brake noise
Moderators:MarkX, mike020150
just had my front brakes done ,discs and pads,when slowing down they are screeching just before i come to a stand still( 2000 xkr,drilled discs)
Re: brake noise
Whether drilled, grooved or dimpled, this is unlikely to be an issue.
Fitting technique applied to pads is more important. I`ve often found that new pads can bind on the caliper body due to a high paint build or fractionally over long pad backing length. If calipers have not been completely cleaned of old hardened pad dust on the running surfaces, this can also cause a further issue. Paint and length have caused issues on my XJR in the past. When fitting pads, I relieve the ends of the pads with an angle grinder and flappy disc to ensure the pads do not stick in the caliper. That achieved, I apply a little copper grease to the running surfaces to ensure the pads don`t stick in service. I also ensure all pistons move freely, have removed corrosion and dust and applied copper grease where the pistons make contact with the pads. Anti-squeel shims should be fitted if specified. Thses may have been mis-placed during earlier brake overhaul work.
New discs should have been fitted to perfectly cleaned wheel hubs and checked for disc run out before the car is returned to service. Use of a dial test indicator ensures the discs are running perfectly in line with the face of the hub.
Some pad sets are not supplied with the leading edge of the pad being angled. The angle applied to that leading edge ensures that the pad does not grab the disc in an uncontrolled fashion. This may have some bearing on your squeel issue.
Watch out for my series of three brake overhaul articles in coming issues of our magazine in the X350 pages. This gives fitting hints and tips which will also be applicable to other Jaguar models.
Mike K
Fitting technique applied to pads is more important. I`ve often found that new pads can bind on the caliper body due to a high paint build or fractionally over long pad backing length. If calipers have not been completely cleaned of old hardened pad dust on the running surfaces, this can also cause a further issue. Paint and length have caused issues on my XJR in the past. When fitting pads, I relieve the ends of the pads with an angle grinder and flappy disc to ensure the pads do not stick in the caliper. That achieved, I apply a little copper grease to the running surfaces to ensure the pads don`t stick in service. I also ensure all pistons move freely, have removed corrosion and dust and applied copper grease where the pistons make contact with the pads. Anti-squeel shims should be fitted if specified. Thses may have been mis-placed during earlier brake overhaul work.
New discs should have been fitted to perfectly cleaned wheel hubs and checked for disc run out before the car is returned to service. Use of a dial test indicator ensures the discs are running perfectly in line with the face of the hub.
Some pad sets are not supplied with the leading edge of the pad being angled. The angle applied to that leading edge ensures that the pad does not grab the disc in an uncontrolled fashion. This may have some bearing on your squeel issue.
Watch out for my series of three brake overhaul articles in coming issues of our magazine in the X350 pages. This gives fitting hints and tips which will also be applicable to other Jaguar models.
Mike K
X350 Co-ordinator
2004 XJR
2004 XJR
Who is online
Users browsing this forum: No registered users and 7 guests