The extensive overhaul of Navistar’s product and corporate lineup continued last week as top sales executive Jim Hebe retired, more details emerged about new models, and the company agreed to replace three directors to avoid a proxy battle.

Navistar International Corp. is considering possible plant closures as new CEO Lewis Campbell looks to cut costs and restore profitability at the struggling truck maker.

Navistar International Corp. may close some of its North American plants as new CEO Lewis Campbell looks to cut costs and restore profitability at the truck and engine maker.

TOOELE, Utah — Navistar’s choice of exhaust gas recirculation over selective catalytic reduction to comply with U.S. emissions rules failed not because of the technology, but because the company had no partners in the effort, said Jim Hebe, Navistar’s senior vice president for North America Sales Operations.

HANOVER, Germany — The new truck-making powerhouse in Europe headed by Volkswagen AG is unlikely to make a play to acquire U.S.-based Navistar International Corp., according to interviews with company officials and others.

In their second week in charge, the new management team at Navistar International Corp. reported a quarterly loss for the three months ended July 31 and laid out plans for a return to financial health in the wake of the company’s recent change in its truck engine emissions strategy.

Truck and engine maker Navistar Inc. can continue selling its noncompliant MaxxForce engines using exhaust gas recirculation, but the penalties will be nearly double what was originally proposed, according to an Environmental Protection Agency final rule that went into effect Sept. 5.