OIL PUMP CONSTRUCTION[LF, L3]

id0111b5100600

•  The oil pump is installed inside the engine front cover. The crankshaft drives the inner rotor through the oilpump chain and oil pump sprocket.
•  The oil pump component consists of the oil pump sprocket, oil pump chain, oil pump chain guide, oil pumpchain tensioner, and oil pump chain tensioner spring.
•  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 unit..
am3zzn00000793

1
Oil pump body (relief valve inside)
2
Oil pump chain tensioner spring
3
Oil pump chain tensioner
4
Oil pump chain guide
5
Oil pump chain
6
Oil pump sprocket
7
Front
8
Inner rotor
9
Outer rotor
10
Oil in
11
Relief valve component
12
Rear
13
Oil out

Oil pump specification

Item

Engine speed [rpm]

Specification
Oil discharge pressure (approx. quantity)
(kPa {kgf/cm2, psi})
1,500
129—269 {1.32—2.74, 18.7—39.0}
3,000
234—521 {2.39—5.31, 33.9—75.5}
Relief valve opening pressure (approx. quantity) (kPa {kgf/cm2, psi})
500—600 {5.09—6.11, 72.6—87.0}

•  A silent chain (link connecting type) has been adopted to the oil pump chain to reduce chain operation noisewhen the chain and the sprocket engage.
•  The engine oil in the engine front cover lubricates the oil pump chain. The wear resistance has been improvedby the pins constructing the oil pump chain.
•  The oil pump sprocket is sintere hardened metals to improve durability.
am3zzn00000794

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

Oil pump driven chain, oil pump sprocket specification

Item

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