SsangYong Stavic / SsangYong Rodius (2005 year). Manual - part 34

1B-120

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ENGINE MECHANICAL

M162 GSL ENG SM - 2005.7

Name and Part Number

A9917 0012B (DW110-120)

Holding Pin

1D-1

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ENGINE MECHANICAL

M162 GSL ENG SM - 2005.7

ENGINE COOLING

 00

SECTION 1D

DESCRIPTION AND OPERATION ......... 1D-2

General description .......................... 1D-2

Radiator ............................................ 1D-2

Coolant reservoir .............................. 1D-2

Thermostat ........................................ 1D-2

Water pump ....................................... 1D-3

Electric cooling fan ........................... 1D-3

A/C Off or Non-AC model ................. 1D-3

A/C On .............................................. 1D-3

Engine coolant temperature sensor . 1D-3

Coolant temperature gauge ............. 1D-3

COMPONENT LOCATOR ...................... 1D-4

Gasoline engine ................................ 1D-4

DIAGNOSTIC INFORMATION AND
PROCEDURE ........................................ 1D-5

Cooling system diagnosis ................. 1D-5

Thermostat test ................................. 1D-7

System leakage test ......................... 1D-7

REPAIR INSTRUCTIONS ....................... 1D-8

ON-VEHICLE SERVICE ......................... 1D-8

Coolant drain and fill up ................... 1D-8

Coolant connection fitting ............... 1D-10

Water pump ..................................... 1D-12

Oil cooler pipe line .......................... 1D-14

Thermostat ...................................... 1D-15

Cooling fan and viscous clutch ....... 1D-16

Cooling fan shroud ......................... 1D-18

Radiator .......................................... 1D-20

General specifications .................... 1D-22

SPECIFICATION .................................. 1D-23

Fastener tightening specifications . 1D-23

SPECIAL TOOLS AND EQUIPMENT .. 1D-24

Table of Contents

1D-2

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ENGINE MECHANICAL

M162 GSL ENG SM - 2005.7

GENERAL DESCRIPTION

The cooling system maintains the engine temperature at
an efficient level during all engine operating conditions.
When the engine is cold, the cooling system cools the
engine slowly or not at all. This slow cooling of the engine
allows the engine to warm up quickly.

The cooling system includes a radiator and recovery
subsystem, cooling fans, a thermostat and housing, a
water pump, and a water pump drive belt. The timing belt
drives the water pump.

All components must function properly for the cooling
system to operation. The water pump draws the coolant
from the radiator. The coolant then circulates through water
jackets in the engine block, the intake manifold, and the
cylinder head. When the coolant reaches the operating
temperature of the thermostat, the thermostat opens. The
coolant then goes back to the radiator where it cools.

This system directs some coolant through the hoses to
the heat core. This provides for heating and defrosting.
The coolant reservoir is connected to the radiator to re-
cover the coolant displaced by expansion from the high
temperatures. The coolant reservoir maintains the cor-
rect coolant level.

The cooling system for this vehicle has no radiator cap or
filler neck. The coolant is added to the cooling system
through the coolant reservoir.

RADIATOR

This vehicle has a lightweight tube-and-fin aluminum
radiator. Plastic tanks are mounted on the upper and the
lower sides of the radiator core.

On vehicles equipped with automatic transaxles, the
transaxle fluid cooler lines run through the radiator tank.
A radiator drain plug is on this radiator.

To drain the cooling system, open the drain plug.

COOLANT RESERVOIR

The coolant reservoir is a transparent plastic reservoir,
similar to the windshield washer reservoir.

The coolant reservoir is connected to the radiator by a
hose and to the engine cooling system by another hose.
As the vehicle is driven, the engine coolant heats and
expands. The portion of the engine coolant displaced by
this expansion flows from the radiator and the engine into

the coolant reservoir. The air trapped in the radiator and
the engine is degassed into the coolant reservoir.

When the engine stops, the engine coolant cools and
contracts. The displaced engine coolant is then drawn
back into the radiator and the engine. This keeps the
radiator filled with the coolant to the desired level at all
times and increases the cooling efficiency.

