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TJ
COOLING
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . . . 2
ON-BOARD DIAGNOSTICS (OBD) . . . . . . . . . . . 2
PRELIMINARY CHECKS. . . . . . . . . . . . . . . . . . . 2
COOLING
DESCRIPTION
This Service Manual Supplement includes
ONLY the information that is new or updated
for 2001 Model Year. All other Service Manual
information is in the 2000 Model Year Service
Manual.
When you are using this information you may
be referred to another section of the Service
Manual. The "Refer to'' is written differently
than in prior years.
DESCRIPTION - 4.0L ENGINE
The cooling system (Fig. 1) is designed to maintain
engine temperature at an efficient level during all
engine operating conditions.
The components of the cooling system are:
• A heavy duty radiator
• Cooling fan (mechanical)
• Thermal viscous fan drive
• Fan shroud
• Radiator pressure cap
• Thermostat
• Coolant reserve/overflow system
• Automatic transmission oil cooler (internal to
radiator)
• Coolant
• Water pump
• Coolant hoses and clamps
2001 JEEP WRANGLER
COOLING
TABLE OF CONTENTS
page
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . . . 8
COOLING SYSTEM - REVERSE FLUSHING. . . . 8
ACCESSORY DRIVE
ENGINE
TRANSMISSION
1 - FROM THERMOSTAT
2 - TO WATER PUMP
3 - RADIATOR
. . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . 14
Fig. 1 Coolant Circulation - 4.0L Engine
COOLING
7s - 1
page
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