Mazda X-5. Manual — part 17

MECHANICAL

01–10–19

01–10

Retarding valve timing

• When the spool valve in the oil control valve (OCV) moves to the right according to the PCM signal, hydraulic

pressure, from the oil pump, feeds into the valve timing retard passage and finally to the valve timing retard
chamber in the variable valve timing actuator. Then, the rotor integrated with the camshaft rotates in the valve
timing retard direction, against the housing driven by the crankshaft, and valve timing is retarded.

Maintaining intermediate valve timing

• The spool valve in the oil control valve (OCV) is located near the middle of the valve timing advance and retard

positions. Because of this, hydraulic pressures are maintained in both valve timing advance and retard
chambers of the variable valve timing actuator. At the same time, relative angles of the rotor and the housing
are fixed and maintained, resulting in fixed valve timing.

End Of Sie

ROTOR

TO VALVE TIMING
RETARD CHAMBER

HOUSING

OIL PAN

VALVE TIMING
RETARD CHAMBER

VARIABLE VALVE TIMING ACTUATOR

CAMSHAFT

SPOOL VALVE

OIL PUMP

OIL CONTROL VALVE (OCV)

PCM

FROM VALVE TIMING
ADVANCE CHAMBER

HYDRAULIC PRESSURE FLOW

E5U110ZT5033

OIL PUMP

PCM

TO VALVE TIMING
ADVANCE CHAMBER

TO VALVE TIMING
RETARD CHAMBER

OIL CONTROL VALVE (OCV)

HYDRAULIC PRESSURE FLOW

E5U110ZT5034

MECHANICAL

01–10–20

VARIABLE VALVE TIMING ACTUATOR CONSTRUCTION [LF]

E5U011012490N01

• The variable valve timing actuator consists of the following: a housing case integrated to the camshaft

sprocket, a cover, a camshaft integrated rotor, and a stopper pin that retains the rotor and case when the
engine stops. Also, the rotor has a chip seal that seals the valve timing advance chamber and the valve timing
retard chamber.

• The cover and rotor of the variable valve timing actuator are notched, and are used as alignment marks when

inspecting the variable valve timing actuator.

End Of Sie

OIL CONTROL VALVE (OCV) CONSTRUCTION [LF]

E5U011014420N01

• The oil control valve (OCV) consists of a spool valve that switches the passages for engine oil, a coil that

moves the spool valve, a plunger, and a return spring.

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CAMSHAFT SPROCKET

ROTOR

COVER

STOPPER PIN

TIP SEAL

CASE

NOTCH

E5U110ZT5035

SPOOL VALVE

COIL

PLUNGER

RETURN SPRING

E5U110ZT5036

LUBRICATION

01–11–1

01–11

01–11

LUBRICATION

LUBRICATION SYSTEM OUTLINE

[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–11–1

Features . . . . . . . . . . . . . . . . . . . . . . . . 01–11–1

LUBRICATION SYSTEM

STRUCTURAL VIEW [LF]. . . . . . . . . . . 01–11–1

LUBRICATION SYSTEM

FLOW DIAGRAM [LF] . . . . . . . . . . . . . . 01–11–2

OIL FILTER CONSTRUCTION [LF] . . . . 01–11–2
OIL PAN CONSTRUCTION [LF] . . . . . . . 01–11–3

OIL STRAINER CONSTRUCTION

[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–11–3

OIL PUMP CONSTRUCTION [LF] . . . . . . 01–11–4
OIL JET VALVE

CONSTRUCTION/OPERATION
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–11–5

Construction . . . . . . . . . . . . . . . . . . . . . 01–11–5
Operation . . . . . . . . . . . . . . . . . . . . . . . 01–11–5

End of Toc

LUBRICATION SYSTEM OUTLINE [LF]

E5U011100000N01

Features

End Of Sie

LUBRICATION SYSTEM STRUCTURAL VIEW [LF]

E5U011100000N02

End Of Sie

Reduced noise

• Aluminum alloy oil pan adopted

Reduced weight

• Plastic oil strainer adopted

Improved lubricity

• Trochoid gear type oil pump adopted

• Oil jet valves adopted

OIL PRESSURE
SWITCH

OIL JET VALVE

GASKET

OIL FILTER
ADAPTER

OIL PUMP CHAIN
TENSIONER

OIL PUMP CHAIN
GUIDE

OIL FILTER

O-RING

OIL STRAINER

OIL PUMP

OIL PAN

WASHER

OIL PAN DRAIN PLUG

OIL PUMP SPROCKET

OIL PUMP
CHAIN

E5U111ZS5001

LUBRICATION

01–11–2

LUBRICATION SYSTEM FLOW DIAGRAM [LF]

E5U011100000N03

End Of Sie

OIL FILTER CONSTRUCTION [LF]

E5U011114300N01

• The oil filter component is installed on the left surface (vehicle left) of the cylinder block.

• An aluminum oil filter adapter has been adopted for weight reduction. The oil pressure switch is installed on the

rear of the oil filter adapter.

• The oil filter is a full-flow paper element type with an outer diameter of 76.2 mm {3.00 in} and height of 94.0 mm

{3.70 in}.

End Of Sie

CAMSHAFT

TAPPET

ORIFICE

OIL PRESSURE SWITCH

OIL FILTER

OIL PUMP

OIL STRAINER

MAIN BEARING

CRANKSHAFT

OIL PAN

TIMING CHAIN

CHAIN TENSIONER

CONNECTING ROD
BEARING

PISTON

OIL JET VALVE

OIL PASSAGE

OIL RELIEF PASSAGE

OCV

VARIABLE VALVE
TIMING ACTUATOR

TO OIL PAN

OIL BYPASS PASSAGE

E5U111ZS5002

GASKET

OIL FILTER ADAPTER

OIL PRESSURE
SWITCH

OIL FILTER

EXTERNAL VIEW

HEIGHT

OUTER
DIAMETER

E5U111ZS5003