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In 2011 Ford introduced the 6.7L Powerstroke diesel engine. It was the first medium-duty diesel engine both designed and built by Ford. When it was in the design stages of development, Ford engineers code-named the engine “Scorpion”. The reason behind that name was because the exhaust manifold and the 6.7L turbocharger were mounted in the “valley” of the engine. +Read more
Originally the engine had 390 horsepower and 735 lb-ft of torque. Shortly after it was released, to compete with the updated 6.6L Duramax diesel, the 6.7L Powerstroke was increased to 400 horsepower and 800 lb-ft of torque.
Changes in 2012 included a replacement for the plastic oil pan and drain plug with a more durable stamped steel oil pan and conventional bolt-type oil plug. To measure how effective the SCR system was, a second NOx sensor module was added to the exhaust system. Also, new bolt-on fittings replaced the quick-connect coolant and oil feed lines for the turbocharger.
In 2013 they added a crankcase ventilation sensor. This signals to the PCM if the crankcase vent hose is connected or disconnected.
When it first came out the 6.7 Powerstroke had a unique single sequential turbocharger (SST). It featured a dual compressor and a single turbine setup which was joined to a common shaft. Later, in 2015, it was replaced by a single Garrett GT37 variable geometry turbocharger (VGT). That change and a few additional upgrades increased its horsepower and torque.
2015 also saw several other significant changes. Several sensors were added including the particulate matter sensor and sensor module to the DPF, a single low-pressure fuel system sensor and an EGR inlet temperature sensor. The EGR cooler flow was redesigned as well as additional heat sinks were added to the fan clutch to help dissipate heat. To go along with the new VGT the 6.7 Powerstroke received a new exhaust braking system. Ford didn’t stop there, they also revised the fuel injectors with a more efficient nozzle to reduce emissions, gave it a larger crankshaft damper and strengthed the cylinder head and introduced a high capacity torque convertor.
