief valve opening pressure (reference value)
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420-520 {4.28-5.30, 60.9-75.4}
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• 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
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Timing chain
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2
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Oil pump driven chain
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3
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Pitch size
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4
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Pin
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5
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Link
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6
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Oil pump sprocket
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7
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Outer diameter
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8
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Driven tooth width
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Oil pump driven chain, oil pump sprocket specification
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Item
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Specification (mm {in})
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Oil pump driven chain
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Pitch size
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7 {0.28}
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Oil pump sprocket
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Outer diameter
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52 {2.05}
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Drive tooth width
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3.1 {0.12}
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