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Hi Rhys,
The noisy rear brakes became the third or fourth problem for me to solve after an engine harness and fpr introduction to volvo. I found a surprising wealth of stuff on line about tricks to correct volvo brake noise, some I mentioned. Four 240s later and a green book lists the notched piston alignment as a cause for brake noise, so I tried it. Now, Rhys, I found them maybe 10 or 15 degrees off, and I have no idea what forces make them become misaligned, but it was only that one car that persistently sang like a school bus-- until realigning those pistons.
I've looked at (eyeballed) others when replacing pads, but now that I think about it, they had no squeal to motivate me to adjust them.
Actually never bought Volvo branded pads except for the rear and only for that noisy car. You mention the steel and rubber coated shims? I still don't know how they are supposed to be used; I put the rubber one toward the piston and, some sil-glyde between the pad backing and the stainless shim. Never saw the rubber coated except that it came with the factory pads...
Yes, dust from those volvo pads. Everywhere else, I have been using Metal-masters. They have the familiar scrunch noise that sometimes set the rear springs to resonate as I try to creep or switch between drive and reverse without being firm on the brake pedal, which I like, and associate with well performing brakes.
The notch thing was such a successful event I just had to speak up and relate the anecdote. I have mucho respect for anyone doing this work all day professionally and then taking time to contribute to this forum.
5 240s and 3 captive "customers"
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Art Benstein near Baltimore
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