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MG MGF Technical Scraping noise from left side rear wheel - I think BBS discussion at MG-Cars.info
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MG MGF Technical - Scraping noise from left side rear wheel - I think
| Evening all, Well, now that I've got the MOT finally.. I'm back in Velma... Another problem however which I actually had before the MOT as well. I have a scraping noise from the left rear wheel (I think its that one) it mainly happens while braking at slow speed or going slowly round a right hand bend. Before you all say brake pads.. they've actually just been changed to get it through the MOT so it won't be those.. I've searched in the archives and the following has been mentioned as possibilities: - calipers not coming off properly after braking - hub bearings - pads - discs Any other ideas? I think the MG dealer is hating me at the moment so they'll love me when I nip back again :-) Chris |
| Chris Tromans |
| Worth spending a few minutes jacking up that side and seeing if the wheel rotates freely - chock the wheel the other side carefully though. This will quickly establish whether the noise is coming from a binding caliper or pad, probably the most likely suspects. |
| Mike Hankin |
| could it be the the ride height how does the car look when level????/ is one side lower if so then u might need hydrygas pumped or its the sphere failure... sorry u are having trouble at the moment the only way is up darren |
| darren jeffery |
| Ok, Jacked the car up last night... and both sides kind of make the same sound (jacked each up separately)... the wheel rotates but the sound certainly isn't the same as when I hear it going along... Cheers Chris |
| Chris Tromans |
| Its now off to MGR on Tuesday morning for them to take a quick look... as said before they've just replaced the pads on it last week so hopefully they'll be no cost for them to strip it down, check it and put it back together properly... but I'll check when I take it in... |
| Chris Tromans |
| Apparently its nothing to do with the brakes... and they (MGR) think it is the tyre on the rim so I believe they're taking the tyre off the rim and putting it back on again... I'll find out in about an hour as I'm off to pick it up again.... I'll find out the exact details in a bit and post them up here cos I'm not really sure what they're talking about :-) Cheers Chris. |
| Chris Tromans |
| That's a new one! - unless there is something in there, probably one of their spanners from all the work they keep bodging!! :) |
| Tony |
| Ok... here's the official report ------------- "removed all road wheels & checked condition of breaks - OK. Heard scraping/creeking from n/s/r wheel area, checked for small mice in the area, suspect that tyres on the rim are dry, tyres require bead breaking & rim lubricating"... ------------- Ok... I actually made the "mice" bit up... but They didn't actually have time to do that tho as "the tyre man was busy".... But... and here's the good point... they did seem it great to tell me they haven't charged me for anything... yep thats good... because you haven't actually done anything :-) To cut a long story short although I suspect it will get longer... still got the noise which I'm sure is getting louder... and when I drove back from that garage with the hood down in the sun I may have looked cool to people passing by... but I bet I sounded like a complete w@nker ;-) Off to a tyre garage to get my beading broken and myself lubricated tomorrow... that sounds slightly stimulating...!! Cheers Chris. ps. is it just me or do I seem to have a few ongoing sagas with my F :-) |
| Chris Tromans |
| If the noise was still audible when you had no weight on the wheel, I'm struggling to see how it can be the tyre. Awaiting further news with extreme curiosity..! |
| Mike Hankin |
| Ah.. it didn't Mike when I jacked it up... apologies if I've had an ambigiuous moment earlier in the thread :-) The two wheels (left and right) make a slight noise when rotating but I gather thats because the pad is "very slightly" against the disc all the time... but when jacked up the suspect wheel doesn't make the loud noise that I get when I drive along... I hope to feed your curiousity soon when the noise has been quietened... Chris |
| Chris Tromans |
| Hmmm.... Just taken it to a local tyre place round the corner... and they said "it sounds like they don't know what they're talking about... we'll take a look for £9.99 but I think you're wasting your money" :-) If this doesn't solve it then it will be at B&G's at the weekend for them to take a look... then I'll just send all the bills to MGR :-) Watch this space... Chris. |
| Chris Tromans |
| Lubricating tyres? They will be oiling the brakes next to stop them squeeking! |
| GrahamH |
| >> suspect that tyres on the rim are dry, tyres require bead breaking & rim lubricating << That would be a new one on me too. I wonder whether, as Mike suggests, one of the pads is failing to fully retract from the disc? Might be a case of removing the pads and thoroughly cleaning the calipers and ensuring that the pads move easily in the carrier Chris. |
| Rob Bell |
| Hi Rob, MGR have had the car in and checked the pads and everything to do with the brakes... its now back from the tyre place... and they said its nothing to do with the tyres. I'm now bored with MGR so I'll phone B&Gs... Chris |
| Chris Tromans |
| Your symptoms match what I had last year. Caliper replaced - problem solved. |
| Steve Madden |
| Cheers Steve... I'll bear that in mind... Its not a constant noise, it only does it on one part of the wheel rotation so as I slow down the gaps between the noice get longer... as I speed up they get shorter... even if I'm really really really really crawling along its still there (ie, stationary traffic jam speed)... Does this match yours Steve? I just phoned MGR again and they say "there is nothing mechnically wrong with the car"... I was very close to using the "bullsh**" word but refrained... They don't seem overly willing to help me... Even more annoying is, this morning I dipped over the 60k miles on the clock.. which means if it is anything warranty based then I have to now pay 10% towards the parts (labour will still be covered 100%)... when it went into MGR earlier this week it was UNDER the 60k miles! Chris. |
