Caught! First Underhood Shots of Ford's New 4.4-Liter V-8 Diesel Engine
By: Mike Levine Posted: 07-23-08 08:00 PT
© 2008

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In the past several months, we’ve caught pictures of Ford F-150 engineering mules testing Ford’s new 4.4-liter V-8 diesel engine on public roads. We even saw an unofficial photo of the 4.4-liter diesel on display at Ford’s national dealer show in Las Vegas. Now, in the pickup truck equivalent of snapping shots of the Brangelina twins, we have the first pictures of the 4.4-liter V-8 oil-burner cradled under the hood of an F-150.

These pictures were caught in public while the F-150 was being prepped for transport.

The cosmetic engine cover appears to be loose, resting over the back of the engine and almost touching the firewall. The plastic shield is clearly labeled “Power Stroke,” indicating Ford intends to carry on with the well-known diesel brand name in spite of its ongoing legal dispute with Navistar and the automaker’s expected divorce from the long-time diesel-engine supplier. Ford has partnered with Navistar for its diesel engines since 1982.

The 4.4-liter V-8’s plumbing is complex. Where the engine is uncovered, you can see what appears to be a large cylindrical air-intake line snaking off the air filter on the far right (facing the truck) of the engine compartment and going across the width of the engine, then diving down next to the battery. Interestingly, it looks like the intake has an air-regulator chamber (the small rectangular box attached to the front of the intake) like a gas engine. You can also see a small square box sitting on top of the intake -- that’s the mass airflow sensor. A second intake also branches off the air filter, immediately vanishing toward the back of the engine. It may not be visible in these pictures, but the second intake appears to be lacking a mass airflow sensor. The large rectangular box between the front intake, the suspected air-regulator chamber and the radiator housing is probably an electrical box.

In a picture of the 4.4-liter engine’s cooling system, it looks like the intercooler for the turbos and transmission oil cooler are housed in a single unit, at the bottom of the F-150’s massive radiator.

To be built in Mexico, the 4.4-liter V-8 will be offered in production F-150s by late 2009, and by 2011 it is expected to be the base diesel engine in Ford's Super Duty pickups. Power ratings are expected to be at least 340 horsepower and 430 pounds-feet of torque. Fuel economy is expected to be as much as 20 percent higher than Ford’s 5.4-liter V-8 gasoline engine.

We expect to see the 4.4-liter diesel F-150 officially debut at the 2009 Chicago Auto Show.

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