2018 Ram 3500 Chassis Cab engine overheat

CAUTION!
•The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective-
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
• Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly involv-
ing engine misfire or other apparent loss of perfor-
mance, have your vehicle serviced promptly. Contin-
ued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to assure proper catalyst
operation and prevent possible catalyst damage.
NOTE: Intentional tampering with emissions control sys-
tems can result in civil penalties being assessed against
you. In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe and
abnormal catalyst overheating. If this occurs, stop the
vehicle, turn off the engine and allow it to cool. Service,
including a tune-up to manufacturer’s specifications,
should be obtained immediately.
To minimize the possibility of catalytic converter damage:
•
Do not interrupt the ignition when the transmission is in
gear and the vehicle is in motion.
• Do not try to start the vehicle by pushing or towing the
vehicle.
• Do not idle the engine with any ignition components
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
8
SERVICING AND MAINTENANCE 381

•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
expansion bottle/recovery tank if so equipped.
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.
384 SERVICING AND MAINTENANCE

CNG And LP Fuel System Modifications
Modifications that allow the engine to run on compressed
natural gas (CNG) or liquid propane (LP) may result in
damage to the engine, emissions, and fuel system compo-
nents. Problems that result from running CNG or LP are
not the responsibility of the manufacturer and may void or
not be covered under the New Vehicle Limited Warranty.
MMT In Gasoline
Methylcyclopentadienyl Manganese Tricarbonyl (MMT) is
a manganese-containing metallic additive that is blended
into some gasoline to increase octane. Gasoline blended
with MMT provides no performance advantage beyond
gasoline of the same octane number without MMT. Gaso-
line blended with MMT reduces spark plug life and
reduces emissions system performance in some vehicles.
The manufacturer recommends that gasoline without
MMT be used in your vehicle. The MMT content of
gasoline may not be indicated on the gasoline pump;
therefore, you should ask your gasoline retailer whether
the gasoline contains MMT. MMT is prohibited in Federal
and California reformulated gasoline.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gasoline is prohibited by Federal
law. Using leaded gasoline can impair engine perfor-
mance and damage the emissions control system.
• An out-of-tune engine or certain fuel or ignition
malfunctions can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact your authorized dealer for service assistance.
• The use of fuel additives, which are now being sold
as octane enhancers, is not recommended. Most of
these products contain high concentrations of metha-
nol. Fuel system damage or vehicle performance
problems resulting from the use of such fuels or
additives is not the responsibility of the manufac-
turer and may void or not be covered under the New
Vehicle Limited Warranty.
430 TECHNICAL SPECIFICATIONS

Door Ajar Light........................... .150
Door Locks, Automatic .......................39
Door Opener, Garage .........................99
Driver’s Seat Back Tilt ........................41
Driving Through Flowing, Rising, Or Shallow Standing
Water ................................ .314
Dual Rear Wheels ....................341, 415, 425
Electrical Power Outlets ......................119
Electronically Shifted Transfer Case ..............259
Electronic Brake Control System ................161
Anti-Lock Brake System ....................160
Electronic Roll Mitigation ...................169
Traction Control System ....................165
Electronic Range Select (ERS)..................252
Electronic Speed Control (Cruise Control) .........267
Electronic Stability Control (ESC) ...............165
Electronic Throttle Control Warning Light .........149
Emergency Brake .......................... .243
Emergency, In Case Of Freeing Vehicle When Stuck .................348
Hazard Warning Flasher ...................318
Jacking ............................... .337
Jump Starting .......................... .343Emission Control System Maintenance
............157
Engine ................................. .362
Air Cleaner ............................ .366
Break-In Recommendations .................242
Compartment Identification .................362
Coolant (Antifreeze) ..................... .433
Exhaust Gas Caution ...................231, 431
Fails To Start ........................... .241
Flooded, Starting ........................ .241
Fuel Requirements ....................... .428
Jump Starting .......................... .343
Oil .............................. .365, 433
Oil Filler Cap ....................... .362, 366
Oil Filter .............................. .366
Oil

Selection ........................... .365
Oil Synthetic ........................... .366
Overheating ........................... .346
Engine Oil Viscosity ........................ .366
Enhanced Accident Response Feature .........203, 353
Entry System, Illuminated .....................76
Ethanol ................................. .429
Exhaust Gas Caution .....................231, 431
Exhaust System ....................... .231, 380
Exterior Lighting ............................67
12
INDEX 513

Occupant Restraints........................ .179
Octane Rating, Gasoline (Fuel) .................428
Oil, Engine ........................... .365, 433
Capacity .............................. .432
Change Interval ........................ .365
Dipstick .............................. .363
Disposal .............................. .366
Filter ............................. .366, 433
Filter Disposal .......................... .366
Identification Logo ...................... .365
Materials Added To ...................... .366
Pressure Warning Light ....................149
Recommendation ........................ .365
Synthetic ............................. .366
Viscosity .............................. .366
Oil Filter, Change ......................... .366
Oil Filter, Selection ......................... .366
Oil Pressure Light ......................... .149
Onboard Diagnostic System ...................156
Operating Precautions ...................... .156
Operator Manual (Owner’s Manual) ...............5
Outside Rearview Mirrors .....................61
Overdrive ............................... .253
Overdrive OFF Switch ...................... .253
Overheating, Engine ....................... .346Owner’s Manual (Operator Manual)
...........5,508
Paint Care ............................... .417
Panic Alarm ...............................22
Parking Brake ............................ .243
ParkSense System, Rear ...................270, 278
Passive Entry ..............................36
Pedals, Adjustable ...........................57
Personalized Menu Bar ..................... .439
Personal Settings .......................... .140
Pets ................................... .230
Placard, Tire And Loading Information ...........398
Power Distribution

Center (Fuses) ..................330
Door Locks ..............................36
Mirrors ................................62
Outlet (Auxiliary Electrical Outlet) .........119,123
Seats ..................................44
Steering ........................... .266, 267
Take-Off Adapter ........................ .264
Take-Off Operation ...................... .264
Windows ...............................96
Power Seats Down .............................. .45, 46
Forward ............................ .44, 46
518 INDEX