GDI fuel injectors are placed below-center of the intake valves. An oil pan is also aluminum.ģ.5L EcoBoost cylinder heads are aluminum with four valves per cylinder, pent-roof combustion chambers, centrally located spark plugs (iridium spark plugs), and two overhead camshafts. The cylinder block got oil jets spraying oil on the underside of the pistons to keep them cool and strong. High-strength aluminum and CNC machined pistons have low friction coating on the piston skirt and piston top shape specially designed for efficient combustion. The engine is equipped with forged steel I-beam connecting rods and forged steel crankshaft with 6-bolt main bearing caps.
The EcoBoost block is all aluminum and an open-deck design with high strength steel sleeves. The 3.5 EcoBoost is built around the Duratec 35 (Ford Cyclone V6 engine) engine block with the same bore and stroke dimensions.