My husbands work has told him that he will now be working 7 days a week 12 hours a day until furthure notice. He is in the mechanics field in CA , but not for a dealership. Can you tell me if he is entitled to any overtime for the days after the 7th day? Thank you for your help.

Here are the overtime requirements for California.
http://www.dir.ca.gov/dlse/FAQ_Overtime.htm