Around 160 car component workers at the Federal Mogul plant in Coventry walked out on strike on Monday of this week over attempts to make them work longer for no extra pay.
Bosses want workers to put in three more hours every week – an extra 132 hours each year – without a pay rise.
The company is attempting to blackmail staff by threatening to shut the plant and move production abroad unless they accept the changes.
Speaking from the picket line, Unite rep Benny Suckling said, 'Most people here are already on a 12-hour shift with only half an hour break – that's a long day.'
Since Federal Mogul bought out Ferodo in 1998 it has shut the canteen and social club.
Union members are refusing to return to work unless negotiations begin on any redundancies or closure.
The sister plant at Chapel‑en‑le-frith faces lay-offs and a four day week. The news comes just weeks after Federal Mogul announced plans to axe 4,000 jobs worldwide, and reduce their global workforce by 8 percent.
Federal Mogul brought in agency workers in an attempt to break the strike. The company recorded a $4 million profit between July and September.