Page 3 of 3
Re: Disc pulse.
Posted: Tue Nov 06, 2012 7:24 am
by SteveD
Jean wrote:Try lightly scrubbing the troublesome disk with some medium sandpaper. It might have some glaze on it.
Rub the sandpaper in little circular motions, not round-and-round the circumference.
Don't forget to do BOTH sides!!
Good suggestion Jean. It made quite a bit of difference.
Previously, the wheel would spin but then stop quickly as it was caught at the pads. After a bit of sandpaperin' the disc will rotate without any resistance from the pads. The pulse is still just discernible, so I might have a longer go with the paper after work tomorrow.
Re: Disc pulse.
Posted: Tue Nov 06, 2012 10:35 am
by Jean
One "invisible" drop of tree-sap on your rotor can cause SUCH problems.
Try also wiping the rotor with a little laquer thinner to remedy this. Use turpentine if you are surrounded by pine trees.
Re: Disc pulse.
Posted: Wed Nov 07, 2012 12:32 am
by SteveD
Jean wrote:One "invisible" drop of tree-sap on your rotor can cause SUCH problems.
Try also wiping the rotor with a little laquer thinner to remedy this. Use turpentine if you are surrounded by pine trees.
No sappy trees where I park, at work or in the home garage. I was thinking that the commuting that I do without any real serious braking might not encourage an adequate clean of the disc?
I have a mountain ride coming up, so hopefully that'll provide some more deglazing. I'm using some oem BMW pads at the moment too and they seem to grab much less than the others I had in.