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Engine Operation- 4.5 L “270” Engines
OURGP11,000007A –19–27JUL06–1/1
Normal Engine Operation
RG13343 –UN–24NOV03
Instrument Panel (Earlier 4.5 L “270” Engines)
RG13359 –UN–06FEB04
Instrument Panel (Later 4.5 L “270” Engines)
Before starting, fill engine with oil and coolant meeting
specifications. (See DIESEL ENGINE BREAK-IN OIL and
DIESEL ENGINE COOLANT SPECIFICATIONS in Fuels,
Lubricants, and Coolant section.)
• Observe engine coolant temperature and engine oil
pressure. Temperatures and pressures will vary
between engines and with changing operating
conditions, temperatures, and loads.
• Normal engine coolant operating temperature range is
90° – 100° C (194° – 212° F). If coolant temperature
rises above 105° C (221° F), reduce load on engine.
Unless temperature drops quickly, stop engine and
determine cause before resuming operation.
• Engine oil pressure should be at least 103 kPa (1.03
bar) (15 psi) at slow idle and should reach at least 241
kPa (2.41 bar) (35 psi) at rated speed under full load.
• Operate the engine under a lighter load and at slower
than normal speed for first 15 minutes after start-up. DO
NOT run engine at slow idle.
• Stop engine immediately if there are any signs of part
failure. Symptoms that may be early signs of engine
problems are:
– Sudden drop in oil pressure
– Abnormal coolant temperatures
– Unusual noise or vibration
– Sudden loss of power
– Excessive black exhaust
– Excessive fuel consumption
– Excessive oil consumption
– Fluid leaks
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PN=116