2006 Lincoln Navigator Owner Guide 2nd Printing - Page 361

Maintenance and Specifications What you should know about fail-safe cooling If the engine coolant supply is depleted, this feature allows the vehicle to be driven temporarily before incremental component damage is incurred. The "fail-safe" distance depends on ambient temperatures, vehicle load and terrain. How fail-safe cooling works If the engine begins to overheat: • The engine coolant temperature gauge will move to the red (hot) area. • The and the will illuminate. symbol indicator light will • The illuminate. • CHECK ENGINE TEMPERATURE will illuminate in the message center. If the engine reaches a preset over-temperature condition, the engine will automatically switch to alternating cylinder operation. Each disabled cylinder acts as an air pump and cools the engine. When this occurs the vehicle will still operate. However: • The engine power will be limited. • The air conditioning system will be disabled. • Warning messages will appear in the message center. Continued operation will increase the engine temperature: • The engine will completely shut down. • Steering and braking effort will increase. Once the engine temperature cools, the engine can be re-started. Take your vehicle to an authorized dealer as soon as possible to minimize engine damage. When fail-safe mode is activated You have limited engine power when in the fail-safe mode, so drive the vehicle with caution. The vehicle will not be able to maintain high speed operation and the engine will run rough. Remember that the engine is capable of completely shutting down automatically to prevent engine damage, therefore: 361 2006 Navigator (nav) Owners Guide (post-2002-fmt) USA (fus)