Engine Operation - Except 4.5L Engines Warming Engine The electronically-controlled engines will operate at an accelerated slow idle of 1050 rpm until the engine coolant warms up to 20 ° C (68 ° F). IMPORTANT: To assure proper lubrication, operate engine at or below 1200 rpm with no load for minutes. Extend this period minutes when operating at temperatures below freezing. Engines used in generator set applications where the governor is locked at a specified speed may not have a slow idle function. Operate these engines at high idle for 1 to 2 minutes before applying the load.
This procedure does not apply to standby generator sets where the engine is loaded immediately upon reaching rated speed. RG13281 –UN–30OCT03 Oil Pressure and Coolant Temperature Gauges On Earlier Panel (Left) or Later Panel (Right) 1. Check oil pressure gauge (A) as soon as engine starts. If gauge needle does not rise above minimum oil pressure specification of 105 kPa (1.05 bar) (15.0 psi) within 5 seconds, stop the engine and determine the cause. Normal engine oil pressure is 345 ± 103 kPa (3.45 ± 1.03 bar) (50 ± 15 psi) at rated full load speed (1800–2500 rpm) with oil at normal operating temperature of 115 ° C (240 ° F).
A—Engine Oil Pressure Gauge B—Engine Coolant Temperature Gauge NOTE: On certain engines, the oil pressure and coolant temperature gauges are replaced by indicator warning lights. The lights must be "OFF" when engine is running. 2. Watch coolant temperature gauge (B). Do not place engine under full load until it is properly warmed up. The normal engine coolant temperature range is 82 ° 94 ° C (180 ° —202 ° F). NOTE: It is a good practice to operate the engine under a lighter load and at lower speeds than normal for the first few minutes after start-up. OURGP11,0000137 –19–20NOV03–1/1 19-8 021604 PN=106