2004 DODGE RAM 2500 DIESEL coolant temperature

WARNING!
Never add coolant when the engine is overheated.
Do not loosen or remove the pressure cap to cool an
overheated engine. Heat causes pressure build up in
the cooling system. To prevent scalding or injury, do
not remove the pressure cap while the system is hot
or under pressure.
CAUTION!
Recheck the cooling system to insure total system is
full of coolant.
Fan
Inspection
Check the fan for cracks and bent or broken blades. If any
of these conditions exist, you must replace the fan. Make
sure it is securely mounted.
NOTE:This service procedure must be performed by a
trained service technician. Make arrangements with your
authorized Dodge Truck Dealer for this inspection.
Charge Air Cooler (Inter-Cooler)
The charge air cooler is positioned between the radiator
and the air conditioner condenser. Air enters the engine
through the air cleaner and passes through the turbo-
charger where it is pressurized. This pressurized air
rapidly reaches high temperature. The air is then directed
through a hose to the charge air cooler and through
another hose to the intake manifold of the engine. The air
entering the engine has been cooled by about 50 to 100
MAINTAINING YOUR VEHICLE 347
7

EMISSION CONTROL SYSTEM MAINTENANCE
The ªScheduledº maintenance services, listed inbold
typein this section (Section 8) must be done at the times
or mileages specified to assure the continued proper
functioning of the emission control system. These, and all
other maintenance services included in this manual,
should be done to provide best vehicle performance and
reliability. More frequent maintenance may be needed for
vehicles in severe operating conditions such as dusty
areas and very short trip driving.
Inspection and service also should be done any time a
malfunction is suspected.
NOTE:Maintenance, replacement, or repair of the emis-
sion control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part which has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULES Ð 24±VALVE
CUMMINS TURBO DIESEL
There are two maintenance schedules that show the
requiredservice for your vehicle.
First is ScheduleªBº. It is for vehicles that are operated
under the conditions that are listed below and at the
beginning of the schedule.
²Frequent short trips where the engine does not achieve
full operating temperature (operating temperature de-
fined as 190É F (66É C ) coolant temperature).
²Extensive engine idling (over 10 minutes per hour of
operation) at ambient temperatures less than 32É F (0É
C).
²Driving in dusty conditions.
²Frequent trailer towing.
²Taxi, police, or delivery service (commercial service).
384 MAINTENANCE SCHEDULES
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Schedule ªBº
Follow schedule ªBº if you usually operate your vehicle
under one or more of the following conditions.
²Frequent short trips where the engine does not achieve
full operating temperature (operating temperature de-
fined as 190É F (66É C ) coolant temperature).
²Extensive engine idling (over 10 minutes per hour of
operation) at ambient temperatures less than 32É F (0É
C).
²Driving in dusty conditions.
²Frequent trailer towing.
²Taxi, police, or delivery service (commercial service).
²Off-road or desert operation.
²Extensive operation at high engine speeds (greater
than 2900 rpm) and loads (greater than 70% throttle).
SCHEDULE ªBº 387
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Child Seat............................56,62
Cigar Lighter........................... 127
Climate Control......................... 185
Clock................................ 151
Clutch Linkage Maintenance................ 350
Compact Disc Maintenance................. 184
Compact Disc Player..................158,164
Compact Spare Tire...................... 255
Compass.............................. 117
Compass Calibration..................... 117
Compass Variance....................... 118
Computer, Trip/Travel.................... 113
Console, Overhead....................... 112
Contract, Service........................ 404
Cooling System......................... 343
Coolant Capacity...................... 379
Coolant Level......................... 344
Disposal of Used Coolant................ 346
Drain, Flush, and Refill.................. 344Inspection........................... 343
Radiator Cap......................343,346
Selection of Coolant..................345,380
Temperature Gauge..................... 146
Cruise Control.......................... 109
Cup Holder............................ 128
Customer Assistance..................... 402
Daytime Running Lights................... 102
Dealer Service.......................... 322
Defroster, Rear Window..............78,191,195
Defroster, Windshield..................186,189
Delay Wipers........................... 105
Differential, Limited-Slip.................. 237
Dipsticks.............................. 325
Power Steering........................ 339
Disc Brakes............................ 348
Disposal.............................. 331
Engine Oil........................... 331
414 INDEX

Used Coolant......................... 346
Door Ajar............................. 145
Door Locks............................. 16
Door Opener, Garage..................... 120
Draining Fuel/Water Separator Filter.......... 334
Drive Belts............................ 331
Dual Rear Wheels.....................263,306
Electric Rear Window Defrost..........78,191,195
Electrical Power Outlets................... 126
Electronic Speed Control................... 109
Emergency Brake........................ 238
Emergency, In Case of
Freeing Vehicle When Stuck............... 313
Hazard Warning Flasher................. 296
Jacking............................. 300
Jump Starting......................... 310
Tow Hooks.......................... 314
Towing............................. 315Emission Control System Maintenance......... 384
Engine............................... 320
Air Cleaner.......................... 331
Block Heater.......................205,212
Break-In Recommendations................ 67
Compartment......................... 320
Coolant..........................345,380
Cooling............................. 343
Data Plate........................... 294
Identification......................... 320
Idling.............................. 214
Jump Starting......................... 310
Oil ..............................325,380
Oil Synthetic......................... 214
Runaway............................ 264
Temperature Gauge..................... 146
Ethylene Glycol Antifreeze................. 345
Exhaust Gas Caution................69,136,342
Exhaust System....................69,342,358
INDEX 415
10

Exterior Lighting........................ 101
Fan .................................. 347
Filters
Engine Oil.....................325,328,380
Flashers
Turn Signal.......................... 103
Flat Tire Stowage.....................299,309
Fluid, Brake........................... 381
Fluid Capacities......................... 379
Fluid Level Checks
Brake............................... 348
Manual Transmission................... 352
Power Steering........................ 339
Transfer Case......................... 352
Fog Lights..........................102,378
Fold Flat Load Floor..................... 130
Four Wheel Drive....................... 226
Four-Way Hazard Flasher.................. 296Freeing A Stuck Vehicle................... 313
Front Axle..........................340,351
Fuel..............................264,297
Diesel.........................264,297,380
Gauge.............................. 149
Requirements......................... 264
Specifications......................... 267
Tank Capacity........................ 379
Fuses................................ 366
Garage Door Opener..................... 120
Gauges............................... 150
Coolant Temperature.................... 146
Fuel................................ 149
Oil Pressure.......................... 145
Speedometer......................... 145
Tachometer.......................... 144
Voltmeter............................ 144
Gear Ranges........................... 218
416 INDEX