RAM Truck Diesel Supplement 2012, Owner'S Manual

Page: 51 / 174

Usually the engine coolant (antifreeze) temperature indi-
cated during operation will be to the left of center in the
normal range of the gauge.
Avoid Low Coolant Temperature Operation
Continual operation at low engine coolant (antifreeze)
temperature below the normal range on the gauge 140°F
(60°C) can be harmful to the engine. Low engine coolant
(antifreeze) temperature can cause incomplete combus-
tion which allows carbon and varnish to form on piston
rings and injector nozzles. Also, the unburned fuel can
enter the crankcase, diluting the lubricating oil and
causing rapid wear to the engine.
Cooling System Tips – Automatic Transmission
To reduce potential for engine and transmission over-
heating in high ambient temperature conditions, take the
following actions:
•
City Driving —
When stopped, shift the transmission into NEUTRAL
and increase engine idle speed.
•
Highway Driving —
Reduce your speed.
•
Up Steep Hills —
Select a lower transmission gear, but try and keep the
torque converter clutch engaged.
•
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:
Idle 700 to 800 RPM . . . . . . . . . . . . . . . 10 psi (69 kPa)
Full speed and load . . . . . . . . . . . . . . 30 psi (207 kPa)
4
STARTING AND OPERATING 49