2007 DODGE RAM 1500 GAS cooling

drain from the coolant recovery bottle. DO NOT RE-
MOVE THE COOLANT PRESSURE CAP WHEN THE
COOLING SYSTEM IS HOT.
Cooling System — Drain, Flush and Refill
At the intervals shown on the Maintenance Schedules,
the system should be drained, flushed and refilled.
If the solution is dirty or contains a considerable amount
of sediment, clean and flush with a reliable cooling
system cleaner. Follow with a thorough rinsing to remove
all deposits and chemicals. Properly dispose of old
antifreeze solution.
Selection Of Coolant
Use only the manufacturers recommended coolant, refer
to Fluids, Lubricants and Genuine Parts for correct
coolant type.
CAUTION!
Mixing of coolants other than specified HOAT en-
gine coolants, may result in engine damage and may
decrease corrosion protection. If a non-HOAT cool-
ant is introduced into the cooling system in an
emergency, it should be replaced with the specified
coolant as soon as possible.
Do not use plain water alone or alcohol base engine
coolant (antifreeze) products. Do not use additional
rust inhibitors or antirust products, as they may not
be compatible with the radiator engine coolant and
may plug the radiator.
This vehicle has not been designed for use with
Propylene Glycol based coolants. Use of Propylene
Glycol based coolants is not recommended.
470 MAINTAINING YOUR VEHICLE

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 471
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. To prevent ingestion by animals or childrendo not store ethylene glycol based engine coolant in open
containers or allow it to remain in puddles on the
ground. 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.
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.
472 MAINTAINING YOUR VEHICLE

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.
•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.
MAINTAINING YOUR VEHICLE 473
7

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 manufacturers
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 manufacturers control, caused noise
emissions to exceed Federal standards, are covered by
this warranty for the life of the vehicle.
MAINTAINING YOUR VEHICLE 485
7

U.S. Metric
5.7L Engine V-8 (SAE 5W-20, API Certified). For trucks
operating under a gross combined weight ratingless
than 14,000 lbs.7.0 qts. 6.6L
5.7L Engine V-8 (SAE 5W-30, API Certified). For 2500/
3500 trucks operating under a gross combined weight
ratinggreaterthan 14,000 lbs.7.0 qts. 6.6L
Cooling System
3.7L (MoparAntifreeze/Coolant 5 Year/100,000 Mile
Formula) or equivalent.17 qts. 16L
4.7L (MoparAntifreeze/Coolant 5 Year/100,000 Mile
Formula) or equivalent.17 qts. 16L
5.7L (MoparAntifreeze/Coolant 5 Year/100,000 Mile
Formula) or equivalent.18.7 qts. 17.7L
MAINTAINING YOUR VEHICLE 513
7

Cellular Phone.......................... 126
Center High Mounted Stop Light............ 506
Center Lap Belts.......................43,83
Center Seat Storage Compartment.........203,204
Certification Label....................... 389
Chart, Tire Sizing........................ 359
Check Engine Light (Malfunction Indicator Light) . 231
Child Restraint...................60,61,99,100
Child Restraint Tether Anchors.......64,68,103,107
Child Seat......................61,67,100,106
Cigar Lighter........................... 198
Cleaning
Wheels............................. 489
Climate Control......................... 283
Clock.....................236,240,248,262,275
Clutch............................... 477
Clutch Linkage Maintenance................ 477
Compact Disc (CD) Maintenance............. 282
Compact Spare Tire...................... 370Compass...........................183,184
Compass Calibration..................... 184
Compass Variance....................... 185
Computer, Trip/Travel.................... 180
Console, Overhead....................... 179
Contract, Service........................ 544
Coolant Pressure Cap (Radiator Cap).......... 471
Cooling System......................... 469
Adding Coolant (Antifreeze).............. 471
Coolant Capacity...................... 512
Coolant Level......................469,472
Disposal of Used Coolant................ 472
Drain, Flush, and Refill.................. 470
Inspection........................... 472
Points to Remember.................... 473
Pressure Cap......................... 471
Radiator Cap......................... 471
Selection of Coolant (Antifreeze)......470,512,514
Temperature Gauge..................... 229
552 INDEX

Radial.............................. 369
Replacement......................... 373
Rotation............................. 377
Safety...........................358,366
Sizes............................... 359
Snow Tires........................... 377
Spare Tire........................... 426
Spinning............................ 371
Tread Wear Indicators................... 372
Wheel Mounting....................... 427
Wheel Nut Torque..................... 432
Tongue Weight/Trailer Weight.............. 397
Torque Converter Clutch.................. 312
Tow Hooks, Emergency................... 442
Towing............................... 392
Disabled Vehicle....................... 443
Guide.............................. 397
Recreational.......................... 410
Weight.............................. 397Traction.............................. 337
Traction Control......................234,345
Trailer Towing.......................... 392
Cooling System Tips.................... 404
Hitches............................. 396
Minimum Requirements................. 398
Mirrors..........................124,404
Trailer and Tongue Weight................ 397
Wiring.............................. 401
Trailer Towing Guide..................... 397
Trailer Weight.......................... 397
Transaxle
Automatic............................ 12
Manual.............................. 14
Transfer Case........................... 479
Electronically Shifted.................321,329
Fluid............................... 515
Transmission
Automatic........................307,480
INDEX 565
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