•
when the ambient temperature remains below
-22°F (-30°C) and the engine is unable to
maintain a running coolant temperature of
175°F (80°C) during normal over-the-road op-
eration.
Engine Shutdown
1.
With the vehicle stopped, apply the parking
brakes and place the transmission in neutral.
NOTICE
Idle the engine one to two minutes before shut-
ting it down. After hard operation, shutting down
the engine without idling may cause damage to
the turbocharger.
2.
Allow the engine to idle one to two minutes be-
fore shutting it down. This allows the lubricating
oil and the coolant to carry heat away from the
combustion chambers, bearings, shafts, and
seals. The extreme heat may cause bearings to
seize or oil seals to leak.
IMPORTANT: Bearings and seals in the turbo-
charger are subjected to the high heat of com-
bustion exhaust gases. While the engine is run-
ning, this heat is carried away by oil circulation,
but if the engine is stopped suddenly, the turbo-
charger temperature may rise as much as 115°F
(46°C).
NOTICE
Except in an emergency, do not shut down the
engine when the coolant temperature is above
194°F (90°C). To do so could damage the engine.
3.
Turn off the ignition switch and shut down the
engine.
Engine Starting, Operation, and Shutdown
9.4
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