2018 Ram ProMaster radiator cap

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate action.
•On the highways — slow down.
• In city traffic — while stopped, place the transmission in
NEUTRAL, but do not increase the engine idle speed
while preventing vehicle motion with the brakes. NOTE:
There are steps that you can take to slow down an
impending overheat condition:
• If your air conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
• You can also turn the temperature control to maximum
heat, the mode control to floor and the blower control to
high. This allows the heater core to act as a supplement
to the radiator and aids in removing heat from the
engine cooling system.
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.
Battery Location
218 IN CASE OF EMERGENCY

WARNING!(Continued)
•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 is hot.
Coolant Checks
Check the engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, where appli-
cable). If the engine coolant (antifreeze) is dirty, the system
should be drained, flushed, and refilled with fresh OAT
coolant (conforming to MS-12106) only by an authorized
dealer. Check the front of the A/C condenser for any
accumulation of bugs, leaves, etc. If dirty, clean by gently
spraying water from a garden hose vertically down the face
of the condenser.
Cooling System — Drain, Flush And Refill
NOTE: 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 autho-
rized dealer.
If the engine coolant (antifreeze) is dirty or contains visible
sediment, have an authorized dealer clean and flush with
OAT coolant (antifreeze) (conforming to MS.90032).
Refer to the “Maintenance Plan” in this section for the
proper maintenance intervals.
Selection Of Coolant
Refer to “Fluids And Lubricants” in “Technical Specifica-
tions” for further information.
CAUTION!
• Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT) en-
gine coolant (antifreeze), may result in engine dam-
age and may decrease corrosion protection. Organic
(Continued)
242 SERVICING AND MAINTENANCE

•Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant (anti-
freeze) 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 prop-
erly. 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 a local autho-
rized 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 pos-
sible.Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant
(antifreeze) will return to the radiator from the coolant
recovery tank.
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 over-
heated. 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 speci-
fied for your vehicle. Personal injury or engine
damage may result.
Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a regu-
lated substance requiring proper disposal. Check with your
local authorities to determine the disposal rules for your
244 SERVICING AND MAINTENANCE

Brake Control System, Electronic................89
Brake Fluid .......................... .246, 288
Brake, Parking ............................ .139
Brake System ......................... .246, 280
Anti-Lock (ABS) ..........................88
Fluid Check ........................... .246
Master Cylinder ........................ .246
Parking .............................. .139
Warning Light ...........................76
Brake/Transmission Interlock ..................142
Bulb Replacement ......................... .179
Bulbs, Light .......................... .133, 179
Camera, Rear ............................ .157
Capacities, Fluid .......................... .286
Caps, Filler Fuel ................................. .159
Oil (Engine) ........................... .232
Power Steering ......................... .150
Radiator (Coolant Pressure) .................244
Carbon Monoxide Warning ................131, 285
Cargo Area Features .........................57
Cargo Compartment .........................57
Cargo Light ...............................42
Car Washes .............................. .273Cellular Phone
........................... .306
Certification Label ......................... .161
Changing A Flat Tire .....................195, 248
Chart, Tire Sizing .......................... .250
Check Engine Light (Malfunction Indicator Light) ....84
Checking Your Vehicle For Safety ...............130
Checks, Safety ............................ .130
Child Restraint ........................... .123
Child Restraints Booster Seats ........................... .126
Child Restraints ........................ .123
Child Seat Installation .....................129
Infants And Child Restraints ................125
Older Children And Child Restraints ...........126
Clean

Air Gasoline ........................ .282
Cleaning Wheels ............................... .267
Climate Control ............................45
Cold Weather Operation ..................... .137
Compact Disc (CD) Maintenance ................314
Compact Spare Tire ........................ .265
Contract, Service .......................... .318
Coolant Pressure Cap (Radiator Cap) .............244
Cooling System ........................... .241
Adding Coolant (Antifreeze) .................243
12
INDEX 323

Coolant Capacity........................ .286
Coolant Level ....................... .242, 245
Disposal Of Used Coolant ..................244
Drain, Flush, And Refill ....................242
Inspection ............................. .245
Points To Remember ..................... .245
Pressure Cap ........................... .244
Radiator Cap .......................... .244
Selection Of Coolant (Antifreeze) ..........242, 286
Corrosion Protection ....................... .272
Cruise Light ...............................82
Cupholders ........................... .60, 276
Customer Assistance ....................... .316
Customer Programmable Features ...............291
Dealer Service ............................ .234
Defroster, Windshield ....................... .132
Diagnostic System, Onboard ....................82
Dimmer Control ............................43
Dimmer Switch, Headlight .....................39
Dipsticks Automatic Transmission ....................248
Power Steering ......................... .150
Disabled Vehicle Towing .....................221 Disposal
Antifreeze (Engine Coolant) .................244
Door Ajar .................................75
Door Ajar Light ............................75
Door Locks ................................22
Door Locks, Automatic .......................23
Driver’s Seat Back Tilt ........................23
Driving Through Flowing, Rising, Or Shallow Standing
Water ................................ .174
Electric Remote Mirrors .......................35
Electronic Brake Control System .................89
Electronic Speed Control (Cruise Control) .........150
Electronic Stability Control (ESC) ................90
Electronic Throttle Control Warning Light ..........75
Emergency, In Case Of Freeing Vehicle When Stuck .................219
Jacking ........................... .195, 248
Jump Starting .......................... .214
Emission

Control System Maintenance ............84
Engine ................................. .232
Air Cleaner ............................ .236
Block Heater ........................... .138
Break-In Recommendations .................138
324 INDEX

Viscosity.......................... .235, 286
Oil Filter, Change ......................... .236
Oil Filter, Selection ......................... .236
Oil Pressure Light ...........................77
Onboard Diagnostic System ....................82
Operating Precautions ........................82
Operator Manual (Owner’s Manual) ...............4
Outside Rearview Mirrors ...................34, 35
Overheating, Engine ....................... .218
Owner’s Manual (Operator Manual) ...........4,320
Paint Care ............................... .272
Parking Brake ............................ .139
ParkSense System, Rear ..................... .153
Passing Light ..............................40
Personal Settings .......................... .291
Pets ................................... .130
Placard, Tire And Loading Information ...........254
Power Mirrors ................................35
Steering ........................... .149, 150
Windows ...............................54
Power Steering Fluid ....................... .288
Pregnant Women And Seat Belts ................108
Preparation For Jacking ..................... .200Pretensioners
Seat Belts ............................. .108
Radial Ply Tires ........................... .260
Radiator Cap (Coolant Pressure Cap) .............244
Radio Frequency General Information .....................18, 21
Radio Operation .......................... .306
Rear Camera ............................. .157
Rear ParkSense System ..................... .153
Rear Seat, Folding ...........................23
Rearview Mirrors ...........................34
Recreational Towing ........................ .173
Reformulated Gasoline ...................... .282
Refrigerant .............................. .238
Release, Hood ..............................56
Reminder, Seat Belt ........................ .101
Remote

Keyless Entry
Programming Additional Key Fobs .............18
Remote Sound System (Radio) Controls ...........304
Replacement Bulbs ........................ .179
Replacement Keys ...........................20
Replacement Tires ......................... .263
Reporting Safety Defects .....................319
Restraint, Head .............................32
12
INDEX 329