When you replace your rear calipers and ONLY rear calipers. Do you need to bleed the 4 lines.. RR, LF, LR, RF.. or can i just bleed the rears?...

 

anyone?

 

you just need to bleed the rears if your replacing the rears.

 

I'm almost sure that you need to do all 4

 

Wouldnt hurt to check the fronts, but most vehicles you just need to bleed the calipers you replace as they're individual lines.

 

you just need to bleed the corner you worked on.

There is just no possible way air could go back through the lines, through prop valve and into master cylinder all the way from rear caliper. lol even if you were to blow at it very very hard. Just make sure your reservoir is topped up so you wouldn't get air from there in.

 

I know whenever I change calipers I never bleed my system I just do maybe three-five pumps and call it a day. What I normally do is take soft bendable metal wrap it around the break line and vice grip it off to pinch it.