Hello XXXXX'm Chris, a current Ford Lincoln Mercury employee.
Thanks for visiting Just Answer. I will do my very best to help you resolve your concerns.
This vehicle has 2 primary chains in the front of the engine and 2 secondary chains one is on the front and one is on the back of the engine. Labor for all 4 is 15 hours. All 4 range from 27-98 $
Click here for directions
The PDF formats above which you click in blue will show you removal and installation and timing procedure.
You original post did not include all the info until a moment ago so I did not know a chain was broken or I would of altered my post. You need to determine why it broke and then do replace this single chain and tensioners.