2003 Ford Excursion 7.3 F, RWDFACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications

REPLACEMENT INTERVALS

Component (1) Interval - Miles (Normal Schedule) Interval - Miles (Special Operating Conditions)
Gasoline & 7.3L Diesel Engines
Accessory Drive Belt (2) (3)
Air Filter 30,000 (3)
Cabin Air Filter 15,000 (3)
Coolant (4)(5) (3)
Front Axle Fluid (4WD) 150,000 (3)
Front Wheel Bearings
2WD 60,000 30,000
4WD (6) (7)
Fuel Filter 30,000 15,000
NGV Coalescer/Fuel Filter (8) (8)
NGV Fuel Tanks (9) (9)
Oil & Filter 5,000 3,000
PCV Valve (10) (3)
Rear Axle Fluid 150,000 (11)
Spark Plugs 100,000 60,000
Supercharger (12) (12)
Transfer Case Fluid 150,000 60,000
A/T Fluid (13) 30,000
M/T Fluid 60,000 (3)
6.0L Diesel Engine
Accessory Drive Belt 150,000 150,000
Air Filter 30,000 (14)
Cabin Air Filter 15,000 15,000
Coolant (5) 75,000 75,000
Front Axle Fluid (4WD) 150,000 (3)
Front Wheel Bearings
2WD 150,000 90,000
4WD (6) (7)
Fuel Filter 15,000 15,000
Oil & Filter 7,500 5,000
Rear Axle Fluid (15) 97,500 100,000
Transfer Case Fluid 150,000 120,000
A/T Fluid 60,000 30,000
M/T Fluid 60,000 60,000
(1) Applies to vehicles used for towing a trailer, using a camper, or car-top carrier, operated in dusty conditions, off-road operation or with extensive idling and/or low-speed driving for long distances. As in heavy commercial use such as taxi, patrol car or delivery.
(2) Replace at 150,000 miles if not replaced within last 100,000 miles.
(3) If vehicle is driven in dusty conditions or used under special operating conditions, inspect and replace as required.
(4) Green engine coolant replaced at 45,000 miles, and then every 30,000 miles thereafter.
(5) Yellow engine coolant replaced at 5 years or 100,000 miles (which ever comes first). After initial change, replace Yellow coolant every 3 years or 50,000 miles.
(6) Applies to F250-550 Pickup operated under normal conditions. Inspect and lubricate front hub needle bearings every 60,000 miles. Replace as necessary.
(7) Applies to F250-550 Pickup only. If used for towing, inspect and lubricate front hub needle bearings every 30,000 miles. If operated in off-road conditions, inspect and lubricate front hub needle bearings every 15,000 miles. Replace as necessary.
(8) For propane vehicles, drain coalescent fuel filter bowl and replace filter every 30,000 miles. For NGV, drain coalescent fuel filter bowl and replace filter every 25,000 miles.
(9) Fuel tanks for natural gas and propane vehicles, should be inspected every 30,000 miles and natural gas fuel tanks must be replaced every 15 years.
(10) On light-duty Pickups under 6000 GVW, replace every 100,000 miles. On all trucks over 6000 GVW, replace every 120,000 miles.
(11) On Police or Taxi models, or F450-550 Pickup commercial vehicles, replace every 100,000 miles. If operated at or near maximum GVW, in dusty conditions or off-road, replace every 50,000 miles. On all other RWD vehicles without synthetic lubricant and operated under special conditions, replace every 3000 miles or 3 months (which ever comes first).
(12) See SUPERCHARGER  under AIR INDUCTION SYSTEM.
(13) On vehicles equipped with 4R100 transmission, replace at 30,000 miles. On all other vehicles, replace A/T fluid at 150,000 miles.
(14) Inspect air filter every 7,500 miles, replace as necessary.
(15) Dana axles using non-synthetic lubricants only.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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