This is now the second time I have used AG Diesel Repair and they know their stuff. Diesel engines are not simple so it really matters who works on them. AG Diesel Repair gets that and wants their customers to get it as well. They actually keep old parts on hand so they can demonstrate what could happen if, or what might happen when. They bring customers right alongside and educate as well as repair. This time, they replaced an injector and thermostat for me and everything went great. They are experienced and skilled and absolutely all for the customer. I highly recommend the company.