| Chris Tromans |
| Chris The "scraping noise from the left rear wheel ... mainly happens while braking at slow speed or going slowly round a right hand bend" was what prompted me to take it to the garage. They found that the pad was wearing unevenly (to the point that the little metal warning thing was just scraping the disc) and the caliper wasn't binding or releasing properly. If I remember rightly, there was a rhythm to it much as you describe. I was also finding it hard to engage the hand-brake when parking on a slope. We replaced the caliper and fitted new discs and pads (the car was on about 80k miles at the time so the discs were quite worn and fraying at the rims) and all was fettled. |
| Steve Madden |
| Addendum: ...fitted new discs and pads on *both* sides of the car. |
| Steve Madden |
| Chris I'm sure there are a few things you can do to get closer to finding the issue. Have you tried swapping wheels around to see if the noise moves with the wheel? Swapping pads around? Changing pads? Coating the inside of the wheel with talc, paint or anything that will show interference? |
| Adrian |
| Adrian... They just changed the pads last week... like the talc idea tho... I'll try that... I can't swap the wheels tho can I... as I have directional tyres (toyos) on? Will that not make it unsafe? I guess unless I drive slowly... What frustrates me is that MGR had the car in for a whole day earlier this week and achieved nothing towards solving the problem. They say the pads are fine, the discs are fine, the hubs are fine and the bearings are fine... Chris |
| Chris Tromans |
| I'm sure that temporarily swapping the wheels around and then getting a mate to listen as you drive up & down the road @ 10mph isn't going to be that unsafe, is it? |
| Adrian |
| Adrian... I agree... I've planned to do this on sat with a mate of mine who's got axle stands... as I think I'll struggle with only one jack and no Geoff Capes around to hold the back up while I swap the wheels over... When I got home tonight I actually managed to re-create the noise with the car stood still and then moving the car forwards and backwards by holding the tyre and pushing - handbrake was on at the time.. but its definately some kind of creaking noise... that none of the other wheels make. Chris. |
| Chris Tromans |
| Adrian and others, Latest update is that I've just been round a mates house and we swapped the rear wheels over and the noise stays on the same (passenger) side so yep... nothing to do with the wheels. He thinks its the bearing on that side but surely MGR would know this? A new fact may help a bit more: If I'm coming up to a junction its very prominent but as I'm pulling away from the junction its virtually quiet. Any how... its going back into MGF on monday now for round 42 with it. B&G's were booked up too far in advance :-( Cheers Chris |
| Chris Tromans |
| Hey folks... got some news... I'm going to pick my "fixed" car up in half an hour!!!! :-) Second time around... they diagnosed a duff wheel bearing and are replacing under warranty right now... Much thanks to all on this one... especially Adrian with the suggesion of swapping the wheels over to check... I have a feeling that made them blush this morning ;-) Cheers Chris |
| Chris Tromans |
| Ho ho ho ho... oh bugger The noise is now back again :-( can anybody confirm whether MGR mechanics actually know what they're doing? It's not as loud for the moment but its definately increasing again... and only seems to do it now when the car has warmed up a bit after a few miles... Oh well, back to MGR it goes again... I sent my warranty claim form off yesterday as well.. that could be interesting.. Chris. |
| Chris Tromans |
| My mate has EXACTLY the same problem. I reckon it must be pad against disk that causes the noise. Suspect warped disk and possible stuck caliper. This weekend we'll take it to bits and clean it up - I'll post any positive results. |
| Russell Parslow |
| Thanks Russell, It would be good to know the results before Monday morning as then I let the MGR mechanics what they need to do ;-) thats when its booked in again.. Chris. |
| Chris Tromans |
| Chris - Short answer - warped brake discs. This is so obvious I can't believe the dealer missed it. Rob Bell also hit the nail on the head when he said "thoroughly cleaning the callipers and ensuring that the pads move easily in the carrier" Long answer: (I'm using page 586 of the MGF Workshop Manual 8th Edition "REAR BRAKE CALIPER COMPONENTS" to name the components involved - I can send this page to anyone who needs it by fax or email.) Ok. The problem was two fold. Firstly it looks like the brake disc is warped and secondly the brake pads were not moving freely in the caliper carrier. The rear of the car was jacked up and supported on axle stands. The rear passenger (nearside?) wheel was removed and Guide Pin Bolt removed with a 12mm ring spanner. The Caliper Body was slid from the caliper carrier leaving the pads in the carrier against the disc. Putting a wheel nut on one of the studs and using a wheel brace to turn the hub the gap between disc and pad could be seen to vary as the disc turned. Warped, or not "true" Brake Disc. I don't know how much warp is acceptable but a proper garage ought to have the tool to measure the amount of wobble of the disc. The pads were removed, with some difficulty, from the carrier as well as the shims. All parts had the dust and dirt brushed off and put back into the carrier where the pads were still found to not to be moving freely. A little light filing of the pads, and some copper grease between pads and the shims in the carrier then everything put back on the car and a test drive. No more rubbing noise. It seems that pads weren't moving freely in the carrier so were not releasing from the disc producing the rubbing noise. The warped disc is responsible for the pulsating nature of the noise. Good luck with garage - make sure they don't give it to the pimply-faced trainee apprentice. |
| Russell Parslow |
This thread was discussed between 24/03/2005 and 16/04/2005
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