Originally Posted By: OVERKILL
I don't think I'll have time for that in the next few days however, as I have a VERY busy month coming up unfortunately
I kinda wish you'd waited until you actually had time to carry out the advice you're receiving.
Some Googling indicates that your M5 has 2-piston floating calipers. This complicates things greatly, for now you have twice the probability of a seized piston on either side. Plus you have the standard floating-caliper bugbears of seized pads and seized pins
And you definitely need to check for trueness of the rotor. I see your rotors are slip-on over the hub. This adds yet another variable: rust buildup between rotor and hub. This can make the rotor wobble as it spins. To confirm the presence of that, you need a dial indicator (cheap Grizzly one will do).
Pistons can rust (or are yours stainless?) and old brake-fluid can cause really thick gum to build up. You MUST check for all the above things or you're wasting your time and everybody else's.
Considering that you live in the Rust Belt, and considering the age and the unknown maintenance history of the vehicle, anything anybody tells you now is a guess. You need to do what I've said, and actually look at the parts in question the way I said to.
I don't think I'll have time for that in the next few days however, as I have a VERY busy month coming up unfortunately
I kinda wish you'd waited until you actually had time to carry out the advice you're receiving.
Some Googling indicates that your M5 has 2-piston floating calipers. This complicates things greatly, for now you have twice the probability of a seized piston on either side. Plus you have the standard floating-caliper bugbears of seized pads and seized pins
And you definitely need to check for trueness of the rotor. I see your rotors are slip-on over the hub. This adds yet another variable: rust buildup between rotor and hub. This can make the rotor wobble as it spins. To confirm the presence of that, you need a dial indicator (cheap Grizzly one will do).
Pistons can rust (or are yours stainless?) and old brake-fluid can cause really thick gum to build up. You MUST check for all the above things or you're wasting your time and everybody else's.
Considering that you live in the Rust Belt, and considering the age and the unknown maintenance history of the vehicle, anything anybody tells you now is a guess. You need to do what I've said, and actually look at the parts in question the way I said to.