Maintain the coolant level between the MIN and MAX
marks on the coolant reservoir when the system is cold.

THERMOSTAT

A wax pellet-type thermostat controls the flow of the en-
gine coolant through the engine cooling system. The ther-
mostat is mounted in the thermostat housing to the front
of the cylinder head.

The thermostat stops the flow of the engine coolant from
the engine to the radiator to provide faster warm-up, and
to regulate the coolant temperature. The thermostat re-
mains closed while the engine coolant is cold, preventing
circulation of the engine coolant through the radiator. At
this point, the engine coolant is allowed to circulate only
throughout the heater core to warm it quickly and evenly.

As the engine warms, the thermostat opens. This allows
the engine coolant to flow through the radiator where the
heat is dissipated. This opening and closing of the ther-
mostat permits enough engine coolant to enter the radia-
tor to keep the engine within proper engine temperature
operating limits.

The wax pellet in the thermostat is hermetically sealed in
a metal case. The wax element of the thermostat ex-
pands when it is heated and contracts when it is cooled.

As the vehicle is driven and the engine warms, the engine
coolant temperature increases. When the engine coolant
reaches a specified temperature, the wax pellet element
in the thermostat expands and exerts pressure against
the metal case, forcing the valve open. This allows the
engine coolant to flow through the engine cooling system
and cool the engine.

As the wax pellet cools, the contraction allows a spring
to close the valve.

The thermostat begins to open at 82°C (180°F) and is
fully open at 95°C (203°F). The thermostat closes at 80°C
(176°F).

DESCRIPTION AND OPERATION

1D-3

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ENGINE MECHANICAL

M162 GSL ENG SM - 2005.7

WATER PUMP

The belt-driven centrifugal water pump consists of an
impeller, a drive shaft, and a belt pulley.

The impeller is supported by a completely sealed bearing.

The water pump is serviced as an assembly and, there-
fore, cannot be disassembled.

ELECTRIC COOLING FAN

Caution

 Keep hands, tools, and clothing away from the engine
cooling fans to help prevent personal injury. This fan
is electric and can turn on even when the engine is
not running.

Caution

f a fan blade is bent or damaged in any way, no attempt
should be made to repair or reuse the damaged part.
A bent or damaged fan assembly should always be
replaced with a new one to prevent possible injury.

The cooling fans are mounted behind the radiator in the
engine compartment. The electric cooling fans increase
the flow of air across the radiator fins and across the
condenser on air conditioned (A/C)-equipped vehicles.

This helps to speed cooling when the vehicle is at idle or
moving at low speeds.

All models have two fans. The main fan is 320 mm (12.6
inches) in diameter with seven blades to aid the airflow
through the radiator and the condenser. An electric motor
attached to the radiator support drives the fan. The auxil-
iary fan is 320 mm (12.6 inches) in diameter.

A/C OFF OR NON-AC MODEL

• The cooling fans are actuated by the engine control

module (ECM) using a low-speed cooling fan relay, a
high-speed cooling fan relay and a cooling fan motor
relay.

• The ECM will turn the cooling fans on at low speed

when the coolant temperature reaches 95°C (203°F)
and at high speed when the coolant temperature
reaches 105°C (221°F).

• The ECM will change the cooling fans from high peed

to low speed at 100°C (212°F) and will turn the cooling
fans off at 90°C (194°F).

A/C ON

• The ECM will turn the cooling fans on at low speed

when the A/C system is on. The ECM will change to
high speed when the high side A/C pressure reaches
1860 kPa (269.8 psi).

• The cooling fans will return to low speed when the

high side A/C pressure reaches 1378 kPa (199.8 psi).

ENGINE COOLANT TEMPERA-
TURE SENSOR

The Engine Coolant Temperature (ECT) sensor uses a
temperature to control the signal voltage to the Engine
Control Module (ECM).

COOLANT TEMPERATURE
GAUGE

The coolant temperature gauge controls the instrument
panel temperature indicator. The coolant temperature
gauge is located with ECT sensor.