2002 Lincoln Navigator Owner Guide 1st Printing - Page 225

Maintenance and specifications 5. Turn the A/C on and allow the engine to idle for at least one minute. 6. With your foot on the brake pedal and with the A/C on, put the vehicle in D (Drive) and allow the engine to idle for at least one minute. 7. Drive the vehicle to complete the relearning process. • The vehicle may need to be driven 16 km (10 miles) or more to relearn the idle and fuel trim strategy. • If you do not allow the engine to relearn its idle trim, the idle quality of your vehicle may be adversely affected until the idle trim is eventually relearned. If the battery has been disconnected or a new battery has been installed, the clock must be reset once the battery is reconnected. • Always dispose of automotive batteries in a responsible manner. Follow your local authorized standards for disposal. Call your local authorized recycling center to find out more about recycling automotive batteries. R TU RE LE AD N RECYCLE ENGINE COOLANT Checking engine coolant The concentration and level of engine coolant should be checked at the mileage intervals listed in the scheduled maintenance guide. The coolant concentration should be maintained at 50/50 coolant and water, which equates to a freeze point of -36° C (-34° F). Coolant concentration testing is possible with a hydrometer or antifreeze tester (such as the Rotunda Battery and Antifreeze Tester, 014-R1060). The level of coolant should be maintained at the "cold full" of "cold fill range" level in the coolant reservoir. If the level falls below, add coolant per the instructions in the Adding Engine Coolant section. 225