glasgow Posted May 14, 2016 Share Posted May 14, 2016 Recently done some work in the car. A) increased the height of the suspension, B) cut off a couple of mm of rear dedion tube C) replaced brake pads. Now with braking "hard" from 40-50 to 20-10mph I hear a noise at the passenger rear side. Best described as two spanners clanging. Had a look under the car and everything looks in place and nothing appears to be hitting or loose. I wonder if someone can help please. Thank youAhmed Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 14, 2016 Member Share Posted May 14, 2016 Brakes working fine and not pulling to one side? Handbrake readjusted and working? Check cable for contact again. Exhaust play OK and mountings tight?JonathanPS: No spanners missing? :-) Link to comment Share on other sites More sharing options...
glasgow Posted May 14, 2016 Author Share Posted May 14, 2016 Interesting about the brake, because the reason I changes the brake pads is the rear brake locking first. It is mainly the passengers side rear. Changed the front to Mintix 1144, not helped. Changed also the rear to uprated rear pads slightly helping but still looks like the same corner always brake first. But again this would not explain the banging noise, would it? Cable of hand brake does some contact with chassis but not the reason for the loud bang Exhaust is ok Link to comment Share on other sites More sharing options...
glasgow Posted May 14, 2016 Author Share Posted May 14, 2016 There is an observation which I am not sure how significant. The loud bang is very obvious (as in the audio record) when the car has not been driven for good few hours. Then it gets less obvious with the number of the harsh braking and after 6-7 brakes you would still here it but with difficulty. Leave the car for a few hours and the bang is loud again. Link to comment Share on other sites More sharing options...
revilla Posted May 14, 2016 Share Posted May 14, 2016 Are the rear pads properly installed in the caliper and is the caliper properly mounted? Sound like something around the brakes may be loose and moving under load (which is a bit worrying!). Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 14, 2016 Member Share Posted May 14, 2016 Agreed.How about getting it up on stands? Usual precautions. Wheels off and inspect the pads, shims, callipers etc and check for marks on the discs. Then wheels on and spin the wheels while someone else applies the brakes. Any catching or strange noises as they do that?Why did you have to fettle the de Dion tube?Jonathan Link to comment Share on other sites More sharing options...
revilla Posted May 14, 2016 Share Posted May 14, 2016 As Jonathan says, also take particular care to check the tightness of anything you loosened or removed. And that includes the wheel nuts! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 14, 2016 Member Share Posted May 14, 2016 An addition: while the wheels are off it would be worth watching the brake action while someone else presses the pedal and pulls the lever.Jonathan Link to comment Share on other sites More sharing options...
DJ. Posted May 14, 2016 Share Posted May 14, 2016 I've never heard anything quite like that. I think I would avoid driving the car until you've got to the bottom of it just in case. Link to comment Share on other sites More sharing options...
Neanderthal Posted May 15, 2016 Share Posted May 15, 2016 Have you checked for spanners? Link to comment Share on other sites More sharing options...
glasgow Posted May 15, 2016 Author Share Posted May 15, 2016 Brake is fine, exhaust is fine, dedion tube needed cutting because of new 13X8" wheels.Car went to Kenney Brown and he had a good check and nothing found. Some minor play in the transverse horizontal arms in the rear suspensions but not to the degree that explain the noise. Kenny's view it is non mechanical and could be something may be inside the chassis tube but nothing of worry.Mystery Link to comment Share on other sites More sharing options...
SM25T Posted May 15, 2016 Share Posted May 15, 2016 Was it Mark that arrived at an event and found a set of Mole Grips clamped to something under the car ? Link to comment Share on other sites More sharing options...
revilla Posted May 15, 2016 Share Posted May 15, 2016 Something rolling around in the boot? Behind the seats? Link to comment Share on other sites More sharing options...
glasgow Posted May 15, 2016 Author Share Posted May 15, 2016 i thought of the the tool bag and the seat belt but still happen with boot empty and seatbelt tucked in Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted May 15, 2016 Share Posted May 15, 2016 Going by the noise that you recorded, I would carefully check the integrity of the weld on the deDion tube ear, it could be a hairline crack fretting under load changes. Link to comment Share on other sites More sharing options...
glasgow Posted May 15, 2016 Author Share Posted May 15, 2016 That is my main concern but no sign of any cracking Link to comment Share on other sites More sharing options...
revilla Posted May 16, 2016 Share Posted May 16, 2016 When you were grinding the de Dion, did you remove the bolted-on ear and the little aluminium cover plate over the end of the tube? Just wondering if while working you could have put anything down (like a spanner) in the open end of the tube then missed it on reassembly, sealing it into the tube where it is now rattling around? Link to comment Share on other sites More sharing options...
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