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STARTING AND OPERATING 137
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.
The engine block heater cord is routed behind the
front bumper and accessible through the right hole of
the air dam.
The engine block heater must be plugged in at least one
hour to have an adequate warming effect on the engine.
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.
NOTE:
The block heater will require 110 Volt AC and 6.5 Amps to
activate the heater element.
Block Heater Usage
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.
ENGINE BREAK-IN RECOMMENDATIONS —
GASOLINE ENGINE
A long break-in period is not required for the engine and
drivetrain (transmission and axle) in your vehicle.
Drive moderately during the first 300 miles (500 km).
After the initial 60 miles (100 km), speeds up to 50 or
55 mph (80 or 90 km/h) are desirable.
While cruising, brief full-throttle acceleration within the
limits of local traffic laws contributes to a good break-in.
Wide-open throttle acceleration in low gear can be
detrimental and should be avoided.
The engine oil installed in the engine at the factory is a
high-quality energy conserving type lubricant. Oil changes
should be consistent with anticipated climate conditions
under which vehicle operations will occur. For the
recommended viscosity and quality grades
Ú page 446.
NOTE:
A new engine may consume some oil during its first few
thousand miles (kilometers) of operation. This should be
considered a normal part of the break-in and not inter-
preted as a problem. Please check your oil level with the
engine oil indicator often during the break in period. Add
oil as required.
ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE
The Cummins® Turbo Diesel engine does not require a
break-in period due to its construction. Normal operation
is allowed, providing the following recommendations are
followed:
Warm up the engine before placing it under load.
Do not operate the engine at idle for prolonged periods.
Use the appropriate transmission gear to prevent
engine lugging.
Observe vehicle oil pressure and temperature indica-
tors.
Check the coolant and oil levels frequently.
Vary throttle position at highway speeds when carrying
or towing significant weight.
NOTE:
Light duty operation such as light trailer towing or no load
operation will extend the time before the engine is at full
efficiency. Reduced fuel economy and power may be seen
at this time.
For additional vehicle break-in requirements
Ú page 212.
Because of the construction of the Cummins® Turbo
Diesel engine, engine run-in is enhanced by loaded
operating conditions which allow the engine parts to
achieve final finish and fit during the first 6,000 miles
(10,000 km).
CAUTION!
Never use Non-Detergent Oil or Straight Mineral Oil in
the engine or damage may result.
4
23_DJD2_OM_EN_USC_t.book Page 137
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