Tonser Posted August 14, 2009 Share Posted August 14, 2009 Hi I took delivery of my 54 GT yesterday, and all is good However one thing I have noticed is a grinding noise when going round a tight corner slowly on full (or near full) lock, coming from the front drivers side. Sounds very much like the disc backing plate is catching on the disc at full lock - could that be possible ? Cheers for any advice Tony Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted August 14, 2009 Share Posted August 14, 2009 Brake Pads maybe. Quote Link to comment Share on other sites More sharing options...
Tonser Posted August 14, 2009 Author Share Posted August 14, 2009 Thanks Zmanalex - I was wondering that. Though it only happens when you get towards full lock, and it doesnt grind through a full wheel rotation - more like something is catching at one or 2 points through the 360 degrees. I'm hoping to get a chance to look at it this afternoon. Cheers Tony Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted August 14, 2009 Share Posted August 14, 2009 If something is catching, then you will easily see it once underneath. Thanks Zmanalex - I was wondering that. Though it only happens when you get towards full lock, and it doesnt grind through a full wheel rotation - more like something is catching at one or 2 points through the 360 degrees. I'm hoping to get a chance to look at it this afternoon. Cheers Tony Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted August 14, 2009 Share Posted August 14, 2009 Also check that your pas fluid is at the correct level. Quote Link to comment Share on other sites More sharing options...
narcotix Posted August 14, 2009 Share Posted August 14, 2009 Hey, I'm actually having the exact same problem ... I hadn't noticed it before but it's become more apparent since I've had my car back from the bodyshop ... I've had a quick look around under the arches and couldn't see any obvious areas it was catching on ... It'd be interesting to find out if you do find a cause/solution ... Quote Link to comment Share on other sites More sharing options...
Tonser Posted August 15, 2009 Author Share Posted August 15, 2009 Well I had the front wheels off today to try to work out what's going on. I couldn't see any obvious signs of something catching, but there was quite a build up of flaky rust around the back edge of the discs. I scraped them both down to clean them up, and checked the pads, which have about 6mm left on them each. There were no signs of uneven wear. One thing I noticed was that the drivers side disc fell away from the hub as soon as I had the wheel off whereas the pass side wouldnt come off the hub - are they only held on by the wheel nuts ? When i put it all back together the drivers side disc still had a slight scraping noise when i just spun it, but only at one point through the rotation. I took it for a spin and the problem is still there. It's worse if you push hard into a right hand corner, and it's fine on left hand corner. It seems the more you load the front drivers side through a right handed the more it rubs. Anyone any suggestions? Thanks, tony Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted August 15, 2009 Share Posted August 15, 2009 Well I had the front wheels off today to try to work out what's going on. I couldn't see any obvious signs of something catching, but there was quite a build up of flaky rust around the back edge of the discs. I scraped them both down to clean them up, and checked the pads, which have about 6mm left on them each. There were no signs of uneven wear. One thing I noticed was that the drivers side disc fell away from the hub as soon as I had the wheel off whereas the pass side wouldnt come off the hub - are they only held on by the wheel nuts ? When i put it all back together the drivers side disc still had a slight scraping noise when i just spun it, but only at one point through the rotation. I took it for a spin and the problem is still there. It's worse if you push hard into a right hand corner, and it's fine on left hand corner. It seems the more you load the front drivers side through a right handed the more it rubs. Anyone any suggestions? Thanks, tony Did you check your wheel bearings for wear when you had it jacked up ? Quote Link to comment Share on other sites More sharing options...
Tonser Posted August 15, 2009 Author Share Posted August 15, 2009 Nope But realised that I should have done ! I'll jack it up tomorrow and check for any play on the wheel. I wouldnt have thought it was bearings as there is no vibration at all, just the scraping noise when turning right. That said would a dodgy bearing cause the disc to be unstable under different loads (ie turning right) ? I'll report back tomorrow Cheers Tony Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted August 15, 2009 Share Posted August 15, 2009 That said would a dodgy bearing cause the disc to be unstable under different loads (ie turning right) ? Yes, if there is play on the bearing then noises are possible depending on which load is being applied. Quote Link to comment Share on other sites More sharing options...
Tonser Posted August 16, 2009 Author Share Posted August 16, 2009 Just had it up on the jacks again to check the front wheel bearings, and there is no play in the front wheels at all Any ideas ? Thanks Tony Quote Link to comment Share on other sites More sharing options...
Carbon Coops Posted August 16, 2009 Share Posted August 16, 2009 were the discs lipped? does it brake ok no woble vibration or pull? How much clearence is there between the disc and shield behind? Did you check for stones Trapped? coops Quote Link to comment Share on other sites More sharing options...
Tonser Posted August 16, 2009 Author Share Posted August 16, 2009 All sorted It was as I first thought, the disc backing plate was right up against the inside lip on the back of the disc, with only a marginal clearance. The cornering force must have been pushing them together. So it was simple as levering it away from the disc a tad Thanks you your help. Tony Quote Link to comment Share on other sites More sharing options...
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