Complete 100,000-mile service for 2015-2020 Ford F-150 with 5.0L Coyote V8, including fluid changes, filter replacements, spark plugs, and comprehensive inspection.

Warnings

Tools required

Parts

• Engine oil filter × 1 — Motorcraft FL-820-S or equivalent
• Engine air filter × 1 — Motorcraft FA-1927 or equivalent
• Cabin air filter × 1 — Motorcraft FP-67 or equivalent
• Spark plugs (8 required) × 8 — Motorcraft SP-534 (Iridium, pre-gapped 0.051-0.057")
• Oil drain plug crush washer × 1 — Use OEM specification
• Rear differential drain plug gasket × 1 — Use OEM specification
• Rear differential fill plug gasket × 1 — Use OEM specification

Fluids

• Motorcraft 0W-20 Full Synthetic Engine Oil — 7.5 qt
• Motorcraft MERCON LV ATF — 11 qt
• Motorcraft 75W-140 Synthetic Gear Oil — 2 qt
• Motorcraft Orange Coolant — 16 qt
• Motorcraft DOT 4 LV Brake Fluid — 1 qt

Preparation

1. Park vehicle on level ground and engage parking brake
2. Allow engine to cool completely (minimum 2 hours if recently driven)
3. Gather all required parts, fluids, and tools before beginning
4. Raise vehicle safely using floor jack and support on jack stands at all four corners
5. Remove all four wheels and set aside for access to brake components during inspection
6. Place drain pans and shop towels in work area

Procedure

1. 1

   Engine Oil and Filter Change
   Locate the oil drain plug on the passenger side of the oil pan. Place drain pan underneath and remove drain plug, allowing oil to drain completely (approximately 10 minutes). Remove old crush washer from drain plug and install new one. Clean drain plug threads and oil pan surface. Reinstall drain plug and torque to specification. Move drain pan under oil filter (located on driver side of engine block). Use oil filter wrench to remove old filter, ensuring old gasket comes off with filter. Clean filter mounting surface on block. Apply thin film of clean engine oil to new filter gasket. Install new filter hand-tight, then turn an additional 3/4 turn. Fill engine with 7.5 quarts of Motorcraft 0W-20 synthetic oil through oil filler cap. Start engine and verify no leaks, then shut off and check oil level after 2 minutes.
2. 2

   Replace Engine Air Filter
   Open hood and locate air filter housing on driver side of engine bay. Release the spring clips or screws securing the air box cover (4 total). Lift cover and remove old air filter element. Inspect air box for debris and clean if necessary. Install new Motorcraft FA-1927 air filter, ensuring proper seating in housing. Reinstall air box cover and secure all clips or screws.
3. 3

   Replace Cabin Air Filter
   Open passenger door and locate cabin air filter access door behind glove box. Remove glove box stop arms by squeezing sides and lowering glove box fully. Locate filter door on HVAC housing, press release tabs and remove cover. Slide out old cabin air filter, noting airflow direction arrow. Install new Motorcraft FP-67 filter with airflow arrow pointing toward rear of vehicle. Reinstall filter door and glove box stops.
4. 4

   Replace Spark Plugs
   Remove engine cover by pulling upward on front clips and lifting off. Locate all 8 coil-on-plug ignition coils (4 per cylinder bank). Disconnect electrical connector from each coil by pressing release tab. Remove single bolt securing each coil and gently twist while pulling upward to remove. Use compressed air to clean debris from spark plug wells before removal. Using spark plug socket with extension, carefully remove each spark plug by turning counterclockwise. Verify new Motorcraft SP-534 plugs are gapped to 0.051-0.057" specification. Apply small amount of anti-seize to plug threads (avoid electrode area). Thread each new plug BY HAND to ensure proper alignment and prevent cross-threading. Once hand-tight, use torque wrench to tighten to 12 lb-ft (16 Nm). Reinstall ignition coils, ensuring they seat fully into plug boots. Reconnect all electrical connectors and reinstall engine cover.
   ⚠Thread spark plugs by hand first. Using a wrench or socket before hand-threading risks cross-threading aluminum heads, causing damage requiring head removal.
5. 5

   Drain and Refill Rear Differential
   Locate rear differential under vehicle between rear wheels. Clean area around both drain plug (bottom) and fill plug (on cover or housing side) before removal. Remove fill plug FIRST using appropriate socket - if plug is seized, stop and address before draining. Remove drain plug and allow gear oil to drain into pan (approximately 2 quarts). Inspect drained fluid for metal particles or unusual debris. Install new drain plug gasket and reinstall drain plug, torquing to specification. Using fluid transfer pump, add Motorcraft 75W-140 synthetic gear oil through fill hole until fluid begins to seep out of fill opening. Install new fill plug gasket and reinstall fill plug, torquing to specification.
   ℹ️Always remove fill plug before drain plug to ensure you can refill the differential. A seized fill plug with drained fluid requires towing to a shop.
6. 6

