My car has been running extremely cold according to the gauge. I have come to the conclusion that my Tsat needs to be replace. The part is cheap, it is the replacement that concerns me. Can I do this myself? I am not a mechanic, just an big fan of cars. How difficult is the process? I would like to do it over the weekend, do I need to put my car on a lift to get it done? The car is a Viggen.