COOLING 2.5L TURBO DIESEL
TABLE OF CONTENTS
page page
COOLING 2.5L TURBO DIESEL
DESCRIPTION - COOLING SYSTEM.........1
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - COOLING
SYSTEM.............................1
DIAGNOSIS AND TESTING - COOLING
SYSTEM LEAK TEST....................6
DIAGNOSIS AND TESTING - COOLING
SYSTEM FLOW CHECK.................7
DIAGNOSIS AND TESTING - COOLING
SYSTEM AERATION....................7CLEANING.............................7
INSPECTION...........................7
SPECIFICATIONS
SPECIFICATIONS - TORQUE.............8
SPECIFICATIONS - COOLING SYSTEM
CAPACITY............................8
ACCESSORY DRIVE.......................9
ENGINE...............................14
COOLING 2.5L TURBO DIESEL
DESCRIPTION - COOLING SYSTEM
The cooling system regulates engine operating tem-
perature. It allows the engine to reach normal oper-
ating temperature as quickly as possible, maintains
normal operating temperature and prevents over-
heating.
The cooling system also provides a means of heat-
ing the passenger compartment. The cooling system
is pressurized and uses a centrifugal water pump to
circulate coolant throughout the system. A separate
and remotely mounted, pressurized coolant tank
using a pressure/vent cap is used.
COOLING SYSTEM COMPONENTS
The cooling system consists of:
²Charge Air Cooler
²Electric Cooling Fans
²A aluminum-core radiator with plastic side
tanks
²A separate pressurized coolant tank
²A pressure/vent cap on the coolant tank
²Fan shroud
²Thermostat
²Coolant
²Low coolant warning lamp
²Coolant temperature gauge
²Water pump
²Hoses and hose clamps
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - COOLING SYSTEM
Establish what driving conditions caused the com-
plaint. Abnormal loads on the cooling system such as
the following may be the cause:
(1) PROLONGED IDLE, VERY HIGH AMBIENT
TEMPERATURE, SLIGHT TAIL WIND AT IDLE,
SLOW TRAFFIC, TRAFFIC JAMS, HIGH SPEED
OR STEEP GRADES.
Driving techniques that avoid overheating are:
²Idle with A/C off when temperature gauge is at
end of normal range.
²Increasing engine speed for more air flow is rec-
ommended.
(2) TRAILER TOWING:
Consult Trailer Towing section of owners manual.
Do not exceed limits.
(3) RECENT SERVICE OR ACCIDENT REPAIR:
Determine if any recent service has been per-
formed on vehicle that may effect cooling system.
This may be:
²Engine adjustments (incorrect timing)
²Slipping engine accessory drive belt
²Brakes (possibly dragging)
²Changed parts (incorrect water pump)
²Reconditioned radiator or cooling system refill-
ing (possibly under filled or air trapped in system).
NOTE: If investigation reveals none of the previous
items as a cause for an engine overheating com-
plaint, refer to following Cooling System Diagnosis
charts.
These charts are to be used as a quick-reference
only.
RGCOOLING 2.5L TURBO DIESEL7a-1
ProCarManuals.com
