coolant temperature Ram 2500 (Diesel) 2007 Owner's Guide

•Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean, also.
•Do not change the thermostat for summer or winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory coolant performance, poor gas
mileage, and increased emissions.
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
degrees Fahrenheit. This cooling process enables more
efficient burning of fuel resulting in fewer emissions.
To guarantee optimum performance of the system, keep
the surfaces of the charge air cooler, condenser and
radiator clean and free of debris. Periodically check the
hoses leading to and from the charge air cooler for cracks
or loose clamps resulting in loss of pressure and reduced
engine performance.
450 MAINTAINING YOUR VEHICLE

EMISSION CONTROL SYSTEM MAINTENANCE
The “Scheduled” 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 — 5.9L TURBO
DIESEL
There are two maintenance schedules that show the
requiredservice for your vehicle.
First is Schedule“B”. It is for vehicles that are operated
under one or more of the following conditions that are
listed below and at the beginning of the schedule.
•Frequent short trips where the engine does not achieve
full operating temperature (operating temperature de-
fined as 190° F (66° C ) coolant temperature).
•Extensive engine idling (over 10 minutes per hour of
operation) at ambient temperatures less than 32° F (0°
C).
•Driving in dusty conditions.
•Frequent trailer towing.
•Taxi, police, or delivery service (commercial service).
494 MAINTENANCE SCHEDULES
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Schedule “B”
Follow schedule “B” if you usually operate your vehicle
under one or more of the following conditions.
•Frequent short trips where the engine does not achieve
full operating temperature (operating temperature de-
fined as 190° F (66° C ) coolant temperature).
•Extensive engine idling (over 10 minutes per hour of
operation) at ambient temperatures less than 32° F (0°
C).
•Driving in dusty conditions.
•Frequent trailer towing.
•Taxi, police, or delivery service (commercial service).
•Off-road or desert operation.
•Extensive operation at high engine speeds (greater
than 2900 rpm) and loads (greater than 70% throttle).
NOTE:IfANYof these apply to you then change your
coolant every 100,000 miles (160 000 km) or 60 months,
whichever comes first and follow schedule “B” of the
Maintenance Schedulessection of this manual.
SCHEDULE “B” 497
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Drain, Flush, and Refill.................. 446
Inspection........................... 448
Points to Remember.................... 449
Pressure Cap......................... 447
Radiator Cap......................... 447
Selection of Coolant (Antifreeze).........446,488
Temperature Gauge..................... 200
Cruise Control (Speed Control).............. 139
CupHolder ............................ 172
Customer Assistance..................... 524
Customer Programmable Features............ 153
Data Recorder, Event...................... 58
Daytime Running Lights................... 131
Dealer Service.......................... 411
Defroster, Rear Window................. 88,181
Defroster, Windshield................ 77,258,261
Delay (Intermittent) Wipers................. 135
Diesel Exhaust Brake..................... 290Diesel Fuel............................ 348
Diesel Fuel Requirements.................. 348
Differential, Limited-Slip.................. 317
Dipsticks .............................. 414
Power Steering........................ 439
Disc Brakes............................ 451
Disposal.............................. 421
Engine Oil........................... 421
Used Coolant (Antifreeze)................ 448
Door Locks............................. 25
Door Locks, Automatic.................... 153
Door Opener, Garage..................... 160
Draining Fuel/Water Separator Filter.......427,430
DriveBelts ............................ 422
Dual Rear Wheels.....................347,396
DVD Player (Video Entertainment System)...... 249
Electric Rear Window Defrost............. 88,181
Electrical Power Outlets................... 169
INDEX 537
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Electronic Range Select (ERS)............... 295
Electronic Speed Control (Cruise Control)...... 139
Electronic Vehicle Information Center (EVIC).... 151
Electronically Shifted Transfer Case........... 310
Emergency Brake........................ 320
Emergency, In Case of
Freeing Vehicle When Stuck............... 402
Hazard Warning Flasher................. 386
Jacking............................. 389
Jump Starting......................... 399
Tow Hooks.......................... 403
Towing ............................. 404
Emission Control System Maintenance......... 494
Engine............................408,409
Air Cleaner........................422,424
Block Heater.......................276,283
Break-In Recommendations................ 74
Compartment......................408,409
Coolant (Antifreeze).................... 488Cooling ............................. 444
DataPlate ........................... 411
Identification......................408,409
Idling .............................. 286
Jump Starting......................... 399
Oil ..............................414,488
Oil Filler Cap......................... 418
Oil Synthetic.......................285,419
Runaway............................ 348
Temperature Gauge..................... 200
Event Data Recorder...................... 58
Exhaust Brake.......................... 290
Exhaust Gas Caution................ 76,190,444
Exhaust System................. 76,443,444,459
ExteriorLighting ........................ 130
Fabric Care............................ 465
Fan .................................. 450
538 INDEX

Filters
Engine Oil.....................414,419,488
Flashers
Turn Signal.......................... 133
Flat Tire Stowage.....................388,398
Fluid, Brake........................... 491
Fluid Capacities......................... 487
Fluid Level Checks
Brake............................... 452
Manual Transmission................... 455
Power Steering........................ 439
Transfer Case......................... 455
Fluids, Lubricants and Genuine Parts.......... 488
Fog Lights.......................132,202,477
Fold Flat Load Floor..................... 183
Four Wheel Drive....................... 306
Four-Way Hazard Flasher.................. 386
Freeing A Stuck Vehicle................... 402
Front Axle (Differential)................441,454Fuel..............................348,352
Adding............................. 352
Diesel......................348,350,352,488
Gauge.............................. 206
Light ............................... 206
Requirements......................348,350
Specifications......................349,351
Tank Capacity........................ 487
Fuses................................ 468
Garage Door Opener (HomeLink) ........... 160
Gauges............................... 198
Coolant Temperature.................... 200
Fuel................................ 206
Oil Pressure.......................... 200
Speedometer......................... 199
Tachometer.......................... 199
Voltmeter.........................198,282
Gear Ranges......................291,297,304
INDEX 539
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