My santro 2007 is giving grilling sound on rough road from front left wheel. The problem almost identified as that of callipers or brake dics.
How to make make sure that if its callipers or brake dics.

Whats the adjustemnt of callipers? The is a kit available in market which includes calliper bolts and bushes. some mechanic says to use brass bushes for that.

will the brass bushes tight in callipers or should move freely? want to know the adjustemnt..