Sources at General Motors Corp.'s Powertrain Div. say machining of cylinder heads for the 4.6L Northstar twin-cam V-8 will be temporarily outsourced to a Canadian company. Northstars slated for '00-model Cadillacs have been substantially revised and improved, which necessitated a large-scale retooling at the engine's production facility in Livonia, MI. As most of the Northstar line undergoes refitting, cylinder head machining was outsourced to Comtech in Guelph, Ont., in order to keep ...

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