6.7L Power Stroke Diesel

6.7L Power Stroke Specs & information

Codenamed the Scorpion during its developmental stage, the 6.7L Power Stroke is Ford's in-house built diesel engine for the Ford Super Duty. Ford chose to design, engineer, and produce its own diesel engine to maintain profitability and a competitive edge in the growing diesel segment. This is the first Power Stroke not manufactured by long time partner, International Navistar. The absence of a partner seems to have given Ford an advantage over competitors, granting them the freedom to design an engine that fits their specific needs and the needs of their customers. Additionally, it streamlines the warranty process, which was partially responsible for souring the relationship between Ford and International in regards to problems with the 6.0L. The Ford, International partnership lasted nearly 30 years, but Ford seems to be doing just fine on their own.

As with any new engine, potential truck buyers initially questioned the platform's reliability despite reports of extensive durability testing. Fortunately, Ford seems to have hit a home run with the 6.7L, which impresses in the departments of performance, fuel economy, reliability, and as we're slowly finding out, longevity. Over 500,000 6.7L Power Strokes were sold in the engine's first three years of production.

The 6.7L Power Stroke initially employed a unique single sequential turbocharger (SST) which features a dual compressor and single turbine setup affixed to a common shaft. The unit was replaced by a single Garrett GT37 variable geometry turbocharger (VGT) for the 2015 model year, subsequently increasing horsepower and torque in combination with additional upgrades. The SST returned to the Power Stroke for the completely revised 2017 model year Super Duty; torque reached an all time high at 925 lb-ft.

Also unique is the engine's exhaust and intake manifold designs. As opposed to a tradition V engine, the intake and exhaust flows are reversed - the intake manifolds are located on the outer deck of the cylinder head and the exhaust manifolds exit directly into the engine valley where the turbocharger is mounted. The unique exhaust flow design is said to increase thermal efficiency of the turbocharger.

6.7L Power Stroke Specs

Engine:

Ford Motor Company 6.7L Power Stroke diesel V-8

Displacement:

6.7 liters, 409 cubic inches

Production Years:

2011 to present model years

Block/Head Material:

• Compacted graphite iron engine block (CGI) with 6 bolts per main bearing cap
• Aluminum cylinder heads with 6 head bolts per cylinder

Compression Ratio:

16.2 : 1

Firing Order:

1-3-7-2-6-5-4-8

Bore:

3.90 inches (99 mm)

Stroke:

4.25 inches (108 mm)

Aspiration:

• Garrett GT32 DualBoost variable geometry single sequential turbocharger, wastegated, 2011 - 2014 MY
• Garrett GT37 single VGT, 2015 - 2016 MY
• Single sequential turbocharger, 2017 MY
• Air-to-water intercooler (charge air cooler or CAC)

Injection:

• Direct injection, 30,000 psi high pressure common rail
• 19mm Piezo actuated injectors with 8 hole nozzles
• Bosch CP4.2 high pressure injection pump

Valvetrain:

Conventional pushrod OHV, cam in block, 4 valves per cylinder (32 valve)

Cooling System:

Dual cooling systems; high temperature circuit for engine, low temperature circuit for transmission cooler, CAC, etc

Oil Capacity:

13 quarts w/ filter (2011 - 2016 MY), 15 quarts w/ filter (2017 MY)

Oil Requirements:

• CJ-4 or CJ-4/sm engine oil is required to ensure emissions system compatibility
• 10W-30 is the preferred motor oil viscosity for normal use
• 5W-40 or 15W-40 engine oil is recommended for severe duty or biodiesel applications. Viscosity recommendations vary with ambient temperature; refer to owners manual

Engine Weight:

Approx. 1,100 lbs w/ oil, 990 lbs dry

Emissions Equipment:

EGR, DOC, SCR, DPF (see below for comprehensive emissions system information)

Peak Horsepower:

2010 intro, pickup:

