6.4 Powerstroke Engine for Sale | OEM Used Ford / Navistar 6.4L V8 Turbo Diesel Produced 2008 to 2010 for Ford F-250, F-350, F-450

Description

About the 6.4 Powerstroke Engine

Are you searching for a used 6.4 Powerstroke engine for your 2008 to 2010 Ford Super Duty? You have come to the right place for honest information about this engine. The Ford / Navistar 6.4L Powerstroke is a powerful V8 turbo diesel producing 350 HP and 650 lb-ft of torque, with a compound turbocharger setup that delivers strong power across the RPM range. However, the 6.4 Powerstroke has well-documented reliability concerns that any potential buyer should understand before making a purchase decision. At Part Nests we believe in honest disclosure: this page tells you both what is good about the 6.4 Powerstroke and what to watch for. Our goal is to help you make an informed decision so you get the right outcome for your truck.

6.4 Powerstroke Engine Overview

The 6.4 Powerstroke is a 6.4 liter V8 turbocharged diesel engine produced by International Truck and Engine Corporation (Navistar) for Ford Motor Company from 2008 through 2010 model years. It was the successor to the troubled 6.0L Powerstroke (2003 to 2007) and was itself replaced by the much-improved in-house Ford 6.7L Powerstroke for the 2011 model year. The 6.4 was the last Navistar-built Powerstroke engine: after the documented reliability problems with both the 6.0L and 6.4L, Ford terminated its long-running partnership with Navistar (which had supplied Powerstroke diesels since 1994) and began designing the 6.7L Powerstroke in-house. The 6.4 Powerstroke is closely related to the International MaxxForce 7 used in non-Ford commercial truck applications.

Honest Disclosure: What You Need to Know Before Buying a 6.4 Powerstroke

Before discussing the engine specifications and features, we want to be upfront about the 6.4 Powerstroke reputation in the diesel community. The 6.4 Powerstroke has documented reliability concerns that are widely known among Ford Super Duty enthusiasts and diesel technicians. Common failure modes include:

• Catastrophic Piston Cracking, especially in cylinders #2 and #7. The pistons can develop cracks that lead to coolant intrusion and complete engine failure.
• Dual EGR Cooler Failures, both EGR coolers (the 6.4 has two) commonly crack and leak coolant into the intake, causing white smoke and eventually hydrolock or coolant-related engine damage.
• Fuel-in-Oil Dilution, the HPCR fuel system can leak fuel into the engine oil through failed injector seals or fuel pump issues, leading to crankshaft bearing damage as the fuel-diluted oil loses its lubrication properties.
• DPF (Diesel Particulate Filter) Clogging, the 6.4 was the first Powerstroke with DPF, and the system is prone to clogging and constant regeneration, causing fuel economy degradation and potential downstream issues.
• Radiator Failures, the plastic radiator end tanks crack under thermal stress, causing coolant loss.
• Up-Pipe Cracking, the exhaust up-pipes from the heads to the turbo can crack at the welded joints, causing exhaust leaks and boost loss.
• HPFP (High-Pressure Fuel Pump) Failures, the high-pressure fuel pump can fail and contaminate the entire fuel system with metal particles.
• Poor Fuel Economy, the 6.4 averages 10 to 13 MPG in typical use, significantly worse than the 6.7L Powerstroke that replaced it.

Average lifespan without major repair is approximately 100,000 to 150,000 miles, significantly less than the legendary 7.3L Powerstroke (often 400,000 plus miles) or the modern 6.7L Powerstroke (250,000 plus miles routinely). The 6.4 Powerstroke was produced for only three model years (2008, 2009, 2010) precisely because of these concerns.

Why Then Would Someone Buy a 6.4 Powerstroke

Despite the issues, there are valid reasons to source a used 6.4 Powerstroke:

• You own a 2008 to 2010 Ford Super Duty and need a replacement engine. Sourcing a used 6.4 is typically affordableer than swapping to a 6.7L or 7.3L (which would require ECM, harness, transmission, and fuel system changes).
• The strong factory power output, 350 HP and 650 lb-ft of torque, is competitive for its era and the compound turbo gives it strong towing characteristics.
• Aftermarket “bulletproofing”, the diesel performance community has developed extensive solutions for known 6.4 issues, including improved EGR coolers, stronger pistons, ARP head studs, fuel-in-oil mitigation, and DPF / EGR delete kits (for off-road and competition use only).
• Workhorse capability when maintained properly, owners who proactively address known issues with preventive bulletproofing often get 200,000 plus miles of reliable service.

