C5ALIVE Forum

C5 Help => C5 Support => Topic started by: kamilb1998 on 14, March, 2012 - 20:44:04

Title: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 14, March, 2012 - 20:44:04: Hi guys,

My C5 has developed a regular (appears to happen with one revolution of the wheel - so happens more often when going faster and vice versa) sqeaky groan from somehwhere aroound the rear axle when I'm 'coasting' with the motor off or pedalling. I have had a look and nothing appears to be out of place/broken. I've re-adjusted the rear offiside wheel bearing and greased the nearside one and it's made no difference. Any ideas?
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: Karl on 14, March, 2012 - 20:56:12: There is an additional bearing set attached to the rear axle found inside the black circular casing that holds the rear brake components. This bearing set is a friction fit on the end of the axle.

I'd be tempted to see if that is the culprit & needs replacing. It can be a bit of a niggly job coz you need to extract the rear axle from the c5 to get at the bearing and remove it. A friend of mine at a local garage used a bearing press to seperate the axle from the bearing.

At the other end of the axle there are some roller bearings , giving them a good grease might help as well.
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 14, March, 2012 - 21:04:24: Quote from: BooBoo on 14, March, 2012 - 20:56:12
There is an additional bearing set attached to the rear axle found inside the black circular casing that holds the rear brake components. This bearing set is a friction fit on the end of the axle.

I'd be tempted to see if that is the culprit & needs replacing. It can be a bit of a niggly job coz you need to extract the rear axle from the c5 to get at the bearing and remove it. A friend of mine at a local garage used a bearing press to seperate the axle from the bearing.

At the other end of the axle there are some roller bearings , giving them a good grease might help as well.

Thanks, I'll have a look over the weekend.

It's been in constant use since my birthday last week and it has covered 60 miles already this week so I wouldn't be surprised if the grease somewhere has worn off.
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: coverman on 15, March, 2012 - 10:36:35: Brake drum out of round?
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: Karl on 15, March, 2012 - 18:10:48: Quote from: coverman on 15, March, 2012 - 10:36:35
Brake drum out of round?
I'd be more surprised to find a c5 rear drum that isnt oval shaped ;D :D
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 15, March, 2012 - 18:18:03: I've covered another 10 miles today and the noise was still there this morning but now it seems to have gone.

There does however appear to be a light irregular 'knock' coming from the bearing in the black brake clamp thingy - but this is only heard with it up in the air and under no load.
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: Karl on 15, March, 2012 - 21:49:52: From what I've discovered in the past, dodgy bearings give more of a "crunchy" sound and feel...still worth taking a look though.
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 25, March, 2012 - 22:48:59: I covered 26 miles today and the noise isn't there anymore. So whatever it was has fixed itself, temporarily at least.
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 21, April, 2012 - 18:19:16: The noise appears to have returned. Maybe someone could have a look at it tomorrow?
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: C5 ENTHUSIAST + RESTORER on 21, April, 2012 - 18:23:02: Hi there Kamilb do you have any earmuffs ...Will see you in the morning ..Bye Chas
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 21, April, 2012 - 18:24:09: Quote from: C5 ENTHUSIAST + RESTORER on 21, April, 2012 - 18:23:02
Hi there Kamilb do you have any earmuffs ...Will see you in the morning ..Bye Chas
;D It's not THAT loud! Just gets slighlty irritating after a while.

See you tomorrow.
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: C5 ENTHUSIAST + RESTORER on 21, April, 2012 - 18:27:04: IT sounds like the bearings are worn out or the cone nut ..But we will take a look at it in the morning ..see you bye Chas
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: Lancealot on 21, April, 2012 - 20:01:07: I wish I was there with you all, post some pictures. Have a good day.......................

:( :( :( :( :( :( :( :( :( :( :( :( :( :( :( :( :(

Lance
Title: Re: Sqeaky groan from rear when coasting or pedalling
Post by: kamilb1998 on 23, April, 2012 - 15:48:32: Chas had a look at this yesterday and greased the rear roller bearing in the cog that goes on the axle and the noise appears to have gone away now.