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Up Topic C1 Information / Repairs - Faults & Fixes / Strange tinkling noise
- - By p.gill Date 08.08.21 11:20
Hi C1ers
Several weeks ago I started to hear a sort of rattling sound, sounded like one of the fasteners that hold the trim to the exhaust was loose, a tinkly/ rattley sound, checked for tightness all ok, still tinkly rattley, thought something might be loose in the exhaust, removed it shook it no rattle!
Checked the black coupling plate for tightness all ok, still tinkly, holding the rear tyre tried shaking the engine, no rattle, lifted the back wheel off the ground still nothing.  I then noticed the abs sensor was partly rubbing the detector ring, something has moved, so I replaced the two bearings in the aluminium plate, the sensor is now the correct gap and NO RATTLE! The bearings appeared ok no roughness in turning them, but they had done 18,000 miles, on removing them a small amount of brown gritty water came out. If replacing these bearings there is a shoulder in the middle, the bearings come out from either side!
Parent - - By p.gill Date 09.08.21 15:05
You need a flame and a bearing extractor to replace these bearings, I’d be happy to help out if you sent the carrier to me.
Parent - - By patc50 Date 10.08.21 08:44
Hi Paul, this is interesting as I've sometimes thought that my exhaust has a loose baffle or something as I've heard a rattle/tinkle sound from that area.  When I get a chance I'll take the exhaust off, make sure it's not that, and if necessary, I'll take you up on your offer of help with bearing replacement.

Parent - - By HelmetHair Date 10.08.21 12:20
First thing to check is the rivets on the rear variator-they rattle when at idle, then stop when you start moving. I've had this too many times to count. I tend to ignore it until I need to get at the belt for any other reason, then switch in with another variator.

(it MAY be the front variator. Its been a while since i had one rattle...
Parent - - By patc50 Date 10.08.21 14:12
Thanks for this - will check that too!
Parent - By HelmetHair Date 11.08.21 12:19
Checked last night. It’s the rear.
With the engine running you should be able to track it down
It’s a plate on the inside of the variator. When it’s in drive there is tension holding the plate right.
At idle there is no tension so the plate can tinkle. Wire wrapping could probably remove the looseness but I don’t recommend that!
Up Topic C1 Information / Repairs - Faults & Fixes / Strange tinkling noise

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