This powertrain secondary cooling system is also used for cooling of EGR circuit, transmission fluid, and fuel cooler. The compressed and hot intake air is cooled by a water-to-air intercooler which is connected to a secondary cooling system of the engine. The exhaust volume of this system is smaller, providing a much more dynamically responsiveness of the engine. In engine valley, there is also a Garrett GT32 DualBoost variable geometry single sequential turbocharger (SST). The intake air goes through ports inside the valve covers, while the exhaust gases into exhaust manifolds located in the lifter valley (in a traditional V8 engine, the exhaust exits from the outside). Every valve is equipped with its own rocker arm and pushrod. Each cylinder has for valves (two intake and two exhaust valves 32 valves total). All 6.7L blocks are manufactured by American foundry company, Tupy.įirst for the truck segment, Ford's 6.7L Power Stroke uses cast-aluminum cylinder heads. This affects positively on engine longevity. The engine was equipped with piston cooling jets for lower piston and combustion temperatures.
The connecting rods have an end cap that is rotated 45 degrees to increase strength. The 6.7 Power stroke also features a steel crankshaft, powdered-metal cracked-cap connecting rods made by Mahle, and Federal Mogul cast-aluminum pistons. This block layout in addition to the CGI material provides significant weight savings over the 6.4L predecessor. Its deep-skirt block also has nodular iron six-bolt main caps highly common on the 7.3L Power Stroke instead of the 6.4L's bed plate. While the majority of current diesel engines use heavy cast iron, the 6.7L Power Stroke has a cylinder block made from compacted graphite iron (CGI).
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