2007 Jeep Grand Cherokee Owner's Manual - Page 251

STARTING AND OPERATING 251 Starting and Operating Cautions - Diesel Engines WARNING! NEVER pour fuel or other flammable liquid into the air inlet opening in an attempt to start the vehicle. This could result in a flash fire causing serious personal injury. • Running a cold engine at high speeds during driving or idling may damage engine components. • Before turning off your turbo diesel engine, always allow the engine to return to normal idle speed and run for several seconds. This assures proper lubrication of the turbocharger. This is particularly necessary after any period of hard driving. Turbocharger "Cool Down" NOTE: Letting the engine idle after extended operation allows the turbine housing to cool to normal operating temperature. The following chart should be used as a guide in determining the amount of engine idle time required to sufficiently cool down the turbocharger before shut down, depending upon the type of driving and the amount of cargo. 5