2018 Ford Expedition

Reliability tier: verified - see /disclosure/

Engine: 3.5L V6 EcoBoost (Gen2) (Ford EcoBoost, 3.5L)

3.5L EcoBoost twin-turbo V6 (Gen2 tune in the fourth-generation U554 body), 375 hp @ 5,000 / 470 lb-ft @ 3,500. Platinum trim: 400 hp / 480 lb-ft (premium fuel).

Applicable failure modes (9)

• Cam phaser / VCT rattle and cam-timing DTCs
• Cooling service: thermostats, hoses, degas system under tow load
• Internal mechanical failures / long-block decisions
• Low-pressure fuel delivery (in-tank pump / pressure faults)
• High-pressure fuel pump (GDI) failures
• PCV / valve-cover oil consumption (2017-2019 build window)
• Ignition misfires: spark plugs and COP coils
• Turbo / wastegate / boost-control faults
• Internal water pump: coolant loss and coolant-into-oil risk

Applicable parts (17)

• 3.5L EcoBoost Charge Air Cooler, Gen2 (FL3Z-6K775-B)
• 3.5L EcoBoost Charge Air Duct (JL3Z-6C646-A, 2018-2020 F-150 / Expedition / Navigator)
• 3.5L EcoBoost Charge-Tube Outlet Tube, Gen2 (Ford HL3Z-6F073-A)
• Cooling system refill with fresh coolant (service item, all 3.5L EcoBoost applications)
• 3.5L EcoBoost Fuel Pump Controller (Ford HL3Z-9D370-B, 2017-2021 F-150 / Expedition / Navigator)
• In-tank fuel filter service (integral to the pump module, all 3.5L EcoBoost applications)
• Cylinder head / block machining and SSM calibration updates (service item, long-block decisions)
• HPFP failure contamination procedure - flush, rails, injector inspection (service item)
• 3.5L EcoBoost High-Pressure Fuel Pump, Gen2 (current number HL3Z-9350-B)
• 3.5L EcoBoost Ignition Coil, Gen2 (current number HL3Z-12029-D)
• Engine oil and filter change (service item, all 3.5L EcoBoost applications)
• 3.5L EcoBoost Valve Rocker Arm (Ford HL3Z-6564-A, 2017-2020 F-150 / 2018-2019 Expedition-Navigator)
• 3.5L EcoBoost Spark Plug, Gen2 (current number CYFS-12Y-PCTX)
• 3.5L EcoBoost Turbocharger Assy, Gen2 std (pair JL3Z-6K682-C / -D)
• 3.5L EcoBoost Valve Cover, Gen2 (HL3Z-6582-F)
• 3.5L EcoBoost VCT Solenoid (Ford HL3Z-6M280-A, 2017+ applications)
• 3.5L EcoBoost Water Pump, Gen2 (JL3Z-8501-B)

Platform recipes (5)

• CAC-condensation shudder fix: the Gen1 pattern (humid-day single shudder after light-throttle cruising) traces to pooled condensate in the charge-air cooler
• Ignition service for the boost-stressed 3.5L EcoBoost: misfire DTCs first, then plugs and the failed coil(s)
• Cam-phaser rattle / timing-chain service: the cold-start rattle and cam-timing DTCs (P0011/P0015-P0019/P0365/P0369) span generations - Gen2 got formal TSBs (20-2191/20-2166/20-2315) and the 21N08/21B10-S1 PCM-reprogram field actions; Gen1 carries the chain-wear story (TSB 17-0026)
• Turbo / boost-control service: boost DTCs (P0236/P0238/P0299 family) first, hardware second
• Internal water-pump service: the 3.5L EcoBoost carries the pump inside the front cover - a failed seal can send coolant into the oil pan (bearing damage) or leak externally

Recalls that include this truck (1)

• 18V-392 (June 12, 2018) - FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP: Ford Motor Company (Ford) is recalling certain 2018 Ford Expedition, F-150, and Lincoln Navigator vehicles equipped with 3.5L GTDI V6 engines. These vehicles have high pressure fuel pump assemblies with welds that can...

Matched by the model and model year NHTSA lists for each recall - a recall often covers only part of a year's production, so read its text for the build dates and versions it names. Whether a recall is still open on your VIN is not known here; check nhtsa.gov/recalls. All recalls, investigations and bulletins for this engine: /recalls/ford-ecoboost-3_5/

Reference for this truck