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Automotive Intelligence News

News of August 07, 2002


 


New Vortec 3500 I-5 And 2800 I-4 Engines: Power Of A V6, Efficiency Of An I-4

PONTIAC, Mich. - Leveraging the technology of its highly successful Vortec 4200 inline six-cylinder engine, GM has created two additional inline engines with excellent driveability features for mid-size pickup truck customers: the Vortec 3500 inline five-cylinder and Vortec 2800 inline four-cylinder engines. Both engines will be available in the 2004 Chevrolet Colorado and GMC Canyon and will provide the power of a V6 with the efficiency of an I-4.

Common Design

The Vortec 3500 and Vortec 2800 are, in large measure, scaled down versions of the award-winning Vortec 4200 six-cylinder engine.

With their common design, the new inline I-5 and I-4 engines feature the same all-aluminum construction, dual overhead camshafts and four-valves-per-cylinder technology as the Vortec 4200. The new engines also share the I-6's high 10:1 compression ratio, electronic throttle control, exhaust cam phasing, coil-on-plug ignition, direct-mount accessories and easy maintenance features.

The cast aluminum four- and five-cylinder engine blocks and aluminum cylinder heads are produced using the same "lost foam" casting process as the Vortec 4200. This process allows more exact dimensional control while reducing machining efforts in oil galleries, coolant and other internal passages.

Overall, the new engines share 75 percent of their components with the Vortec 4200 and 89 percent of their components with each other. This provides customers with highly proven design features and enables GM to develop and introduce them more quickly and at a lower cost. Commonality also allows the engines to be manufactured more cost effectively and gives GM a unique ability to adjust production in response to changing market trends.

The Vortec 3500 I-5 is targeted to produce 215 horsepower and 225 lb-ft of torque. The Vortec 2800 I-4 is targeted to deliver 170 horsepower and 175 lb-ft of torque.

(August 1, 2002)

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