Mazda X-5. Manual — part 18

LUBRICATION

01–11–3

01–11

OIL PAN CONSTRUCTION [LF]

E5U011110040N01

• An aluminum alloy oil pan has been adopted for

noise reduction.

• An oil pan baffle plate has been adopted inside

the oil pan to stabilize engine oil diffusion by
crankshaft rotation and oil level when the vehicle
rolls.

• A silicon sealant with excellent sealing qualities

has been adopted.

End Of Sie

OIL STRAINER CONSTRUCTION [LF]

E5U011114240N01

• A plastic oil strainer with a resin filter in the middle of the strainer has been adopted for weight reduction.

End Of Sie

OIL PAN BAFFLE PLATE

EXTERNAL VIEW

E5U111ZS5004

A

A

OIL PUMP ATTACHMENT
SIDE

EXTERNAL VIEW

OIL STRAINER

OIL SUPPLY INLET

OIL STRAINER

RESIN FILTER

RESIN FILTER

A-A SECTIONAL VIEW

E5U111ZS5005

LUBRICATION

01–11–4

OIL PUMP CONSTRUCTION [LF]

E5U011114100N01

• 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

• 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.

Item

Engine speed [rpm]

Specification [kPa {kgf/cm

2

, psi}]

Oil discharge pressure (reference value)
[Oil temperature: 100

°C {212 °F}]

1,500

180— 387 {1.84—3.95, 26.2—56.1}

3,000

337—591 {3.44—6.03, 49.0—85.8}

Relief valve opening pressure (reference value)

420—520 {4.28—5.30, 60.9—75.4}

OIL PUMP BODY
(RELIEF VALVE
INSIDE)

OIL PUMP CHAIN GUIDE

OIL PUMP CHAIN

OIL PUMP SPROCKET

FRONT

INNER ROTOR

OUTER ROTOR

OIL IN

RELIEF VALVE COMPONENT

BACK

OIL OUT

OIL PUMP CHAIN
TENSIONER

EPU111ZS3008

TIMING CHAIN

OIL PUMP SPROCKET

OIL PUMP DRIVEN CHAIN

PITCH SIZE

PIN

LINK

OUTER
DIAMETER

OIL PUMP SPROCKET

DRIVEN
TOOTH WIDTH

EPU111ZS3005

LUBRICATION

01–11–5

01–11

Oil pump driven chain, oil pump sprocket specification

End Of Sie

OIL JET VALVE CONSTRUCTION/OPERATION [LF]

E5U011110730N01

Construction

• The oil jet valves are installed in the cylinder block (in the main journal). The oil jet valve nozzles are installed

pointed toward the back surface of each piston.

• The oil jet valves are designed to maintain optimum oil pressure in the engine by controlling the oil injection

according to the oil pressure applied to the check ball in the oil jet valves.

Operation

• Oil pressure applied to the check-ball in the oil jet

valve opens and closes the oil passage-way to
the nozzle and controls oil injection starting and
stopping.

• Oil pressure greater than the specified value

applied to the check-ball in the oil jet valve opens
the oil passage to the spring-pressed nozzle,
starting injection. Conversely, oil pressure less
than the specified value applied to the check-ball
blocks the oil passage by spring force, stopping
injection.

End Of Sie

Item

Specification [mm {in}]

Oil pump driven chain Pitch size

8 {0.3}

Oil pump sprocket

Outer diameter

60.78 {2.392}

Driven tooth width

6.15 {0.242}

ENGINE
FRONT
SIDE

CYLINDER LINER

OIL JET VALVE

CYLINDER BLOCK

PISTON

OIL

OIL JET VALVE

EPU111ZS3006

NOZZLE

CHECK BALL

OIL PASSAGE

OIL

SPRING

OIL JET
VALVE
BODY

EPU111ZS3007