The closing was largely expected after Navistar agreed earlier this month to stop producing diesel engines for Ford Motor Co. Navistar's Brookville Road plant produces engines used in Ford's F-Series pickup.
The two facilities employ a total of 700 workers, Navistar spokesman Roy Wiley said this morning.
"This is a difficult decision because of the impact it has on our employees and the community where we live and work," Navistar Engine Group General Manager Eric Tech said in a statement. "But the significant change in Ford's business plans has forced us to make this decision."
The decision to stop making diesel engines was part of a settlement reached in a legal dispute between the two companies. Ford claimed Illinois-based Navistar wasn't adequately sharing warranty costs for the engines and raises prices "without adequate explanation or support for its actions."