I took my car in for A/C repair and ask the shop to not change out the factory parts. Not only did they change it from R12 to 134 without my permission, they said they did work on the timing chain. After reading all that goes into the timing chain from your site, that had nothing to do with the air condition. I am sure now they took my parts off my car and put old parts. I no longer have factory head gaskets but want to know if you can do a detail inventory of my car down to the pistons, engine block. They did so much work around the engine and I was not having problems with the car starting or driving. I just needed the A/C repaired. I would like to bring in the detail invoice and discuss my problem. I have gotten hit hard on car repairs twice. I need some help