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clicking/crunching from front kerbside brakes |
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Ped
 
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   Member No: #82
Location: Maidenhead |
Hi guys Loving my C6, first of all. Second of all, I noticed when driving with the window down yesterday (which I rarely do) that there is a brittle clicking/crunching sound coming from the front kerbside wheel when applying brakes at lowish speed, around 12mph downwards. I THINK it does it slightly when not braking, too, and don't think it comes from anywhere else. I called Citroen and they are taking it in on Tuesday to have a look (under warranty) but just out of interest I wondered if anyone has had the same? I just had a friend make the car pull itself in drive @5mph and gently apply brakes before releasing it again and heard it coming from the front wheel. Perhaps it's nothing but worth having it looked at, maybe it's a duff bearing or similar? p.s my car has done 52000 miles and is an 06 Exec. Cheers ped |
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C6Dave
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  Member No: #1
Location: Northumberland |
Worn pads/discs? | ||
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verycleverman
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 Joined: Mar 08 2010 Member No: #65
Location: Northumberland |
Sounds like pads to me. Are they still the originals? I had mine replaced at around 35,000 miles and they were shot. A word of warning, if it's the pads, the dealer will want about GBP 220 to replace them. Best if you do it yourself. Pete. |
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Ped
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Member No: #82
Location: Maidenhead |
Hi guys, I don't think it's the disks as they were fitted new before I bought the car. Wouldn't fitting the pads come under warranty? How easy is it to fit them yourself, is there potential for me to totally balls it up? Cheers ped |
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verycleverman
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Joined: Mar 08 2010 Member No: #65
Location: Northumberland |
If they fitted new discs before you bought the car I would be surprised if they didn't fit new pads at the same time. However, fitting new pads to the front should be relatively straightforward, just like conventional cars. Unusually, for a hydropneumatic Citroen, the parking brake is on the rear wheels so the front pads should be a breeze. The rears, on the other hand, require a special tool to 'wind back' the electric actuators. Research has shown that said tool costs around GBP 550! My local stealer wants GBP 250 to do the job! Pete. |
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Ped
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Member No: #82
Location: Maidenhead |
Thanks for the reply - that mirrors my initial thoughts. I don;t know if it sounds like pads by the noise it makes, it's really more of a sharp cracking sound, almost like the caliper is crackling. I'm looking forward to the diagnosis anyhow and will let you all know!! ped |
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gmerry
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 Member No: #21
Location: Scotland |
Ped and Pete, all good stuff this discussion. I'll be replacing my front disks and pad soon. Disks are worn to service minimum and pads are about 1/2 to 2/3rds worn, but at much lower mileage suggesting car was mostly used for short trips prior to my ownership. Replacing pad alone for £200 sounds a bit steep. I priced pads at about £40/set and Greenstuff at about £80/set. As part of preparation for the pad change, I've flushed out all the old brake fluid and replaced with Castrol Super Response DOT 4 (see my separate post). If you just replace the pads without changing the fluid first, you risk pushing old fluid and debris into the ABS system. I'm not convinced about the rear pad change issues and needing the special tool. The actual rear calipers are completely conventional. The electric handbrake actuator just replaces the manual lever. So yes you will need a manual piston rewind tool but this would be needed even if the car had a conventional handbrake lever. Note that TRW do market some rear handbrake calipers with the electrics incorporated directly into the caliper. The C6 does not have this sort of rear caliper. Also I might be completely wrong and stand to be correctly by anyone who has actually been on the tools, done the job, etc etc. Also worth reviewing the mechanics guide in some detail. Regards all G |
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C6Dave
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Member No: #1
Location: Northumberland |
@gmerry - Be aware that 'Greenstuff' pads don't have the anti squeal coating on the back and nor do most aftermarket ones so you may end up with noisy brakes Use your C4owners Premier Membership to cost a set of OEM Citroen ones from [Dealer 1] before making a final decision. |
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Ped
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Member No: #82
Location: Maidenhead |
Excellent information, thanks. I might be taking the car in on Saturday instead, so will keep you up to date. Didn't notice the clicking this morning (the car 'sleeps' in a nice shady spot overnight) but by the time I had driven to work (about 10 miles) I noticed it coming back, which furthers my assumption of it being brake related as the cooler pads/disks may not have been rubbing as much. I also noticed it very faintly as I drove through a 30 limit without applying brakes on the way home; perhaps the pads were fractionally rubbing on the disks. I checked the service manual. I have a full Citroen dealer history and the front pads were last replaced in 2008 if I remember correctly (will check later as it also quotes mileage) Thanks for your useful comments ped |
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Ped
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Member No: #82
Location: Maidenhead |
Yup, it's going on Saturday. I'll be zooming around in a C1 for the duration which will be fun. Cheers ped |
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gmerry
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Member No: #21
Location: Scotland |
Maybe EBC have uprated their specs, but these C6 pads have the antisqueal backing. I'll still treat these as an experiment in terms of initial bite, dust, wear etc. The OEM pads are of course the safe choice but even these had a bit of squeal. Regards G  |
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C6Dave
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Member No: #1
Location: Northumberland |
Interesting, I got Greenstuff pads for the C4 and they had nothing on the back at all and squealed badly at low speeds/pedal pressure. Maybe they have uprated things |
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verycleverman
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Joined: Mar 08 2010 Member No: #65
Location: Northumberland |
gmerry wrote ... I'm not convinced about the rear pad change issues and needing the special tool. The actual rear calipers are completely conventional. The electric handbrake actuator just replaces the manual lever. So yes you will need a manual piston rewind tool but this would be needed even if the car had a conventional handbrake lever. Note that TRW do market some rear handbrake calipers with the electrics incorporated directly into the caliper. The C6 does not have this sort of rear caliper. Also I might be completely wrong and stand to be correctly by anyone who has actually been on the tools, done the job, etc etc. Also worth reviewing the mechanics guide in some detail. A very good point. I've been scanning through the Mechanics Guide and there is no information on how to change the rear pads. Does anybody have any info on this job, I'm wary of attempting it without guidance. On the C5, for example, the parking brake adjusters on each front wheel have to be wound in in opposite directions. Some basic information would be very useful. I'm about to embark on a trip across Northern France and Belgium at the end of next week and I suspect I may need to replace my rear pads soon after my return. Pete. |
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gmerry
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Member No: #21
Location: Scotland |
Pete, earlier in the year I had severly binding and continuously squealing rear brakes. I removed the rear pads, cleaned up, regreased and also wound in the pistons slighty to ease everything off. So far as the electric brake goes I just disconnected the battery. Now this approach may be entirely sufficient, or I may have just got away with it because the the pads I put back in were the same thickness. I'm inclined to think that all the adjustment for wear takes place in the caliper itself. For instance, with this kind of caliper fitted to other cars it is not necessary to readjust the handbrake lever at every rear pad change. Regards G |
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C6Dave
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Member No: #1
Location: Northumberland |
verycleverman wrote ... ............. I've been scanning through the Mechanics Guide and there is no information on how to change the rear pads. Does anybody have any info on this job, ..... Pete, added to downloads now: - Click Here - Just hadn't got around to it yet  BTW you can get a caliper winding tool from Halfords if you need one. |
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