2007 RAM CHASSIS CAB cooling

Adding Coolant
Your vehicle has been built with an improved engine
coolant that allows extended maintenance intervals. This
coolant can be used up to 5 Years or 100,000 miles before
replacement. To prevent reducing this extended mainte-
nance period, it is important that you use the same
coolant throughout the life of your vehicle. Please review
these recommendations for using Hybrid Organic Addi-
tive Technology (HOAT) coolant.
When adding coolant, a minimum solution of 50% rec-
ommended Mopar Antifreeze/ Coolant 5 Year/100,000
Mile Formula HOAT (Hybrid Organic Additive Technol-
ogy), or equivalent, in water should be used. Use higher
concentrations (not to exceed 70%) if temperatures below

34°F (
37°C ) are anticipated.
Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant solution. The use of lower quality water will reduce the amount of
corrosion protection in the engine cooling system.
Please note that it is the owner’s responsibility to main-
tain the proper level of protection against freezing ac-
cording to the temperatures occurring in the area where
the vehicle is operated.
NOTE: Mixing coolant types will decrease the life of the
engine coolant and will require more frequent coolant
changes.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
coolant, and to insure that coolant will return to the
radiator from the coolant recovery bottle.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces. MAINTAINING YOUR VEHICLE 429
7

WARNING!• The warning words “DO NOT OPEN HOT” on
the cooling system pressure cap are a safety pre-
caution. Never add coolant when the engine is
overheated. Do not loosen or remove the cap to
cool an overheated engine. Heat causes pressure
to 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.
• Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or
engine damage may result. Disposal Of Used Engine Coolant
Used ethylene glycol based engine coolant is a regulated
substance requiring proper disposal. Check with your
local authorities to determine the disposal rules for your
community. Do not store ethylene glycol-based engine
coolant in open containers or allow it to remain in
puddles on the ground. Prevent ingestion by animals and
children. If ingested by a child, contact a physician
immediately. Clean up any ground spills immediately.
Coolant Level
The coolant bottle provides a quick visual method for
determining that the coolant level is adequate. With the
engine cold, the level of the coolant in the coolant
recovery bottle should be between the ranges indicated
on the bottle.430 MAINTAINING YOUR VEHICLE

The radiator normally remains completely full, so there is
no need to remove the radiator cap unless checking for
coolant freeze point or replacing coolant. Advise your
service attendant of this. As long as the engine operating
temperature is satisfactory, the coolant bottle need only
be checked once a month.
When additional coolant is needed to maintain the
proper level, it should be added to the coolant bottle. Do
not overfill.
Points To Remember
NOTE: When the vehicle is stopped after a few miles (a
few kilometers) of operation, you may observe vapor
coming from the front of the engine compartment. This is
normally a result of moisture from rain, snow, or high
humidity accumulating on the radiator and being vapor-
ized when the thermostat opens, allowing hot coolant to
enter the radiator. If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.
• Do not overfill the coolant recovery bottle.
• Check coolant freeze point in the radiator and in the
coolant recovery bottle. If antifreeze needs to be
added, contents of coolant recovery bottle must also be
protected against freezing.
• If frequent coolant additions are required, or if the
level in the coolant recovery bottle does not drop when
the engine cools, the cooling system should be pres-
sure tested for leaks.
• Maintain coolant concentration at 50% HOAT engine
coolant (minimum) and distilled water for proper
corrosion protection of your engine which contains
aluminum components. MAINTAINING YOUR VEHICLE 431
7

• Make sure that the radiator and coolant recovery
bottle overflow hoses are not kinked or obstructed.
• 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 (Diesel
Engines)
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 the432 MAINTAINING YOUR VEHICLE

Among those acts presumed to constitute tampering are
the acts listed below.
• AIR CLEANER
Removal of the air cleaner.
Removal of the air cleaner filter element from the air
cleaner housing.
Removal of the air ducting.
• EXHAUST SYSTEM
Removal or rendering inoperative exhaust system
components including the muffler or tailpipe.
• ENGINE COOLING SYSTEM
Removal or rendering inoperative the fan clutch.
Removal of the fan shroud. Noise Emission Warranty
The manufacturer warrants that this vehicle as manufac-
tured by the manufacturer, was designed, built and
equipped to conform at the time it left the manufacturer’s
control with all applicable U.S. EPA Noise Control Regu-
lations.
This warranty covers this vehicle as designed, built and
equipped by the manufacturer, and is not limited to any
particular part, component or system of the vehicle
manufactured by the manufacturer. Defects in design,
assembly or in any part, component or system of the
vehicle as manufactured by the manufacturer, which, at
the time it left the manufacturer’s control, caused noise
emissions to exceed Federal standards, are covered by
this warranty for the life of the vehicle. MAINTAINING YOUR VEHICLE 447
7

