Ford 6.4L Power Stroke Diesel

2008-2010 · 6.4L · International / Navistar

vehicle configs

failure modes

parts

recipes

2 + 5

recalls + bulletins →

symptoms compared →

✓

buyer's checklist →

6.0 Power Stroke and 6.7 Power Stroke →

Failure modes

DPF clogging / regeneration problems

EGR cooler failure -> #8 hydrolock

Front-cover pump cavitation erosion (coolant into oil)

Head cracking under advanced-timing tunes

High-pressure pump (Siemens K16) destruction

Piston ring failure #7/#8 (regen fuel wash)

Rocker arm tip wear

Compound turbo bearing-seal leaks

Valve guide wear (no bronze sleeves)

Parts

6.4L Power Stroke Fuel Contamination Repair Kit, 2008-2010 (XDP) part-64-fuel-contamination-kit 6.4L Power Stroke Ford Specification Gold HOAT Coolant (6.4L Power Stroke) part-psd64-coolant 6.4L Power Stroke O-Ringed Cylinder Head, loaded (Powerstroke Products) part-psd64-cylinder-head 6.4L Power Stroke 6.4L Cylinder Head Service (valve guides, machine work) part-psd64-cylinder-head-service 6.4L Power Stroke Degas Bottle Cap (OEM) part-psd64-degas-bottle-cap 6.4L Power Stroke Diesel Particulate Filter (OEM) part-psd64-dpf 6.4L Power Stroke 6.4L DPF Cleaning Service (editorial) part-psd64-dpf-cleaning-service 6.4L Power Stroke DPF Pressure Sensor (OEM) part-psd64-dpf-pressure-sensor 6.4L Power Stroke EGR Cooler (OEM) part-psd64-egr-cooler 6.4L Power Stroke EGR Cooler, second unit (OEM) part-psd64-egr-cooler-secondary 6.4L Power Stroke EGR Valve (OEM) part-psd64-egr-valve 6.4L Power Stroke Long Block (built, stock-OE spec) part-psd64-engine-long-block 6.4L Power Stroke Engine Oil, CK-4 15W-40 (6.4L Power Stroke spec) part-psd64-engine-oil 6.4L Power Stroke Exhaust Manifold Gasket (OEM) part-psd64-exhaust-manifold-gasket 6.4L Power Stroke Fan Clutch (OEM, severe-duty) part-psd64-fan-clutch 6.4L Power Stroke Fuel Filter Element (OEM) part-psd64-fuel-filter 6.4L Power Stroke 6.4L Fuel System Flush / Cleaning (post-K16 failure) part-psd64-fuel-system-flush-kit 6.4L Power Stroke Glow Plug (OEM) part-psd64-glow-plug 6.4L Power Stroke Glow Plug Relay / Control Module (OEM) part-psd64-glow-plug-control-module 6.4L Power Stroke Head Gasket Set (OEM) part-psd64-head-gasket-set 6.4L Power Stroke 6.4L Power Stroke Head Stud Kit (ARP 2000) part-psd64-head-stud-kit 6.4L Power Stroke High-Pressure Fuel Pump (Siemens K16), Ford reman part-psd64-hpfp 6.4L Power Stroke 6.4L HPFP Upgrade Paths (editorial) part-psd64-hpfp-upgrade 6.4L Power Stroke Fuel Injector (Siemens piezo), Ford reman part-psd64-injector-set 6.4L Power Stroke Oil Cooler (OEM) part-psd64-oil-cooler 6.4L Power Stroke Radiator (OEM) part-psd64-radiator 6.4L Power Stroke 6.4L Power Stroke Rocker Arm / Valve Cover Sets (OEM style) part-psd64-rocker-arm-kit 6.4L Power Stroke Thermostat (OEM) part-psd64-thermostat 6.4L Power Stroke Compound Turbocharger, Ford reman part-psd64-turbo 6.4L Power Stroke Water Pump (OEM) part-psd64-water-pump

Recipes

The 6.4 reliability package (modes fm-64-head-cracking-tunes / fm-64-piston-ring-failure / plus cooling discipline): stock the truck against its two tuning-adjacent killers - head cracking on advanced-timing tunes and #7/#8 ring scuffing from regen fuel wash

Emissions-side repair (modes fm-64-egr-cooler-hydrolock / fm-64-dpf-clog): the 6.4 has TWO EGR coolers (primary 9P456-C and secondary 9F464-F) - both are suspects in coolant-loss/hydrolock, and the hydrolock path feeds cylinder #8 at shutdown

The K16 high-pressure pump event (mode fm-64-hpfp-destruction): the 6.4's signature catastrophic failure

From the blog

Buyer's guideFord 6.4L Power Stroke Diesel

Buying a Used 6.4 Powerstroke: What to Check, What It Costs and Which Years

October 6, 2026 · 16 min read

Reference for this engine

Oil, filters and coolant: 6.4 Power Stroke, 2008

from the owner's manual

Repair costs for this engine

3 failures priced in parts

Part number lookup

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