Kenworth showed off its assembly plant and processes in Chillicothe, OH, including allowing this look at mounting and bolting in Paccar's latest engine, an 11L MX-11 diesel, to the chassis and frame of a new truck.

Click through the sequence to view this slice of production. This truck in particular, which was completed Wednesday, is a T680 for Oakland, CA-based third-party logistics company Dreisbach Enterprises; the engine is spec'd at 425 hp/1,450 lbs.-ft. of torque.

Though it was just launched a few months ago in January, Kenworth says the new 11L engine already is going into 5% of the T880 vocational trucks being produced. "It saves 400 lbs. over the MX-13 and it's great as a light-weighting option," noted Kurt Swihart, Kenworth's marketing director, adding that the company is seeing uptake of the engine in bulk hauling, less-than-truckload, regional haul and pickup and delivery applications.

"We very pleased and we see a lot of upside potential for it," Swihart said.