   Automatic Transmission Fluid Service
   Start engine and allow transmission fluid to reach operating temperature (160-180°F), then shut off. Locate transmission fluid drain plug on bottom of transmission pan. Place large drain pan underneath and remove drain plug, allowing fluid to drain (may take 15-20 minutes to drain fully). Reinstall drain plug with new washer if equipped and torque to specification. Locate transmission fill plug on driver side of transmission case. Remove fill plug. Using fluid transfer pump and long hose, add MERCON LV ATF through fill hole. Add approximately 5-6 quarts initially. Start engine with foot on brake and shift through all gear positions, pausing 2-3 seconds in each. Return to Park and with engine running, continue adding fluid until it begins to drip slowly from fill hole (approximately 1-2 drops per second). Install fill plug while engine is running, then shut off engine.
   ⚠Transmission fluid level must be checked with engine running and transmission at operating temperature. Incorrect fluid level can cause shifting problems or transmission damage.
7. 7

   Coolant System Service and Inspection
   Ensure engine is completely cold. Place large drain pan under radiator. Locate radiator drain petcock on bottom driver side of radiator and open to drain coolant. Remove radiator cap only after confirming system is cool. Once drained, close petcock and inspect all coolant hoses for cracks, soft spots, or leaks. Check coolant reservoir for cracks. Using 50/50 premix of Motorcraft Orange coolant, fill cooling system through radiator opening until full. Fill coolant reservoir to COLD MAX line. Install radiator cap. Start engine with cap on and allow to reach operating temperature while monitoring for leaks. After engine reaches temperature, shut off and allow to cool. Recheck coolant level when cold and top off reservoir if needed.
   ⚠️Never open radiator cap on hot engine. Pressurized coolant can erupt causing severe burns. System must be completely cool.
8. 8

   Brake Fluid Replacement
   Locate brake fluid reservoir under hood (driver side near firewall). Using turkey baster or fluid evacuator, remove old fluid from reservoir until nearly empty (do not allow to run completely dry). Refill with fresh Motorcraft DOT 4 LV brake fluid to MAX line. Starting with right rear wheel, locate bleeder valve on brake caliper. Attach clear hose to bleeder and place other end in container. Have assistant apply steady brake pedal pressure. Open bleeder valve, allow old dark fluid to flow until fresh light-colored fluid appears, then close bleeder before pedal reaches floor. Repeat for left rear, right front, then left front. After each wheel, check and refill master cylinder reservoir to prevent air entry. Final fluid should be clean and light colored throughout system.
   ⚠Never allow brake fluid reservoir to run empty during bleeding process. Air in the system will require extensive bleeding and may compromise brake performance.
   ℹ️DOT 4 brake fluid absorbs moisture over time, reducing boiling point and brake performance. Replacement at 100K miles is preventive maintenance.
9. 9

   Comprehensive Inspection
   With vehicle raised and wheels removed, perform thorough inspection: Check brake pads for remaining thickness (replace if less than 3mm). Inspect brake rotors for scoring, cracks, or excessive wear. Check all brake lines and hoses for leaks, cracks, or damage. Inspect all CV boots and driveshaft boots for tears or grease leakage. Check suspension components including ball joints, tie rod ends, and control arm bushings for play or wear. Inspect exhaust system for leaks, rust, or loose hangers. Check battery terminals for corrosion and verify secure connections. Test battery voltage (should be 12.4V or higher at rest). Inspect serpentine belt for cracks, glazing, or fraying (measure tension if gauge available). Check all fluid levels and inspect for leaks around engine, transmission, and differential.
10. 10

    Reinstall Wheels and Final Checks
    Clean wheel mounting surfaces on hubs and inside wheels to ensure proper seating. Install wheels onto hubs, threading lug nuts by hand first. Using torque wrench, tighten lug nuts in star pattern to specification in three stages: first to 50 Nm, then 100 Nm, then final 140 Nm. Lower vehicle from jack stands and perform final torque check with vehicle on ground. Test drive vehicle for 10-15 minutes, monitoring for unusual noises, vibrations, or warning lights. After test drive, recheck all fluid levels and inspect underneath for any leaks.

Reassembly

1. Ensure all drain plugs and fill plugs are properly torqued with new gaskets/washers where specified
2. Verify all electrical connectors on ignition coils are fully seated and locked
3. Confirm engine cover is properly installed with all clips secured
4. Double-check that all tools and rags are removed from engine bay and under vehicle
5. Verify wheels are torqued to specification in star pattern after vehicle is lowered

Verification

• Start engine and verify no warning lights on dashboard. Check for any unusual noises or vibrations
• Verify no fluid leaks underneath vehicle after running engine to operating temperature
• Confirm all fluid levels are correct: engine oil on dipstick between MIN and MAX, coolant reservoir at COLD MAX, brake fluid at MAX line
• Test drive vehicle and verify smooth operation, proper shifting, normal engine temperature, and effective braking
• After test drive, perform final inspection underneath for any leaks and recheck all fluid levels
• Reset oil life monitor through vehicle settings if equipped
• Document all services performed and record mileage for future maintenance scheduling

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