Rebuilding The 6.6L Duramax Diesel sbintl（6.6 l Duramax柴油 sbintl重建）.pdf

Rebuilding The 6.6L Duramax Diesel By Roy Berndt It was really no surprise, since GM had single-handedly alienated the American buying public against the diesel engine beginning back in the late ’70s and early ’80s with the 5.7L V8 and 4.3L V6 diesel engines that were, let’s just say, “less than stellar.” While there’s no point now in rehashing mistakes of the past, the 6.2L and 6.5L diesels had continued on in a similar tradition, even though the 6.5L was used in the HUMVEE for the military. In order to have a winning truck this time, GM needed to have a winning diesel powertrain. The General already had two strikes and a third may have put GM out of the diesel pick-up market altogether. A small group of stakeholders led by the Planning Group reviewed proposals from numerous possible diesel engine manufacturers for the all-new truck. The decision was reached to go with a proposal from one of GM’s partners – Isuzu Motors LTD, a company founded in 1916 and, with a long history of successful diesel technology, recognized worldwide as a leader in diesel engines. The proposal was developed as a part of a strategic 90-day study conducted by Isuzu and GM, relative to Isuzu’s role in the GM Global enterprise. While Isuzu’s plan called for a “Clean Sheet” brand new engine design that would not be ready until 2003, GM’s new HD pickup truck was going into production in late 2000. After high-level executive meetings, Isuzu found a way to pull ahead the timing to meet GM’s needs. In May 1997, the project team was established under the leadership of Jim Hogan, GM Truck Group; Yoshihiro Tadaki, Isuzu; and Jim Kerekes, representing GM Powertrain. The project was codenamed “B908” (bridge between U.S. and Isuzu, 90-day study and 8- cylinders). This would be the first V8 diesel engine Isuzu ever designed for the U.S. HD pickup market. Isuzu was responsible for the base e