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Ford EcoBoost (3.5L Cyclone / D35 twin-turbo V6) platform

Ford 3.5L EcoBoost Gasoline (F-150, Expedition, Transit, Raptor - 2011-present)

2011-2026 · 3.5L · Ford Motor Company

62
vehicle configs
11
failure modes
55
parts
5
recipes
8 + 20
recalls + bulletins →
7
symptoms compared →
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Failure modes

Charge-air-cooler condensation: boost shudder / hesitation in humid weather
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
Timing chain stretch / guide wear (Gen1 era)
Turbo / wastegate / boost-control faults
Internal water pump: coolant loss and coolant-into-oil risk

Parts

3.5L EcoBoost CAC Air Deflector (CL3Z-19E672-A) part-eb35-cac-deflector-19e672a 3.5L EcoBoost CAC Air Deflector (BL3Z-19E672-A) part-eb35-cac-deflector-19e672b 3.5L EcoBoost Charge Air Cooler, Gen1 (DL3Z-6K775-B) part-eb35-cac-g1 3.5L EcoBoost Charge Air Cooler, Gen2 (FL3Z-6K775-B) part-eb35-cac-g2 3.5L EcoBoost Cam Phaser / Timing Actuator (AT4Z-6256-B) part-eb35-cam-phaser-actuator 3.5L EcoBoost Charge Air Duct (BL3Z-6C646-A, 2011-2014 F-150 / 2015-2017 Expedition-Navigator) part-eb35-charge-duct-g1 3.5L EcoBoost Charge Air Duct (JL3Z-6C646-A, 2018-2020 F-150 / Expedition / Navigator) part-eb35-charge-duct-g2 3.5L EcoBoost Intercooler Outlet Tube, cold side (BL3Z-6F073-A, 2011-2014 F-150 / 2015-2017 Expedition-Navigator) part-eb35-charge-tube-outlet-g1 3.5L EcoBoost Charge-Tube Outlet Tube, Gen2 (Ford HL3Z-6F073-A) part-eb35-charge-tube-outlet-g2 3.5L EcoBoost Coolant Tube Assembly (Ford BL3Z-8K153-AB, 2011-2016 F-150 / Transit 2015-2019) part-eb35-cool-tube-bl3z Cooling system refill with fresh coolant (service item, all 3.5L EcoBoost applications) part-eb35-coolant-service 3.5L EcoBoost Service Engine Assy / Long Block, Gen1 (DL3Z-6006-ARM) part-eb35-engine-long-block-g1 3.5L EcoBoost Fuel Pump Controller (Ford HL3Z-9D370-B, 2017-2021 F-150 / Expedition / Navigator) part-eb35-fscm-hl3z In-tank fuel filter service (integral to the pump module, all 3.5L EcoBoost applications) part-eb35-fuel-filter-service 3.5L EcoBoost GDI Injector, Gen1 (BL3Z-9F593-B) part-eb35-fuel-injector-g1 3.5L EcoBoost Fuel Pump Control Unit, wiring-correction part (Ford GA8Z-9D370-A) part-eb35-fuel-pump-relay-ga8z Cylinder head / block machining and SSM calibration updates (service item, long-block decisions) part-eb35-head-service HPFP failure contamination procedure - flush, rails, injector inspection (service item) part-eb35-hpfp-contamination-service 3.5L EcoBoost High-Pressure Fuel Pump, Gen1 (current number BL3Z-9350-D) part-eb35-hpfp-g1 3.5L EcoBoost High-Pressure Fuel Pump, Gen2 (current number HL3Z-9350-B) part-eb35-hpfp-g2 3.5L EcoBoost Ignition Coil, Gen1 (BL3Z-12029-C) part-eb35-ignition-coil-g1 3.5L EcoBoost Ignition Coil, Gen2 (current number HL3Z-12029-D) part-eb35-ignition-coil-g2 3.5L EcoBoost Ignition Coil, Gen3 (ML3Z-12029-C) part-eb35-ignition-coil-g3 3.5L EcoBoost In-Tank Fuel Pump