The 6.4L Power Stroke is based on International's MaxxForce 7 engine platform. International's design moved from the dated HEUI to a common rail injection system, the heart of which is a Bosch CP4 injection pump. The engine also takes advantage of sequentially mounted twin turbochargers, which provides such benefits as reduced turbo lag and improved overall performance characteristic. Learning from problems with the 6.0L Power Stroke, the 6.4 features larger M16 head bolts and the 4 bolt-per-cylinder design is favorably positioned for superior clamping force.
Although the cleanest and most powerful engine supplied to Ford by International, it would also be the last as Ford would begin offering their own design beginning the 2011 model year. The emissions equipment on the 6.4L proved to significantly reduce fuel economy compared with previous generations, and as such was the source of many complaints. Aside from this, the engine's are relatively reliable and possess good, honest performance characteristics.
6.4L Power Stroke Specs
Engine: |
6.4L Power Stroke diesel V-8 |
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Years Produced: |
2008 to 2010 model years |
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Displacement: |
6.4 liters, 390 cubic inches |
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B50 Life: |
375,000 miles* |
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Block/Head Material: |
Cast iron block, cast iron cylinder heads, M16 head bolts, 4 bolts per cylinder |
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Compression Ratio: |
17.5 : 1 |
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Firing Order: |
1-2-7-3-4-5-6-8 |
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Bore: |
3.87 in (98.2 mm) |
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Stroke: |
4.134 in (105 mm) |
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Aspiration: |
Turbocharged, twin sequential turbochargers, intercooled |
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Injection: |
Direct injection, high pressure common rail, Bosch CP4 injection pump |
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Valvetrain: |
OHV pushrod valvetrain, 4 valves per cylinder (32 valve), conventional single cam in block |
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Oil Capacity: |
15 quarts w/ filter |
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Engine Weight: |
Approx. 1,130 lbs w/ oil |
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Emissions Equipment: |
Exhaust gas recirculation (EGR), diesel oxidation catalyst (DOC), and diesel particulate filter (DPF) with active regeneration system |
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Fuel Requirement: |
ULSD (ultra low sulfur diesel) only, B5 biodiesel compatible |
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Gov. Engine Speed: |
~ 3,700 rpm |
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Peak Horsepower: |
350 hp @ 3,000 RPM |
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Peak Torque: |
650 lb-ft @ 2,000 RPM |
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Engine Dimensions: |
Length: |
32" (approx) |
Width: |
34" (approx) |
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Height: |
38" (approx) |
*B50 life based on published data for International's MaxxForce 7; the 6.4L Power Stroke is a derivative of the MaxxForce 7.
6.4L Power Stroke Twin Turbocharger Operation

Arrangement of the high and low pressure turbochargers on the 6.4L Power Stroke
Image copyright© Ford Motor Company
6.4L Power Stroke Horsepower/Torque Curves

6.4L Power Stroke diesel horsepower & torque curve.
6.4L Power Stroke Engine Serial Number Location
The serial number for a 6.4L Power Stroke engine is located on a half moon shaped section of the engine block on the driver's side, rear of the engine. A sticker that is applied during production will need to be removed in order to see the serial number. The first two digits will read "6.4", followed by a four digit manufacturing designator (HU2Y for engines built in Huntsville, AL and HU2U for engines built in Indianapolis, IN), and the final 7 digits are the sequential build number. The same information is also available on the front of the engine, on a sticker mounted on the EGR cooler. Here you will find the plant at which the engine was produced as well as the build number (build number is the last 7 digits of the number posted just above the lower bar code).