Heavy-Duty Diesel Engine Family Context

The 6.4 Powerstroke (this listing) is the Ford / Navistar V8 turbo diesel for the 2008-2010 Ford Super Duty applications. For buyers comparing heavy-duty diesel engines across OEMs and architectures: the 6.4 Powerstroke (this listing, 6.4L V8 turbocharged diesel with compound turbo setup, HPCR fuel injection over 26,000 PSI, dual EGR coolers, DPF aftertreatment, 350 HP and 650 lb-ft, used in Ford F-250 / F-350 / F-450 / F-550 Super Duty 2008-2010, the LAST Navistar-built Powerstroke before Ford brought diesel design in-house with the 6.7L) is the Ford / Navistar V8 turbo diesel from a documented troubled era. For comparison, the Cummins ISB 6.7L (our vaz180 listing, inline-6 turbocharged diesel with VGT turbocharger and HPCR fuel injection over 30,000 PSI, four generations from 2007.5 through current production, 350-420 HP and 610-1,075 lb-ft, used in Dodge / Ram 2500 / 3500 / 4500 / 5500 heavy-duty pickups and Freightliner Business Class M2 medium-duty trucks, cast iron block and head, legendary B-series Cummins reliability with 500,000 plus mile commercial service life common) is the Mopar inline-6 turbo diesel alternative for HD pickup applications. Two different heavy-duty diesel approaches from the same era: 6.4 Powerstroke V8 with compound turbo and documented reliability concerns; Cummins 6.7 ISB Inline-6 per vaz180 with VGT turbo and legendary B-series reliability across four refined generations. Both engines have aftermarket bulletproofing ecosystems, but the Cummins reputation is significantly stronger for long-term commercial service life. For Ford Super Duty owners considering platform alternatives, the 6.7L Powerstroke (the in-house Ford diesel that replaced the Navistar 6.4 starting model year 2011) is significantly more reliable; for Ram HD owners, the Cummins 6.7 per vaz180 has been the dominant choice since 2007.5.

6.4 Powerstroke Engine Technical Features

• Compound Turbocharger Setup: The 6.4 uses a compound turbo system (NOT simple parallel twin turbos as sometimes described). One smaller high-pressure turbo handles low-RPM boost; a larger low-pressure turbo handles high-RPM boost. The two turbos work in series for maximum boost capability across the entire RPM range.
• High-Pressure Common Rail Fuel Injection: Delivers fuel at extreme pressures (over 26,000 PSI) for optimized combustion efficiency.
• Dual EGR Coolers: Two EGR coolers help meet emissions regulations. Unfortunately, this is also a known failure point.
• Cast Iron Block and Heads: The 6.4 uses cast iron throughout (NOT aluminum heads as sometimes incorrectly listed) for durability. Some references describe the block as CGI (compacted graphite iron) for additional strength.
• 17.5:1 Compression Ratio: Standard for a heavy-duty diesel.
• OHV Pushrod Valvetrain with 4 Valves per Cylinder: 32 valves total provide good breathing for power output.
• DPF / DOC / Exhaust Aftertreatment: The 6.4 was the first Powerstroke with full diesel aftertreatment (DPF and DOC). No DEF / SCR yet (that came with the 6.7L).
• Exhaust Brake: Integrated exhaust brake helps manage speed on downhill grades, valuable for heavy towing.
• Advanced Cooling System: Heavy-duty radiator and oil cooler to handle the heat output of compound turbo operation.