FLUID AND CAPACITIES
U.S. Metric
Fuel (Appoximate)
6.7L HO Turbo Diesel
Engine
Standard Rear Tank 52 gal. 198 L
Optional Midship Tank 22 gal. 85L
Fuel (Appoximate)
5.7L Gas Engine
Standard Rear Tank 52 gal. 197L
Optional Midship Tank 22 gal. 83L
Engine Oil (with filter)
6.7L HO Turbo Diesel
Engine (SAE 15W-40, API
CJ-4 Certified, that meets
CES 20081 Standards.) 12 qts. 11.4L U.S. Metric
5.7L Gas Engine V-8 (SAE
5W-30, API Certified).
For trucks operating un-
der a gross combined
weight rating greater
than 14,000 lbs. 7.0 qts. 6.6L
5.7L Gas Engine V-8 (SAE
5W-20, API Certified).
For trucks operating un-
der a gross combined
weight rating less than
14,000 lbs. 7.0 qts. 6.6L
Cooling System
6.7L Diesel Engine I-6 22.6 qts. 21.4L
5.7L Gas Engine (Mopar 
Antifreeze/Coolant 5
Year/100,000 Mile For-
mula) or equivalent 18.7 qts. 17.7L468 MAINTAINING YOUR VEHICLE

Catalyst Full Message ..................... 415
Catalytic Converter ...................... 413
CD (Compact Disc) Player ............ 182,190,204
Cellular Phone .......................... 87
Center Lap Belts ......................... 45
Center Seat Storage Compartment ......... 155,157
Certification Label ....................... 338
Charge Air Cooler ....................... 432
Chart, Tire Sizing ........................ 306
Check Engine Light (Malfunction Indicator Light) . 176
Child Restraint ........................ 59,60
Child Restraint Tether Anchors ............. 64,67
Child Seat ............................ 60,66
Cigar Lighter ........................... 151
Cleaning
Wheels ............................. 454
Climate Control ......................... 230
Clock ..................... 180,185,192,205,219
Clutch Linkage Maintenance ................ 436 Compact Disc (CD) Maintenance ............. 229
Compact Spare Tire ...................... 318
Compass .............................. 138
Compass Calibration .................. 138,148
Compass Variance .................... 140,148
Computer, Trip/Travel .................... 134
Console, Overhead ....................... 141
Contract, Service ........................ 506
Coolant Pressure Cap (Radiator Cap) .......... 429
Cooling System ......................... 426
Adding Coolant (Antifreeze) .............. 429
Coolant Capacity ...................... 468
Coolant Level ................... 426,427,430
Disposal of Used Coolant ................ 430
Drain, Flush, and Refill .................. 427
Inspection ........................... 430
Points to Remember .................... 431
Pressure Cap ......................... 429
Radiator Cap ......................... 429516 INDEX

Emergency, In Case of
Freeing Vehicle When Stuck ............... 385
Hazard Warning Flasher ................. 370
Jacking ............................. 372
Jump Starting ......................... 382
Tow Hooks .......................... 386
Towing ............................. 387
Emission Control System Maintenance ......... 474
Emission Related Components .............. 418
Engine ............................ 392,393
Air Cleaner ........................ 406,407
Block Heater .................... 252,259,265
Break-In Recommendations ................ 72
Compartment ......................... 392
Compartment Identification ............... 393
Coolant (Antifreeze) .................... 469
Cooling ............................. 426
Data Plate ........................... 395
Exhaust Gas Caution .................... 330 Flooded, Starting ...................... 249
Identification ......................... 392
Idling .............................. 261
Jump Starting ......................... 382
Oil .............................. 398,469
Oil Filler Cap ...................... 401,403
Oil Selection .......................... 401
Oil Synthetic ....................... 260,403
Runaway ............................ 327
Temperature Gauge ..................... 174
Event Data Recorder ...................... 57
Exhaust Brake .......................... 265
Exhaust Gas Caution ................ 75, 330,425
Exhaust System .................... 75, 425,446
ExteriorLighting ........................ 124
Fabric Care ............................ 454
Fan .................................. 432518 INDEX