Chevy 4.2L Engine
From 2002 through 2009 Chevy produced a mid-sized SUV known as the Trailblazer. The Chevy Trailblazer comes with several engine options, the base model being a 4.2L, in-line six-cylinder Vortec engine.
Double Overhead Cams
The 4.2L had double overhead cams and utilized variable cam phasing. It had four valves per cylinder, making the total valve count 24. The Vortec had a cylinder bore of 3.66 inches and a stroke of 4.01 inches; this produced an overall displacement of 256 cubic inches. It also had a compression ratio of 10.1 to 1. The block of this Vortec engine was made from cast iron.
This 4.2L in the Chevy Trailblazer produced 275 ft-lbs. of torque at 3,800 rpm. This is a significant advantage over the Jeep Grand Cherokee and the Dodge Durango’s 235 ft-lbs. at 4,000 rpm. It also has a slight advantage over the Ford Explorer V-6, which produced 254 ft-lbs of torque at 3,700 rpm. These torque numbers pushed the Trailblazer’s maximum towing capacity to 6,300 lbs.
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