radiator cap RAM CHASSIS CAB 2016 Owners Manual

supplement to the radiator and aids in removing heat
from the engine cooling system.
CAUTION!Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads HOT
(H), pull over and stop the vehicle. Idle the vehicle
with the air conditioner turned off until the pointer
drops back into the normal range. If the pointer
remains on HOT (H), and you hear continuous
chimes, turn the engine off immediately and call for
service. WARNING!You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the radiator has had time
to cool. Never try to open a cooling system pressure
cap when the radiator or coolant bottle is hot.
WHEEL AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to ensure
that the wheel is properly mounted to the vehicle. Any
time a wheel has been removed and reinstalled on the
vehicle the lug nuts/bolts should be torqued using a
properly calibrated torque wrench. 6WHAT TO DO IN EMERGENCIES 537

To minimize the possibility of catalytic converter damage:
• Do not shut off the engine or interrupt the ignition,
when the transmission is in gear and the vehicle is in
motion.
• Do not try to start the engine by pushing or towing the
vehicle.
• Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idle or malfunctioning operating conditions.
Cooling System
WARNING!You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If (Continued) WARNING! (Continued)you see or hear steam coming from under the hood,
do not open the hood until the radiator has had time
to cool. Never try to open a cooling system pressure
cap when the radiator is hot.
Engine Coolant Checks
Check the engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, where
applicable). If the engine coolant (antifreeze) is dirty or
rusty in appearance, the system should be drained,
flushed and refilled with fresh coolant. Check the front of
the A/C condenser (if equipped) or radiator for any
accumulation of bugs, leaves, etc. If dirty, clean by gently
spraying water from a garden hose vertically down the
face of the A/C condenser (if equipped) or the back of the
radiator core. 7MAINTAINING YOUR VEHICLE 587

Check the engine cooling system hoses for brittle rubber,
cracking, tears, cuts and tightness of the connection at the
coolant recovery bottle and radiator. Inspect the entire
system for leaks.
With the engine at normal operating temperature (but
not running), check the cooling system pressure cap for
proper vacuum sealing by draining a small amount of
engine coolant (antifreeze) from the radiator drain cock.
The radiator drain cock is located in the lower radiator
tank. If the cap is sealing properly, the engine coolant
(antifreeze) will begin to drain from the coolant expan-
sion bottle. DO NOT REMOVE THE COOLANT PRES-
SURE CAP WHEN THE COOLING SYSTEM IS HOT.
Cooling System — Drain Flush And Refill
If the engine coolant (antifreeze) 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 engine coolant (antifreeze).
Refer to the “Maintenance Schedule” for the proper
maintenance intervals.
Selection Of Coolant
Refer to “Fluids, Lubricants, And Genuine Parts” in
“Maintaining Your Vehicle” for further information.
CAUTION!• Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT) en-
gine coolant (antifreeze), may result in engine
damage and may decrease corrosion protection.
Organic Additive Technology (OAT) engine cool-
ant is different and should not be mixed with (Continued)588 MAINTAINING YOUR VEHICLE

• Mix a minimum solution of 50% OAT engine coolant
that meets the requirements of FCA Material Standard
MS.90032 and distilled water. Use higher concentra-
tions (not to exceed 70%) if temperatures below 34°F
(37°C) are anticipated. Please contact your authorized
dealer for assistance.
• Use only high purity water such as distilled or deion-
ized water when mixing the water/engine coolant
(antifreeze) solution. The use of lower quality water
will reduce the amount of corrosion protection in the
engine cooling system.
NOTE:
• It is the owner’s responsibility to maintain the proper
level of protection against freezing according to the
temperatures occurring in the area where the vehicle is
operated. • Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could
lead to severe internal engine damage. If any coolant is
needed to be added to the system, please contact your
local authorized dealer.
• Mixing engine coolant (antifreeze) types is not recom-
mended and can result in cooling system damage. If
HOAT and OAT coolant are mixed in an emergency,
have a authorized dealer drain, flush, and refill with
OAT coolant (conforming to MS.90032) as soon as
possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that the engine coolant
(antifreeze) will return to the radiator from the coolant
expansion bottle.590 MAINTAINING YOUR VEHICLE

The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
WARNING!• Do not open hot engine cooling system. Never add
engine coolant (antifreeze) 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 en-
gine damage may result.
Disposal Of Used Engine Coolant
Used ethylene glycol-based engine coolant (antifreeze) is
a regulated substance requiring proper disposal. Check with your local authorities to determine the disposal
rules for your community. To prevent ingestion by ani-
mals or children, do not store ethylene glycol-based
engine coolant (antifreeze) in open containers or allow it
to remain in puddles on the ground. If ingested by a child
or pet, seek emergency assistance immediately. Clean up
any ground spills immediately.
Checking Coolant Level — 6.4L Engine
The level of the coolant in the pressurized coolant bottle
should be between the “MIN” and “MAX” range on the
bottle when the engine is cold.
The radiator normally remains completely full, so there is
no need to remove the cap unless checking for coolant
freeze point or replacing engine coolant (antifreeze).
Advise your service attendant of this. As long as the
engine operating temperature is satisfactory, the coolant 7MAINTAINING YOUR VEHICLE 591

