COOLING SYSTEM
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
COOLING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 1
AUTOMATIC TRANSMISSION OIL COOLER. . . . . 2
COOLANT RESERVE/OVERFLOW SYSTEM . . . . . 2
COOLING SYSTEM FANS . . . . . . . . . . . . . . . . . . . 3
BLOCK HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . 4
THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
RADIATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RADIATOR PRESSURE CAP . . . . . . . . . . . . . . . . . 5
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
HOSE CLAMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
VISCOUS FAN DRIVE . . . . . . . . . . . . . . . . . . . . . . 7
ELECTRIC COOLING FAN . . . . . . . . . . . . . . . . . . . 8
DIAGNOSIS AND TESTING
ON-BOARD DIAGNOSTICS (OBD) . . . . . . . . . . . . 9
DRB SCAN TOOL . . . . . . . . . . . . . . . . . . . . . . . . . 9
ACCESSORY DRIVE BELT DIAGNOSIS. . . . . . . . . 9
PRELIMINARY CHECKS . . . . . . . . . . . . . . . . . . . 11
RADIATOR COOLANT FLOW CHECK . . . . . . . . . 17
COOLING SYSTEM—TESTING FOR LEAKS . . . . 17
VISCOUS FAN DRIVE . . . . . . . . . . . . . . . . . . . . . 19
ELECTRIC COOLING FAN . . . . . . . . . . . . . . . . . . 19
RADIATOR CAP-TO-FILLER NECK
SEAL—PRESSURE RELIEF CHECK . . . . . . . . . 20
RADIATOR CAP—PRESSURE TESTING. . . . . . . 20
COOLANT—LOW LEVEL AERATION . . . . . . . . . 21
DEAERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SERVICE PROCEDURES
COOLANT—ROUTINE LEVEL CHECK. . . . . . . . . 21
COOLANT—ADDING ADDITIONAL. . . . . . . . . . . 21
COOLANT—LEVEL CHECK . . . . . . . . . . . . . . . . . 21
COOLING SYSTEM—DRAINING AND
FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
COOLING SYSTEM—REVERSE FLUSHING . . . . 22
REMOVAL AND INSTALLATION
TRANSMISSION OIL COOLERS . . . . . . . . . . . . . 23
COOLANT RESERVE TANK . . . . . . . . . . . . . . . . . 23
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . 24
THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
RADIATOR—2.5L . . . . . . . . . . . . . . . . . . . . . . . . 29
RADIATOR—4.0L . . . . . . . . . . . . . . . . . . . . . . . . 31
ELECTRIC COOLING FAN—2.5L . . . . . . . . . . . . 33
ELECTRIC COOLING FAN—4.0L . . . . . . . . . . . . 34
BLOCK HEATER . . . . . . . . . . . . . . . . . . . . . . . . . 35
ENGINE ACCESSORY DRIVE BELTS. . . . . . . . . . 35
COOLING SYSTEM FANS . . . . . . . . . . . . . . . . . . 38
VISCOUS FAN DRIVE REMOVAL/
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . 39
CLEANING AND INSPECTION
RADIATOR PRESSURE CAP . . . . . . . . . . . . . . . . 39
RADIATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
WATER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . 39
FAN BLADE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
COOLING SYSTEM HOSES. . . . . . . . . . . . . . . . . 40
SPECIFICATIONS
SPECIAL TOOLS
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
DESCRIPTION AND OPERATION
COOLING SYSTEM
DESCRIPTION
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 and cooling the auto-
matic transmission fluid (if equipped). The cooling
system is pressurized and uses a centrifugal water
pump to circulate coolant throughout the system.
An optional factory installed heavy duty cooling
package is available on most models. The package
consists of a radiator that has an increased number
of cooling fins. Vehicles equipped with a 2.5L/4.0L
engine and heavy duty cooling and/or air condition-
ing also have an auxiliary electric cooling fan.
The cooling system consists of:
•
A radiator
•
Cooling fan (mechanical and/or electrical)
•
Thermal viscous fan drive
XJ
COOLING SYSTEM
7 - 1
Summary of Contents for Cherokee 2000
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Page 96: ...Fig 105 Gear Tooth Contact Patterns 3 60 TUBE 181 AND 186 FBI AXLE XJ ADJUSTMENTS Continued...
Page 100: ...Installer D 144 Installer W 262 3 64 TUBE 181 AND 186 FBI AXLE XJ SPECIAL TOOLS Continued...
Page 134: ...Fig 79 Gear Tooth Contact Patterns 3 98 194 RBI AXLE XJ ADJUSTMENTS Continued...
Page 166: ...Fig 59 Gear Tooth Contact Patterns 3 130 8 1 4 REAR AXLE XJ ADJUSTMENTS Continued...
Page 215: ...Fig 8 Clutch Components And Inspection XJ CLUTCH 6 5 DIAGNOSIS AND TESTING Continued...
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Page 647: ...Fig 16 2 5L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 23 DESCRIPTION AND OPERATION Continued...
Page 648: ...Fig 17 4 0L Engine 8W 90 24 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
Page 649: ...Fig 18 4 0L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 25 DESCRIPTION AND OPERATION Continued...
Page 662: ...Fig 31 Liftgate 8W 90 38 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
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Page 826: ...Fig 6 Frame Dimensions 13 8 FRAME AND BUMPERS XJ SPECIFICATIONS Continued...
