How do you change brake pads on a 1990 300zx

Best to spend the $20 on a repair manual . It goes into a step by step description as well as having a picture of what you are looking at. Just remember that is the only way to stop your vehicle and if you muck it up you can hurt others as well as yourself . It`s a very simple job , BUT if don`t know what you are doing you endanger others as well. Maybe best left to a pro.