The 6.4 Powerstroke Engine Vehicle Applications

The 6.4 Powerstroke is found exclusively in Ford Super Duty trucks:

• Ford F-250 Super Duty (2008 to 2010)
• Ford F-350 Super Duty (2008 to 2010)
• Ford F-450 Super Duty (2008 to 2010)
• Ford F-550 Super Duty (2008 to 2010)

The 6.4 was NOT used in:

• F-150 (which uses smaller engines)
• E-Series vans (Ford retained the older 6.0L Powerstroke in E-Series longer)
• F-650 / F-750 medium-duty (which used the larger Cummins ISB or Navistar MaxxForce engines)

Performance and Power

• Horsepower: 350 HP at 3,000 RPM
• Torque: 650 lb-ft at 2,000 RPM
• Modified Performance: With proper bulletproofing and tuning, the 6.4 can be safely modified to 500 to 600 HP. Beyond that, the engine internals become unreliable.

Recommended Aftermarket Bulletproofing for Long-Term Reliability

If you install a used 6.4 Powerstroke, we strongly recommend the following preventive bulletproofing modifications:

• Improved EGR coolers (Bullet Proof Diesel, Sinister Diesel), addresses the #1 reliability concern
• ARP head studs, prevents head gasket failures under stress
• Coolant system upgrade (aluminum radiator), replaces the failure-prone plastic end tank radiator
• EGR / DPF delete kit, for off-road and competition use only; significantly improves reliability and fuel economy but is not street legal in any US state
• Quality fuel filter system (S&B, FASS), extends HPFP life by removing water and contamination
• Preventive fuel system flush, clears any pre-existing metal contamination from prior HPFP issues
• Forged piston upgrade (if budget allows), eliminates the cylinder #2 and #7 piston cracking risk

Vehicle Compatibility

Why Buy From Part Nests

• Honest disclosure of 6.4 Powerstroke known issues before you commit
• All 8 cylinders compression tested before shipping
• Oil sample analysis for fuel-in-oil dilution
• Piston borescope inspection for cylinder #2 and #7 cracking
• Both EGR coolers inspected (known failure point)
• Compound turbo function verified
• Free freight pallet delivery to all 50 states
• 15 day replacement warranty on internal defects
• Bulletproofing strategy consultation available
• Honest discussion of 6.7L Powerstroke upgrade alternative if appropriate for your situation
• Call (855) 634-4447 to confirm Ford 6.4L Powerstroke engine (Navistar-built V8 turbocharged diesel produced 2008-2010 model years, the LAST Navistar-built Powerstroke before Ford terminated the long-running Navistar partnership and began designing the 6.7L Powerstroke in-house for 2011 plus, closely related to the International MaxxForce 7 used in non-Ford commercial truck applications), donor truck (Ford F-250 Super Duty 2008-2010, F-350 Super Duty 2008-2010 single and dual rear wheel, F-450 Super Duty 2008-2010 chassis cab and pickup, or F-550 Super Duty 2008-2010 chassis cab work truck), year verified (2008 / 2009 / 2010), all 8 cylinder compression test results, oil sample analysis for fuel-in-oil dilution check (a known wear mode causing crankshaft bearing damage), piston inspection via borescope where possible for cylinder #2 and #7 crack check (the catastrophic piston cracking failure mode), both EGR cooler condition (the dual EGR cooler design is a known failure point causing white smoke and hydrolock risk), DPF condition documented (the first Powerstroke with diesel particulate filter, prone to clogging), compound turbocharger function verified for both HP and LP stages (NOT simple parallel twin turbos despite some descriptions, the two turbos work in series for maximum boost across entire RPM range), HPFP high-pressure fuel pump pressure verified (known failure point that can contaminate the entire fuel system with metal particles), up-pipe inspection for crack at welded joints (known wear point), bulletproofing strategy consultation, the 6.4 Powerstroke documented reliability concerns (approximately 100,000-150,000 mile average lifespan without major repair, significantly less than the legendary 7.3L 400,000+ miles or modern 6.7L 250,000+ miles routinely), and heavy-duty diesel family context (6.4 Powerstroke Ford / Navistar V8 with compound turbo vs Cummins 6.7L per vaz180 Inline-6 with VGT turbo and legendary B-series reliability across four refined generations 2007.5-current) before ordering