I have to replace the old caliper with a new caliper. Is it necessary to bleed the brakes, or can I just skip this process? Honestly I don't feel like bleeding the brake system

 

YES. YOU NEED TO BLEED THE BRAKES.

If you want to STOP, you need to bleed the brakes. A new caliper will have air in it (usually a lot of air), and any air at all in the brakes will affect how well they work. A caliper full of air will prevent them from working, period.

-=Russ=-

 

I second this. Anything done to the brake system without bleeding it = not going to stop. I can tell a huge difference when there are just a couple of tiny little bubbles...much less a whole caliper filled with air.

That being said, you don't necessarily have to bleed the whole system...but it is vital to bleed that new caliper to get the air out.

 

i just bled my hole system. it was quite simple with a motive power bleeder. i hate bleeding brakes and this unit actually made it enjoyable, a sense of of accomplishment so to speak.