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To be sure the engine can turn fast enough to start, use SAE 10W-
40 viscosity engine oil when prevailing temperatures drop below 32°F
(0°C). (See the oil quality and oil viscosity recommendations in Section
5 ) Using your proper viscosity oil will make starting easier down to
–10°F (–23°C). When prevailing temperatures drop below –10° F
(–23°C), the optional engine block heater may be needed for starting.
ENGINE WARM-UP SYSTEM
During cold ambient conditions, the automatic engine warm-up system
operates to reduce engine warm-up time during idling.
AUTOMATIC ENGINE WARM-UP
When the engine is idling with the engine coolant temperature below
144°F (62°C), the engine warm-up system automatically closes the
exhaust brake and increases engine idle speed so that the engine is
warmed more quickly. Warm-up is cancelled when the accelerator
pedal is depressed, and resumed when the pedal is released. Warm-
u p i s a u t o m a t i c a l l y c a n c e l l e d e n t i r e l y a f t e r t h e e n g i n e c o o l a n t
temperature rises above 149°F (65°C).
ENGINE BLOCK AND OIL PAN HEATER (IF EQUIPPED)
If the vehicle is parked in a garage, the block and pan heaters should
not be needed until the garage temperature drops below –10°F
(–23°C) regardless of outside temperature.
The engine block and oil pan heaters are designed to warm the block
and oil pan areas that will let the engine run faster. To use the heaters:
1. Tilt the cab (See Section 5).
2. Unwrap the electrical cord and remove the protective cap.
3. P l u g t h e c o r d i n t o a n y t h r e e - p r o n g 1 1 0 v o l t o u t l e t ( n o r m a l
household current). It may require several hours to sufficiently
heat the engine.
Outside temperature, oil viscosity, etc., will affect how long the
block and oil pan heater should remain plugged in. Contact your
dealer for the conditions in your area.
4. After using the heater(s), be sure to restore the cord properly, to
help keep it away from moving engine parts.
NOTICE: If the cord is too short, use a heavy duty, three-prong
extension cord. Do not use an extension cord such as you would
use for a lamp, because the cord may overheat.
The engine should go through a warm-up period to warm up the
engine oil before placing engine under load. This will ensure proper
lubrication of the engine.
NOTICE: Do not use starting “aids” in the air intake system. Such
“aids” can cause immediate engine damage.
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