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Date Name Message
29/11/2005 20:44:07   Simon   I have just replaced the front pads on my friends 95 estate (genuine nos pads.) now fitted the car emits a strange friction sound and the rims get hot after driving a very short distance. The calipers were difficult to push back in but eventually did retract.
Is this due to the calipers not being used to such a thick friction lining, and will it eventually go, or will the wheels catch fire?
Any thoughts or suggestions gratefully recieved. I thank you all in anticipation  
29/11/2005 21:54:25   john wyatt   Sounds like the caliper/s need rebuilt, some times the brake will completely seize up and wont let the car move, I am saying this from bitter experience, could try and give the car a real good drive with frequent brake use to try and free them up a bit but this will only put off the inevitable.  
30/11/2005 00:07:42   s   mmmmmmm - oh no!
Thanks for this John.
Strange thing is that they were fine with the old (thin) pads. As mentioned the problem seems to have been started by the aditional thickness of the new pads, while the disks them selves are also new and thus add to the inward retraction of the pistons.
Initially I had wondered if the symptoms were due to putting the pads in wrong - ie wedges around the wrong way but I don't think I have done this incorrectly.
30/11/2005 04:37:37   Steffan   Simon,

The problem might not be the calipers. Check the soft hydraulic lines before rebuilding the calipers. If the car has OEM rubber lines and they are old, they may be closed up inside. When you step on the brake pedal it may still push fluid through, but the caliper will bind upon releasing the pedal. This would also make it more difficult to push the piston back when replacing the pads. If the rubber lines are bad, consider replacing them with teflon lined, stainless-steel braided lines. See my posts to Glenn Humphreys for two sources for brake parts.

30/11/2005 07:34:32   Richard   You will also find that replacement discs are thicker than the original spec items. I have measured a few in the past.
If you got the pads in ok there should not be a problem from this.  
30/11/2005 21:40:10   Alistair   Could be the surface of the pistons are badly corroded causing them to bind. No an issue when the corroded part of the piston is out of it's cylinder. Did you clean up the pistons properly before pushing them back in?  
30/11/2005 22:54:07   s   Nice one Alistair - I think that you have it there. Guess what I'll be doing tommorow ;)  
01/12/2005 09:14:33   john   If you dont have specialist grease for the piston use some brake fluid on the piston as lube to get the piston moving in and out.  
01/12/2005 10:42:22   bloomberg   try swapping the half used pads from your green car with thiner discs and putting the new pads in that. so the brown car has thick discs and thinner pads and the green has thick pads and thinner discs,  
04/12/2005 21:52:43   srv   Transpired that the lack of anti-squeel shims and new pads bedding in were the root cause :)  

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