RAM 2500 2021, Owner'S Manual

Page: 154 / 504

152 STARTING AND OPERATING
C
OOLING
S
YSTEM
T
IPS
To reduce potential for engine and transmission
overheating in high ambient temperature
conditions, take the following actions:

City Driving — When stopped, shift the trans -
mission into NEUTRAL and increase engine
idle speed.

Highway Driving — Reduce your speed.

Up Steep Hills — Select a lower transmission
gear.

Air Conditioning — Turn it off temporarily.
Do Not Operate The Engine With Low Oil
Pressure
When the engine is at normal operating
temperature, the minimum oil pressures
required are:
Do Not Operate The Engine With Failed
Parts
All engine failures give some warning before the
parts fail. Be on the alert for changes in
performance, sounds, and visual evidence that
the engine requires service. Some important
clues are:

Engine misfiring or vibrating severely.

Sudden loss of power.

Unusual engine noises.

Fuel, oil or coolant leaks.

Sudden change, outside the normal oper -
ating range, in the engine operating tempera -
ture.

Excessive smoke.

Oil pressure drop.
ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms the engine, and
permits quicker starts in cold weather. Connect
the cord to a standard 110-115 Volt AC
electrical outlet with a grounded, three-wire
extension cord.
For ambient temperatures below 0°F (-18°C),
engine block heater usage is recommended.
For ambient temperatures below –20°F
(-29°C), engine block heater usage is required.
The engine block heater cord is routed through
the grille by the right front tow hook.
It includes a removable cap that is secured by a
tethered strap. It also has a c-clip that is used
for storage when not in use for the Winter
months. During Winter months, remove the
heater cord wiring assembly from itself on the
c-clip.
The engine block heater must be plugged in at
least one hour to have an adequate warming
effect on the engine.
Idle 700 to 800 RPM 10 psi (69 kPa)
Full speed and load 30 psi (207 kPa)
CAUTION!
If oil pressure falls to less than normal read -
ings, shut the engine off immediately. Failure
to do so could result in immediate and severe
engine damage.
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