Porsche Enthusiasts Club Forum

It is currently Thu Mar 28, 2024 8:57 pm
Classic Line Insurance


All times are UTC [ DST ]




Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Sun Aug 30, 2020 1:05 pm 
Offline

Joined: Fri Jul 06, 2018 8:54 am
Posts: 148
Location: Bretagne, France
TIPEC membership: 0
Hi team!

So been doing a few miles now and have noticed a low down "wub, wub, wub" noise from the front tyres. This is most noticeable on smooth flat roads. It doesn't happen all the time and lasts for 2 seconds or so. I have read that this low down 'wub" noise is to do with the tyres being out of round or maybe not balanced.

So I rotated the fronts with the rears and went for a spin. The sound was just there and to my untrained ear it seems to be coming from the rear. I have inspected the tyres and they look ok to me but clearly something is adrift.

I have, by chance, a tyres shop almost opposite me that can balance the tyres, if that was the issue. The tyres are Falken Ziex ZE914. They are four years old and have only done 8,000 with me and have loads of tread left. The tyres were professionally balanced 4.5 years ago

Any thoughts?

Thanks,

M

_________________
924S - 1988 Alpine White


Top
 Profile  
Reply with quote  
 Post subject: Re: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Sun Aug 30, 2020 5:33 pm 
Offline

Joined: Tue Nov 19, 2013 11:48 am
Posts: 2729
Location: West Essex
TIPEC membership: 0
Drive it get them hot and they should return to round, I would get the tyre shop to put them on the balance machine, you will soon see if they are out of round

Parked up for ages on the same spot on the tyres will make them go temp out of round, drive it more

_________________
1992 968 Coupe Cobalt Blue
1985 Honda VF1000 F2 Bol D'or In Silver
2013 A4 177 TDI Quattro Ibis White
2013 Volvo XC60 D5 brilliant car


Top
 Profile  
Reply with quote  
 Post subject: Re: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Sun Aug 30, 2020 8:06 pm 
Offline
Moderator
Moderator
User avatar

Joined: Sun Nov 04, 2007 8:43 pm
Posts: 12645
Location: Chatham, Kent
TIPEC membership: 4190
Waylander wrote:
Drive it get them hot and they should return to round, I would get the tyre shop to put them on the balance machine, you will soon see if they are out of round

Parked up for ages on the same spot on the tyres will make them go temp out of round, drive it more

This, try pumping them up to 45-50psi for a few days, don't drive it like that & then let them down to their proper pressure & take it out for a spirited drive. Plenty of bends & braking to get some heat into them.
I had one pair that despite multiple heat cycles never did go round & ended up swapped for a new pair. I have had them freeze in the past & do this as well.

_________________
Jim

http://tipec.net/region_southeastlondon.php

2018 Mitsubishi Outlander PHEV
2005 Porsche Cayenne S Now sold!
2000 Jeep Grand Cherokee Now sold!
2010 Mazda MX5 Mk3.5 2.0 Sport Tech
2000 Porsche Boxster S SOLD!
1987 Porsche 944 2.5


Top
 Profile  
Reply with quote  
 Post subject: Re: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Sun Aug 30, 2020 8:08 pm 
Offline

Joined: Fri Jul 06, 2018 8:54 am
Posts: 148
Location: Bretagne, France
TIPEC membership: 0
Thanks for replies..all good info....so, before I chase this issue, is the "wub, wub, wub" noise. Is this an out of round tyre? or something else? Anybody here experienced this?

Thanks,

M

_________________
924S - 1988 Alpine White


Top
 Profile  
Reply with quote  
 Post subject: Re: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Sun Aug 30, 2020 10:16 pm 
Offline

Joined: Tue Nov 19, 2013 11:48 am
Posts: 2729
Location: West Essex
TIPEC membership: 0
Wheel bearings can make that noise, but you swapped front to back and the noise moved

They might be out of square as well as round

_________________
1992 968 Coupe Cobalt Blue
1985 Honda VF1000 F2 Bol D'or In Silver
2013 A4 177 TDI Quattro Ibis White
2013 Volvo XC60 D5 brilliant car


Top
 Profile  
Reply with quote  
 Post subject: Re: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Tue Sep 01, 2020 8:46 am 
Offline

Joined: Sun Jun 20, 2010 1:17 pm
Posts: 55
Location: Ettington, Warwickshire
TIPEC membership: 5374
Hiya.
Just to add my pennies worth - I've had this not on my 944 but on two Ford Kuga's and a VW Passatt.
Mine was from tyre wear - not detrimental, but called blocking - where the edges of each block of the tyre tread pattern sharpens at the edges as it wears.
If not directional tyres - putting left to right and vice versa will help - whilst putting right front to right back won't.

As soon as I changed mine around or replaced the tyres, the noise disappeared instantly.

Regards

_________________
Barry

944 S2 Cab in the fastest colour since 2008
Now with a stable mate - 996 Turbo in Lapis Blue


Top
 Profile  
Reply with quote  
 Post subject: Re: Wheel noise - "wub, wub,wub" 924s '88
PostPosted: Fri Sep 04, 2020 9:31 am 
Offline

Joined: Sun May 10, 2020 9:34 am
Posts: 16
TIPEC membership: 0
Have you tried checking the transaxle mount?


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 30 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group