I can only comment on the thermostat replacement. Since it is a temperature-actived valve, it will always blow the core and stay wide open if overheated.

Understanding that, I can see why a shop would automatically replace one when a car is brought in for any type of overheating complaint.

The PROPER procedure would be to remove the thermostat and test it for proper operation with hot water and a thermometer. Of course, that's what you and I would do, but we're not out there digging for gold in our customers' pockets, are we?

Over all, I heartily agree with your assessment of the services (not) rendered by the shop. I, after spending a lifetime in the military, tend to raise hell when someone tries to pull this act on me.

The worst problems I ever had was with a shop in Omaha, Nebraska that I had used for years and was very happy with. Unfortunately, I had to take my Lincoln Town Car in on a day when the regular manager was on vacation. The work and treament I received was abysmal, and I called the owner of the chain to let him know how I felt. The 'temporary' manager - who I discovered was actually the district manager! - got to finish out the week. Then they terminated his employment. Originally I typed 'terminated him' but that was only wishful thinking!

The only way to correct problems like you had is to vote with your feet and spread the word. Of course, a letter to the BBB never hurt, either!