you are about to make a huge mistake, first of all just because it blows hot air doesnt necessarily mean ur compressor is the culprit or the only culprit...u can have a leak from anywhere...expansion valve, shrader valve, evaporator,reciever drier etc,etc...also ur system has to be vacuumed out to get all the moisture from the system or the contaminants will ruin any new components, here is what u need to do...take it to a shop that does a/c work and have them do a systems check on it to determine what is exactly wrong with it,if u have the knowledge to do this work then by all means go for it,but do not just replace ur compressor and thing things are going to work fine after that