So to keep you out of all of this is best way for all parties involved… is to try to make a settlement… maybe you surrender your car and pay 2k… something like that… if it goes to court and your a no show they will get default judgment against you… and you will owe 6k+ and intrest is about 9% arp… shop will probably take a big loss and send it over to collections and sell your debt to a lawyer for pennies on the dollar. And this lawyer will try to collect the will put a lean on the car for sure… but will try to collect money from your work by garnishing your wages if they can… and will be a hold on you selling anything like house or cars for 10 year’s… length of a judgment can go longer if they refile it but probably not… so if you try selling a house you will have to pay collection company intrest and dollar amount of judgment… at the time… if you try fighting it in court the hear say of cost for repairs really wouldn’t help you too much because if they are smart they will pull up call record’s… remember it’s who ever wins will have to show with abundance of evidence showing you more then not agreed to cost… you can declare bankruptcy chapter 13 or 7… depending on which is best for you… I would first try to settle it. If not go to court and try to fight it all else fails bankruptcy or try to wait it out for it to expire in 10 year’s… but I can’t give you legal advice but this I think are your options and what will happen… but best option is try to settlement and see if they agree if they really want to push it and refuse then court and or bankruptcy and make them lose it all… so that’s why I would say settlement is best for all parties involved…

Can sue you and go after you personally for unpaid bill by getting a judgment against you. And send it to collections… so it can definitely damage your credit… and I would think they will go after you in court… technically they legally have to… because they have a car just sitting on there lot in order to reprocess the car and take it at value for part of repairs they have to get court order and sue you for damages

Take spark plugs out… look in the cylinder and see if it looks like it’s steam cleaned indicator of blown head gasket… also how does your oil level look