Squealing when driving - brake and it goes away - road salt???

superatticman · February 3, 2019

Just noticed an intermittent squealing noise coming from the car when driving. Touch the brake pedal and it goes away. So obviously disc or pad related. Did notice a hell of a lot of salt on the discs. Could this be the culprit?? Surely not a wear indicator considering I just bought it a month ago!!!!

Texas · February 3, 2019

Wait til the rains come! ( won't be long we are in England!) and it might subside alternatively get in there with a hose pipe as try to rinse any possible salt residue away. Could be a sticking caliper slide pin not allowing the pads to fall away from disc after a braking event, might be good idea to get these pins greased at next service as a special because it is not a point in any service schedule. ( the IS250 is prone to sticking slide pins and Lexus will normally recommend changing caliper @ £300+)

Paul m.

superatticman · February 3, 2019

Thanks. Rain due tomorrow so proof of pudding will be forthcoming sooner than later.

Car has 3 year main dealer Lexus warranty on and was only bought a month ago. Will contact the dealer to report the issue. There's always the possibility of the sticking pins and I'd expect them to sort this if so. May just be a consequence of the council being very liberal with their salting!

ColinBarber · February 3, 2019

The GS series IV doesn't have a floating calliper design and therefore doesn't have sliding pins.

Normally the wear indicator acts in the way described but given the circumstances it probably is grit/dirt stuck in there.

Texas · February 4, 2019

Everyday a school day! So the GS hasn't got caliper slide pins, happy days, you ain't gonna suffer the IS problem then!

paul m.

Ten Ninety · February 4, 2019

21 hours ago, ColinBarber said:

given the circumstances it probably is grit/dirt stuck in there.

I would second that. I've had an occasional stone chipping get caught up somewhere and it can make all sorts of squealing noises that only go away under braking. I have found that a short, sharp, violent blast of reversing can be a suitable cure, having checked the mirrors first of course!

superatticman · March 20, 2019

Still have an intermittent squealing noise similar to what I had before. There is the odd squeak from the brakes when applying all low speed too. Funnily enough looking at the cars history on the lexus portal, there is a reference to 'investigate squeaking brakes' around two years ago. Wonder what the situation would be for a potential resolution under warranty? I guess there's nothing actually 'wrong' with the brakes, as squeaking is semi common if you are walking next to the road. Just a bit irritating really. I guess the only resolution would be new pads or discs of which would be quite an ask under warranty.

Will try the quick 'reverse blast' in a local car park tonight too.