390 hp @ 2,800 rpm (introductory rating for 2010 MY, prior to August 2010 update)

2010 - 2014 pickup:

400 hp @ 2,800 rpm

2015 - current pickup:

440 hp @ 2,800 rpm

2011 - 2016 chassis cab:

300 hp @ 2,800 rpm

2017 chassis cab:

330 hp @ 2,800 rpm

Peak Torque:

2010 intro, pickup:

735 lb-ft @ 1,600 rpm (introductory torque rating for 2010 MY, prior to August 2010 update)

2010 - 2014 pickup:

800 lb-ft @ 1,600 rpm

2015 - 2016 pickup:

860 lb-ft @ 1,600 rpm

2017 pickup:

925 lb-ft @ 1,800 rpm

2011 - 2016 chassis cab:

660 lb-ft @ 1,600 rpm

2017 chassis cab:

750 lb-ft @ 1,600 rpm

 

6.7L Power Stroke Horsepower/Torque Curves

2011 6.7L Power Stroke horsepower & torque

6.7L Power Stroke horsepower and torque graph, 2011 MY introductory ratings

2011-2014 6.7L Power Stroke horsepower & torque

6.7L Power Stroke horsepower and torque graph, 2011 MY update - 2014 MY ratings

2015 6.7L Power Stroke horsepower & torque

6.7L Power Stroke horsepower and torque graph, 2015+ MY ratings

6.7L Power Stroke horsepower & torque, chassis cab only

6.7L Power Stroke horsepower and torque graph, 2011 - 2015 MY Chassis Cab Ratings

6.7L Power Stroke Emissions System Overview

• Exhaust gas recirculation (EGR). A unique feature of the 6.7L Power Stroke is that EGR flow is controlled by the EGR valve prior to entering the EGR cooler, as opposed to cooling the exhaust gases before EGR flow is managed. This post-cooling system reduces sludge and soot buildup in the EGR valve, minimizing maintenance.
• Diesel oxidation catalyst (DOC). The DOC is a ceramic catalytic converter designed to oxidize hydrocarbons in the exhaust stream.
• Selective catalyst reduction (SCR). The SCR is where diesel exhaust fluid (DEF; 32.5% urea) is injected & mixed into the exhaust stream. Diesel exhaust fluid is used to convert nitrous oxides into water & nitrogen. DEF fluid level must be maintained to ensure proper operation of the system and the truck (an empty DEF tank will result in reduced performance and speed).
• Diesel particulate filter (DPF). The DPF captures diesel particulate matter (soot) and uses active regeneration technology to heat the exhaust system periodically, completely burning soot build up & cleaning the filter.

Additional 6.7L Power Stroke Info/Features

• The 6.7L Power Stroke engine blocks are manufactured by American foundry company, Tupy. The engines are assembled in Chihuahua, Mexico.
• Ford Motor Company announced new power ratings for the 6.7L Power Stroke on August 3rd, 2010. Owners of the 390 hp model were able to receive a free dealer installed upgrade to achieve the new 400 hp power rating.
• The pre-production 6.7L Power Stroke was nicknamed the "Scorpion" due to its unique turbocharger mounting location and exhaust/intake arrangement.
• Engine features 6 bolt main bearing caps.
• "Instant Start" glow plugs are said to provide quicker starts in even the coldest of weather.
• Compacted graphite iron block for reduced weight (160 lbs lighter than the 6.4L Power Stroke).
• Engine uses fractured cap Mahle connecting rods.
• Features piston cooling jets for lower piston temperatures. Oil is jetted into the bottom or the piston and travels through a cavity within the piston, cooling the top of the piston before exiting. This helps lower combustion temperatures and increase engine longevity.
• B20 biodiesel compatible.
• 6.7L Power Stroke receives 18% increase in fuel mileage over previous 6.4L engines.
• The 6.7L Power Stroke diesel and TorqShift transmission are used in applications up to 50,000 lbs GCWR (F-650, F-750 models).