Yeah, i've done quit a few brake jobs, and never had to bleed the system. I make sure to loosen the master cylinder cap, and wrap a rag around it. Just in case the fluid rises out. I have also bought the wrong rotors!!! Put them on and the wheels would not budge. I then went to take them off, and the lugs would not come off!! I had to buy an impact wrench, which did the job.