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2017 Ford Transit

Reliability tier: verified - see /disclosure/

Engine: 3.5L V6 EcoBoost (van tune) (Ford EcoBoost, 3.5L)

Derated van calibration of the 3.5L EcoBoost: 310 hp / 400 lb-ft across the run (strong low-end tune for load hauling, not the truck rating). T-150/T-250/T-350 nomenclature; EcoBoost availability by GVW varies by model year - confirm by VIN before ordering parts. The 3.7L (2015-2019) and 3.5L PFDi non-turbo (2020+) V6s and the diesels are separate engines - out of scope here.

Applicable failure modes (7)

• 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)
• Ignition misfires: spark plugs and COP coils
• Turbo / wastegate / boost-control faults
• Internal water pump: coolant loss and coolant-into-oil risk

Applicable parts (19)

• 3.5L EcoBoost Cam Phaser / Timing Actuator (AT4Z-6256-B)
• 3.5L EcoBoost Coolant Tube Assembly (Ford BL3Z-8K153-AB, 2011-2016 F-150 / Transit 2015-2019)
• Cooling system refill with fresh coolant (service item, all 3.5L EcoBoost applications)
• In-tank fuel filter service (integral to the pump module, all 3.5L EcoBoost applications)
• 3.5L EcoBoost GDI Injector, Gen1 (BL3Z-9F593-B)
• 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, Gen1 (current number BL3Z-9350-D)
• 3.5L EcoBoost Ignition Coil, Gen1 (BL3Z-12029-C)
• Engine oil and filter change (service item, all 3.5L EcoBoost applications)
• 3.5L EcoBoost Spark Plug, Gen1 (current number CYFS-12-YT4X)
• 3.5L EcoBoost Thermostat, Gen1-Gen2 (BL3Z-8575-B)
• 3.5L EcoBoost Thermostat Housing / Water Outlet, Gen1-Gen2 (BL3Z-8A586-G)
• 3.5L EcoBoost Timing Chain Guide (AT4Z-6B274-A)
• 3.5L EcoBoost Turbocharger Assy, Gen1 (pair DL3Z-6K682-E / -F)
• 3.5L EcoBoost Valve Cover (BL3Z-6582-H, other side)
• 3.5L EcoBoost Valve Cover (DL3Z-6582-C, one side)
• 3.5L EcoBoost Valve Cover Gasket, Gen1 (pair BL3Z-6584-A / DL3Z-6584-B)
• 3.5L EcoBoost Water Pump, Gen1 (current number ER3Z-8501-C)

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