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Page 1353: ...Fig 3 Hood Components XJ BODY 23 25 REMOVAL AND INSTALLATION Continued...
Page 1396: ...WELD LOCATIONS UPPER COWL 23 68 BODY XJ SPECIFICATIONS Continued...
Page 1397: ...UPPER COWL XJ BODY 23 69 SPECIFICATIONS Continued...
Page 1398: ...COWL 23 70 BODY XJ SPECIFICATIONS Continued...
Page 1399: ...A PILLAR XJ BODY 23 71 SPECIFICATIONS Continued...
Page 1400: ...A PILLAR 23 72 BODY XJ SPECIFICATIONS Continued...
Page 1401: ...A PILLAR XJ BODY 23 73 SPECIFICATIONS Continued...
Page 1402: ...A PILLAR 23 74 BODY XJ SPECIFICATIONS Continued...
Page 1403: ...B PILLAR XJ BODY 23 75 SPECIFICATIONS Continued...
Page 1404: ...D PILLAR 23 76 BODY XJ SPECIFICATIONS Continued...
Page 1405: ...FUEL FILLER OPENING XJ BODY 23 77 SPECIFICATIONS Continued...
Page 1406: ...CARGO AREA FLOOR PAN 23 78 BODY XJ SPECIFICATIONS Continued...
Page 1407: ...ROOF AND D PILLAR XJ BODY 23 79 SPECIFICATIONS Continued...
Page 1408: ...LIFTGATE OPENING 23 80 BODY XJ SPECIFICATIONS Continued...
Page 1409: ...ROOF XJ BODY 23 81 SPECIFICATIONS Continued...
Page 1410: ...ROOF 23 82 BODY XJ SPECIFICATIONS Continued...
Page 1411: ...FRAME RAIL XJ BODY 23 83 SPECIFICATIONS Continued...
Page 1412: ...FRAME RAIL 23 84 BODY XJ SPECIFICATIONS Continued...
Page 1413: ...FRAME RAIL XJ BODY 23 85 SPECIFICATIONS Continued...
Page 1414: ...FRAME RAIL 23 86 BODY XJ SPECIFICATIONS Continued...
Page 1415: ...REINFORCEMENT XJ BODY 23 87 SPECIFICATIONS Continued...
Page 1416: ...FRONT INNER FENDER 23 88 BODY XJ SPECIFICATIONS Continued...
Page 1417: ...FRONT INNER FENDER AND RADIATOR CLOSURE PANEL XJ BODY 23 89 SPECIFICATIONS Continued...
Page 1418: ...REINFORCEMENT 23 90 BODY XJ SPECIFICATIONS Continued...
Page 1419: ...FRONT FENDER XJ BODY 23 91 SPECIFICATIONS Continued...
Page 1420: ...BODY SIDE 23 92 BODY XJ SPECIFICATIONS Continued...
Page 1421: ...REAR WHEELHOUSE XJ BODY 23 93 SPECIFICATIONS Continued...
Page 1422: ...REAR INNER WHEELHOUSE 23 94 BODY XJ SPECIFICATIONS Continued...
Page 1423: ...BODY SIDE XJ BODY 23 95 SPECIFICATIONS Continued...
Page 1424: ...BODY SIDE 23 96 BODY XJ SPECIFICATIONS Continued...
Page 1425: ...BODY SIDE XJ BODY 23 97 SPECIFICATIONS Continued...
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Page 1427: ...BODY SIDE XJ BODY 23 99 SPECIFICATIONS Continued...
Page 1428: ...BODY SIDE 23 100 BODY XJ SPECIFICATIONS Continued...
Page 1429: ...UNDERBODY XJ BODY 23 101 SPECIFICATIONS Continued...
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Page 1439: ...UNDERBODY XJ BODY 23 111 SPECIFICATIONS Continued...
Page 1440: ...BODY SEALING LOCATIONS APPLICATION METHODS 23 112 BODY XJ SPECIFICATIONS Continued...
Page 1441: ...COWL AND DASH PANEL XJ BODY 23 113 SPECIFICATIONS Continued...
Page 1442: ...DASH PANEL AND FLOOR PAN 23 114 BODY XJ SPECIFICATIONS Continued...
Page 1443: ...FLOOR PAN XJ BODY 23 115 SPECIFICATIONS Continued...
Page 1444: ...REAR INNER WHEELHOUSE 23 116 BODY XJ SPECIFICATIONS Continued...
Page 1445: ...FRONT INNER WHEELHOUSE XJ BODY 23 117 SPECIFICATIONS Continued...
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Page 1447: ...BODY SIDE XJ BODY 23 119 SPECIFICATIONS Continued...
Page 1448: ...BODY SIDE 23 120 BODY XJ SPECIFICATIONS Continued...
Page 1449: ...ROOF PANEL XJ BODY 23 121 SPECIFICATIONS Continued...
Page 1450: ...FUEL FILLER HOUSING 23 122 BODY XJ SPECIFICATIONS Continued...
Page 1451: ...LIFTGATE OPENING XJ BODY 23 123 SPECIFICATIONS Continued...
Page 1452: ...STRUCTURAL ADHESIVE LOCATIONS LEFT QUARTER PANEL 23 124 BODY XJ SPECIFICATIONS Continued...
Page 1453: ...REAR WHEELHOUSE XJ BODY 23 125 SPECIFICATIONS Continued...
Page 1454: ...ROOF BOWS 23 126 BODY XJ SPECIFICATIONS Continued...
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