Bulb Replacement ........................ .618
Bulbs, Light ......................... .120, 617
Cab Top Clearance Lights .................. .624
Camera, Rear ........................... .205
Capacities, Antifreeze (Engine Coolant) ......... .626
Capacities, Fluid ......................... .626
Caps, Filler
Oil (Engine) .......................... .571
Power Steering ........................ .438
Radiator (Coolant Pressure) ............... .590
Carbon Monoxide Warning ...............117,502
Cargo Light ............................ .172
Car Washes ............................ .601
Center High Mounted Stop Light ............. .622
Center Seat Storage Compartment ............ .222
Certification Label ........................ .504
Chart, Tire Sizing ........................ .461
Check Engine Light (Malfunction Indicator Light) . .566 Checking Your Vehicle For Safety ..............116
Checks, Safety ............................116
Child Restraint ............................83
Child Restraints
Booster Seats ...........................88
Child Restraints .........................83
Child Seat Installation ................ .102, 104
How To Stow An Unused ALR Seat Belt ........99
Infants And Child Restraints ................86
Install A LATCH-Compatible Child Restraint ....98
Installing Child Restraints Using The Vehicle Seat
Belt ................................ .101
Locating The LATCH Anchorages ............96
Lower Anchors And Tethers For Children .......91
Older Children And Child Restraints ..........87
Seating Positions ........................90
Cigar Lighter ........................... .215
Clean Air Gasoline ....................... .499654 INDEX

Cleaning
Wheels .............................. .603
Climate Control ...................... .351, 361
Automatic ........................... .361
Cold Weather Operation ................... .403
Compact Disc (CD) Maintenance ............. .348
Compact Spare Tire ....................... .478
Console, Overhead ....................... .208
Contract, Service ......................... .643
Coolant Pressure Cap (Radiator Cap) .......... .590
Cooling System .......................... .587
Adding Coolant (Antifreeze) .............. .589
Coolant Capacity ...................... .626
Coolant Level ..................... .587, 591
Disposal Of Used Coolant ................ .591
Drain, Flush, And Refill .................. .588
Inspection ........................... .591
Points To Remember .................... .592
Pressure Cap ......................... .590 Radiator Cap ......................... .590
Selection Of Coolant (Antifreeze) ........ .588, 627
Corrosion Protection ...................... .600
Cruise Light ......................... .266, 267
Cupholders ............................ .217
Customer Assistance ...................... .641
Customer Programmable Features ............ .329
Data Recorder, Event .......................82
Daytime Running Lights ................... .165
Dealer Service ........................... .568
Defroster, Rear Window .................... .226
Defroster, Windshield ...................119,354
Delay (Intermittent) Wipers ................. .175
Differential, Limited-Slip ................... .434
Dipsticks
Automatic Transmission ................. .598
Power Steering ........................ .438
Disabled V ehicle Towing ................... .55610 INDEX 655

Power Seats
Down ........................... .144, 145
Forward ......................... .144, 145
Rearward ........................ .144, 145
Recline .............................. .144
Tilt ................................ .145
Up ............................. .144, 145
Power Steering Fluid ...................... .629
Pregnant Women And Seat Belts ...............64
Pretensioners
Seat Belts ..............................65
Programmable Electronic Features ......... .282, 305
Programming Transmitters (Remote Keyless Entry) . .25
PTO (Power Take-Off) ..................... .420
Radial Ply Tires ......................... .475
Radiator Cap (Coolant Pressure Cap) ....... .588, 590
Radio Frequency
General Information ........... .19, 21, 33, 36, 46 Radio Operation ......................... .349
Radio (Sound Systems) .................... .346
Rain Sensitive Wiper System ................ .177
Rear Axle (Differential) ................. .595, 596
Rear ParkSense System ................. .187, 196
Rear Window Features .................... .226
Rear Window, Sliding ..................... .228
Reclining Rear Seats ...................... .151
Recorder, Event Data .......................82
Recreational Towing ...................... .528
Shifting Into Transfer Case Neutral (N) ....... .531
Shifting Out Of Transfer Case Neutral (N) ..... .533
Reformulated Gasoline .................... .499
Refrigerant ............................. .579
Reminder, Seat Belt .........................52
Remote Control
Starting System .........................33
Remote Keyless Entry (RKE) ............... .25, 27
Programming Additional Key Fobs ...........21664 INDEX