Engine Operation- 4.5 L Engines Normal Engine Operation 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.) RG13343 –UN–24NOV03 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.
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 Instrument Panel (Earlier 4.5 L Engines) RG13359 –UN–06FEB04 Instrument Panel (Later 4.5 L Engines) OURGP11,000027D –19–25NOV03–1/1 20-1 021604 PN=116