brake rotor plating
10-16-03, 11:54 AM
#26
Eats, Sleeps, Dreams Rotary
Thread Starter
Originally posted by David Beale
OK, sorry for being a bit slow. The noise is caused by the fact that the disk is not perfectly centered between the calipers. When designing brakes there are two ways of dealing with this. The first method lets the pistons "float" on both sides. Then they will "auto centre". The second method is to let the caliper body float. You will see some caliper bodies with springs in the bolts that hold them to the mount. One brake pad is fixed to the caliper body, the other has a piston - it's a cheaper way to go. We have the first type. If one of your pistons is jammed, or otherwise not very free to move (due to corrosion or dirt), the caliper will put a side force on the disc. This is the creak noise you hear. It may be time to remove the calipers and clean or replace them (depending on what exactly is the problem). You can also get noise from the shims and springs (M-spring in the manual) if they are worn/damaged/installed incorrectly or missing entirely.
Bottom line is you need to inspect the calipers or get them checked out by someone who knows their stuff. You probably don't have a safety issue yet, but there is something wrong that should be fixed. It will probably cause strange wear if you leave it this way. The grease I referred to is called "brake grease" and is available from brake parts stores.
BTW, they make this noise when you are moving too, but you probably just can't hear it over the tire noise, wind noise, etc., though it is possible movement allows the pistons to adjust better so it doesn't apply side force at all.
OK, sorry for being a bit slow. The noise is caused by the fact that the disk is not perfectly centered between the calipers. When designing brakes there are two ways of dealing with this. The first method lets the pistons "float" on both sides. Then they will "auto centre". The second method is to let the caliper body float. You will see some caliper bodies with springs in the bolts that hold them to the mount. One brake pad is fixed to the caliper body, the other has a piston - it's a cheaper way to go. We have the first type. If one of your pistons is jammed, or otherwise not very free to move (due to corrosion or dirt), the caliper will put a side force on the disc. This is the creak noise you hear. It may be time to remove the calipers and clean or replace them (depending on what exactly is the problem). You can also get noise from the shims and springs (M-spring in the manual) if they are worn/damaged/installed incorrectly or missing entirely.
Bottom line is you need to inspect the calipers or get them checked out by someone who knows their stuff. You probably don't have a safety issue yet, but there is something wrong that should be fixed. It will probably cause strange wear if you leave it this way. The grease I referred to is called "brake grease" and is available from brake parts stores.
BTW, they make this noise when you are moving too, but you probably just can't hear it over the tire noise, wind noise, etc., though it is possible movement allows the pistons to adjust better so it doesn't apply side force at all.
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djritz
3rd Generation Specific (1993-2002)
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08-25-15 02:46 PM
