2018 FORD F150 STROKE DIESEL FIRST LOOK !
Channel: max automotive
Date: 2018-01-16

This spring Ford will introduce a new flagship engine to its perennial best-selling and recent Motor Trend Truck-of-the-Year-winning F-150 pickup line—a 3.0-liter 250-hp, 440-lb-ft Power Stroke turbodiesel V-6 capable of hauling 2,020 pounds or towing 11,400. We asked what took so long because Ford essentially started work on this “Duratorq/Lion” series engine in 1999 and has been building and selling it since 2004 (in Jaguars, Land Rovers, Peugeots, Citroëns, and an Aussie Ford SUV). In response, engineers downplayed the association with these earlier engines, claiming that North American diesel engineers from the 6.7-liter Power Stroke V-8 program thoroughly redesigned it, and when pressed on the timing they suggested that the stars have only just fully aligned with the arrival of the 10-speed automatic in the aluminum truck.

So how new is this “lion-hearted” engine? The compacted graphite iron block and 16.1:1 compression ratio carry over, but the crankshaft, crank and rod bearings, fuel injection system, turbocharger, and exhaust crossover pipe all required re-engineering to withstand the more severe duty cycle this engine was expected to face in an F-150. The crank receives different machining and heat treatment to increase its strength, and the bearing material alloy is altered to improve durability. Common-rail fuel injection pressure increases from 26,100 to 29,000 psi, and multiple pilot-injection events reduce the idle clatter that plagues many diesels. The single Honeywell variable-nozzle turbocharger is revised to better withstand sustained high heavy loads (such as towing 11,400 pounds up the Davis Dam), with boost pressure peaking around 20-22 psi. That crossover pipe gets new metallurgy and a redesign of its accordionlike flexible section in anticipation of greater thermal cycling. All in, with a 6.5-quart oil sump, the new engine weighs 620 pounds—about 150 more than the aluminum 3.5-liter EcoBoost.

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