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• Do not install chains on the front wheels. Chains on the front wheels
may interfere with suspension components.
• Chains are not recommended for use on the optional P275/65R18 tire.
• Install chains securely, verifying that the chains do not touch any
wiring, brake lines or fuel lines.
• Drive cautiously. If you hear the chains rub or bang against your
vehicle, stop and re-tighten the chains. If this does not work, remove
the chains to prevent damage to your vehicle.
• If possible, avoid fully loading your vehicle.
• Remove the tire chains when they are no longer needed. Do not use
tire chains on dry roads.
• The suspension insulation and bumpers will help prevent vehicle
damage. Do not remove these components from your vehicle when
using snow tires and chains.
• Do not exceed 48 km/h (30 mph) with tire chains on your vehicle.
MOTORCRAFT PART NUMBERS
Component
Air filter element
Battery (standard)
Fuel filter
Oil filter
PCV valve
Spark plugs*
* Refer to Vehicle Emissions Control Information (VECI) decal for spark
plug gap information.
2003 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)
Maintenance and Specifications
5.4L 4V V8 engine
FA-1634
BXT-65-650/BXT-65–750
FG-986B
FL-820-S
EV-248
AWSF-32PM
337
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