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Date: Sat, 8 Apr 2006 04:39:58 +0000 (UTC)
From: Craig's Saab C900 Site <c900nospam.apana.org.au>
Subject: Re: C900 front calliper clonk


"Al" <alistairdorenospamo.com> writes: >OK I have the classic clonk on my front callipers when I stop and >reverse up and stop again. I know it's a "feature" of the C900 but >it's getting worse. >What exactly is worn, and is it worth spending well over =A3100 to get >it fixed. My specialists did the brakes for me recently as part of the >MOT work, and the clonk was gone, but 3 months later it's gradually >returned and is worse than ever. If you take off one of the front wheels and look at the caliper, you'll see that there is a u-clamp holding a strangely-shaped spring against the backing plate of each of the brake pads and there is also a wire 'butterfly' spring as well. I've got a pic at this URL: http://www.classicsaab.net/gallery2/main.php?g2_view=core.ShowItem&g2_itemId=598 which, if you look past all the cobwebs (!), shows the u-clamp, and the main spring. The 'butterfly' spring isn't really clear but it's there too. Those components are designed to prevent or at least reduce that 'clonk' that you get. The kits to replace those components are low in price from places like Parts for Saabs, etc. and it's a very cheap way to help overcome the clonking. I've heard those parts called 'anti-rattle' components as well. I've been told, but have not really proven, that if you replace the brake pads with new ones the clonking isn't as bad, but that's probably more related to overall wear of the brake caliper components and how well lubricated the sliding yoke of the caliper is. Regards, Craig. -- Craig's Saab C900 Page at | Craig's Classic Saab Workshop - Sydney .au http://lios.apana.org.au/~c900 | http://www.classicsaab.net and other URL's Email: c900nospam.apana.org.au | For Saab 99/C900/9000 Enthusiasts World-Wide! Alternate: saabonautnospaml.com | Web-forums, galleries, library, links, etc.

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