rotor problem HELP im new to this

[vrsprspt]

Did you clean new rotors with a solvent (thinners, brake clean or similar) before fitting calipers and pads?

Might differ between brands, but don't new rotors have a light oil or the likes to stop them from rusting? If this is the case, I would think you need new brake pads now anyway because of this

 

[BlackVXGTS]

Spray some water on your rotors and leave them for a couple of hours. The rotors will tarnish a little. When you apply your brakes again you will see the (shiny) area where your brake pads are contacting the rotors. Your brakes won't work at their best until the pads have bedded in and contact is being made across the whole surface of the rotors.

 

[sleepyjean]

You did not mention if your car has ABS. also no mention of how you went about changing the rotors.
I hope you cleaned the new rotors before you put them in, the wax on them will not help. How did you expand your calipers? force the pistons in with a clamp or screwdriver did you open the bleed valve?
ABS requires the bleed valve to be opened or you could damage the braking system, this could explain the pedal feeling too soft.

 

[vrsprspt]

Never heard the bleed valve needing to be opened with ABS....you mean the bleed valve on the caliper when you push the pistons back yeah? Am curious to know more as my SS has ABS and doing brake upgrade soon with braided lines

 

[Not_An_Abba_Fan]

ABS requires the bleed valve to be opened or you could damage the braking system, this could explain the pedal feeling too soft.

No it doesn't. Can't tell you how many pads I've replaced in ABS cars and never had a problem.

If just replacing rotors and leaving the old pads, then the pistons shouldn't need pushing in much, maybe 1 or 2mm. It will most likely be a pad to rotor contact issue, IE old pads - new rotors, the pads will need to be bed in to the rotors.

 

[vrsprspt]

No it doesn't. Can't tell you how many pads I've replaced in ABS cars and never had a problem.

Yeah thought the same, have replaced pads in my car before no dramas, that's why asked to know more to see if they had any useful information that could back up their claims.

 

[Tasmaniak]

Unless he disconnected the brake hose when changing the rotors.

 

[Cheap6]

Never heard the bleed valve needing to be opened with ABS....you mean the bleed valve on the caliper when you push the pistons back yeah? Am curious to know more as my SS has ABS and doing brake upgrade soon with braided lines

The reasoning is that if there is crap/residue between the calliper and ABS unit you can push it back into the ABS unit with the displaced fluid where it can block the valves. It requires that the stuff is in the line in the first place so with a maintained brake system is never going to be a problem.