136 STARTING AND OPERATING
Engine Warm-Up
Avoid full throttle operation when the engine is
cold. When starting a cold engine, bring the engine
up to operating speed slowly to allow the oil
pressure to stabilize as the engine warms up.
If temperatures are below 32°F (0°C), operate the
engi
ne at moderate speeds for five minutes before
full loads are applied.
ENGINE IDLING
Avoid prolonged idling, long periods of idling may
be harmful to your engine because combustion
chamber temperatures can drop so low that the
fuel may not burn completely. Incomplete
combustion allows carbon and varnish to form on
piston rings, cylinder head valves, and injector
nozzles. Also, the unburned fuel can enter the
crankcase, diluting the oil and causing rapid wear
to the engine.
STOPPING THE ENGINE
After full load operation, idle the engine for a few
minutes before shutting it down. This idle period
will allow the lubricating oil and coolant to carry
excess heat away from the turbocharger. Refer to
the following chart for proper engine shutdown.
NOTE:
Under certain conditions the engine fan will run
afte
r the engine is turned off. These conditions are
under high load and high temperature conditions.
Do Not Operate The Engine With Low Oil
Pressure
If the low oil pressure warning light turns on while
driving, stop the vehicle and shut down the engine
as soon as possible. A chime will sound when the
light turns on.
NOTE:
Do not operate the vehicle until the cause is
corre
cted. This light does not show how much oil is
in the engine. The engine oil level must be checked
under the hood.
Driving Condition Load Tu rbocharger Temperature
Idl e Time (min.) Before Engine
Shu
tdown
Stop and Go Empty Cool None
Stop and Go Medium 0.5
Highway Speeds Medium Warm 1.0
City Traffic Maximum GCWR 1.5
Highway Speeds Maximum GCWR 2.0
Uphill Grade Maximum GCWR Hot 2.5
CAUTION!
If oil pressure falls to less than normal readings,
shut the engine off immediately. Failure to do so
could result in immediate and severe engine
damage.
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