Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1923
New brake pads - squeak/squeal when turning left??
Feel like such a dick. Done more work on cars than I care to recall, but when doing the front pads on my D3 I mis-routed the wear sensor cable and it wore through in a heartbeat.
That's sorted now (cut, sliced and pushed up under the wheel arch for another day) but I have a really annoying squeal when braking and when turning left (without braking).
Never had this before.
What's the likely cause? (Used plenty of copper grease I think).
Thanks.PAGODA
16th Jul 2019 3:33 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
could be a piston stuck in the caliper.
quite common.
remove caliper and see if the pistons push in freely
could try a bit of wd40 behind the rubber seal
16th Jul 2019 5:11 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
If you think about if as you turn the wheel the forces are all against the wheel bearing and this would be the first thing I would be checking.
Copaslip has its uses but if you want truly squeak free brakes you will need some of the universal anti rattle shims/pads that fit between the piston and the back of the pad.
Ps dont use wd40 on the calliper seals, use brake fluid.
16th Jul 2019 7:41 pm
pagoda
Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1923
Thanks both of you.
I replaced the front right hub last year; the left was ok at the time. Not a bad idea to check that. It's on 93K so wouldn't surprise me if it's on the way out. I'm about to do controls arms so... in for a pound...PAGODA
18th Jul 2019 12:21 am
Bardley
Member Since: 02 May 2018
Location: Hertfordshire
Posts: 441
When you changed the brakes, did you take the caliper off? If the flexi brake pipe is twisted, or not smooth in its path to the caliper, it will tighten as the steering changes. This will change the pressure in the pipe, so moving the caliper pistons.
Also check that the pads are fitted the correct way. Pads (Apec being one) can be handed now, and have a chamfer on the leading edge to prevent squeal.
There's not a lot to do when servicing brakes, so my best advice is to take them apart again, and use silicon grease on the slide pins, cleaning them first, then clean and refit pads to a clean caliper, making sure the grime is clear from the piston boots.2011 MY D4 HSE
Previously 2001 D2 TD5, 1996 D1 300Tdi, 1985 90 2.2 petrol.
Bikes! KTM, BMW, British, Classics and others.
18th Jul 2019 7:29 am
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
Make sure that the slider pins move ok on the caliper carrier and use a good red rubber grease on the pins.
People use copper slip but this causes the rubber gators to expand and makes the brakes bind
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