Module, Gen1 (Ford CL3Z-9H307-A 2WD / DL3Z-9H307-A 4WD) part-eb35-intank-module-g1 3.5L EcoBoost In-Tank Fuel Pump Module, Gen2 (Ford HL3Z-9H307-E, supersedes -A) part-eb35-intank-module-g2 KC Turbos Upgraded Intercooler, all-aluminum bar-and-plate (3.5L EcoBoost F-150 2015-2024) part-eb35-intercooler-kc Engine oil and filter change (service item, all 3.5L EcoBoost applications) part-eb35-oil-system-service 3.5L EcoBoost PCV Valve, Gen1 (BL3Z-6A666-AA) part-eb35-pcv-valve-g1 3.5L EcoBoost Valve Rocker Arm (Ford HL3Z-6564-A, 2017-2020 F-150 / 2018-2019 Expedition-Navigator) part-eb35-rocker-arm-hl3z 3.5L EcoBoost Spark Plug, Gen1 (current number CYFS-12-YT4X) part-eb35-spark-plug-g1 3.5L EcoBoost Spark Plug, Gen2 (current number CYFS-12Y-PCTX) part-eb35-spark-plug-g2 3.5L EcoBoost Spark Plug, Gen3 (DYFS-12Y-PT) part-eb35-spark-plug-g3 3.5L EcoBoost Thermostat, Gen1-Gen2 (BL3Z-8575-B) part-eb35-thermostat-g1 3.5L EcoBoost Thermostat, Gen3 (ML3Z-8575-A) part-eb35-thermostat-g3 3.5L EcoBoost Thermostat Housing / Water Outlet, Gen1-Gen2 (BL3Z-8A586-G) part-eb35-thermostat-housing-g1 3.5L EcoBoost Thermostat Housing / Water Outlet, Gen3 (ML3Z-8A586-C) part-eb35-thermostat-housing-g3 3.5L EcoBoost Timing Chain (AT4Z-6268-C) part-eb35-timing-chain 3.5L EcoBoost Timing Chain Guide (AT4Z-6B274-A) part-eb35-timing-chain-guide 3.5L EcoBoost Timing Chain Tensioner (BL3Z-6L266-A) part-eb35-timing-tensioner 3.5L EcoBoost Turbocharger Assy, Gen1 (pair DL3Z-6K682-E / -F) part-eb35-turbo-g1 3.5L EcoBoost Turbocharger Assy, Gen2 std (pair JL3Z-6K682-C / -D) part-eb35-turbo-g2 3.5L EcoBoost Gen2 Turbocharger MY2017 (HL3Z family) part-eb35-turbo-g2-2017-hl3z 3.5L EcoBoost Gen2 Turbocharger MY2017 (HL7Z family) part-eb35-turbo-g2-2017-hl7z 3.5L EcoBoost Turbocharger Assy, Gen3 (pair ML3Z-6K682-C / -D) part-eb35-turbo-g3 3.5L EcoBoost Turbocharger Assy, Gen2 high-output (JL7Z-6K682-A) part-eb35-turbo-ho-g2 3.5L EcoBoost Turbo Control Solenoid, Gen1 (BL3Z-9K378-A) part-eb35-turbo-wastegate-solenoid-g1 3.5L EcoBoost Valve Cover (BL3Z-6582-H, other side) part-eb35-valve-cover-bl3z 3.5L EcoBoost Valve Cover (DL3Z-6582-C, one side) part-eb35-valve-cover-dl3z 3.5L EcoBoost Valve Cover, Gen2 (HL3Z-6582-F) part-eb35-valve-cover-g2 3.5L EcoBoost Valve Cover Gasket, Gen1 (pair BL3Z-6584-A / DL3Z-6584-B) part-eb35-valve-cover-gasket-g1 3.5L EcoBoost VCT Solenoid (Ford AT4Z-6M280-A / -B, one per intake/exhaust position; four per engine) part-eb35-vct-solenoid-at4z 3.5L EcoBoost VCT Solenoid (Ford HL3Z-6M280-A, 2017+ applications) part-eb35-vct-solenoid-hl3z 3.5L EcoBoost Water Pump, Gen1 (current number ER3Z-8501-C) part-eb35-water-pump-g1 3.5L EcoBoost Water Pump, Gen2 (JL3Z-8501-B) part-eb35-water-pump-g2 3.5L EcoBoost Water Pump, Gen3 (ML3Z-8501-C) part-eb35-water-pump-g3

Recipes

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

From the blog

Quick answerFord 3.5L EcoBoost Gasoline

3.5 EcoBoost Rattle on Cold Start: Cam Phasers or Timing Chain?

· 3 min read

Vehicle configurations