$1100. is nothing to shake a stick at. Expensive as hell, sure it is, car repair is Big Business. We all cringe at the sound of well.. we have found out the problem,.. and it's not good. Oh no that expensive feeling again, just hit my checkbook or the dent this will put into my credit card.
Warranty or lack there of. Let them F this up, it's all on them for the parts and labor. No SM likes a warranty repair return order. Piece of mind for the owner, is to get it fixed first, get it right second, and make sure I don't have to return to fix this again third. Let them deal with the problems and the time taken. Yes you do have to pay for it, but then again " your " not having to deal with it, or having your baby worked on by unknowns. Yes brand new right out of the box parts can be bad right from the mfg. It does happen, how will you know if your part is good, to begin with?
Thermostat replacement should be part of this repair, along with any suspect belts/hoses. How far or how much are you willing to spend/afford when it is torn down is the question? Do it now while all is apart. Nothing like going back or having another related issue with your cooling system, after the fact. No owner likes to throw money at fixing sh*t. Tight and on a budget, until I don't have a choice. What is the dealer warranty for this repair? 1 yr/12K or 90 days/3k miles? Watch for anything during the parts warranty period, that trips your trigger as to " that's not right, oh no I have to return to the dealer" for this problem again. You will thank yourself, for all the money you had to pony up front, when or if it comes to that return visit. Another diagnostic fee, another hour @ $105. a pop, oh no not this time I paid for that, the first time I was in here.
Hope you back up and running the twisty's soon.