Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Propshaft centre bearing

Post Reply
mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Propshaft centre bearing

Post by mcbutler » Tue Mar 20, 2018 1:59 pm

Hi all,

Anyone ever changed a propshaft centre bearing, car is 2009 23i.....
Mark
Plymouth
E89
35i
Carmine Red
Black leather

del_tl1000r
Member
Member
Posts: 186
Joined: Thu Apr 06, 2017 10:51 am
Location: East Kilbride

Propshaft centre bearing

Post by del_tl1000r » Wed Mar 21, 2018 3:19 pm

Didn't know propshafts had a centre bearing. What problems are you experiencing with the car?
23i
Msport seats
CDV deleted
LED halo bulbs
LCI side repeaters
Stubby
Brushed stainless exhaust tips
Focal speakers
Pioneer amp
Kicker sub
M4 style wheels

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Propshaft centre bearing

Post by mcbutler » Wed Mar 21, 2018 5:29 pm

Got a warbling whine at 1400rpm in second gear. Gearbox has been striped and inspected, all perfect. New DMF/clutch cover/clutch plate/release bearing. Centre mount is just the next thing on the list......
Mark
Plymouth
E89
35i
Carmine Red
Black leather

del_tl1000r
Member
Member
Posts: 186
Joined: Thu Apr 06, 2017 10:51 am
Location: East Kilbride

Propshaft centre bearing

Post by del_tl1000r » Wed Mar 21, 2018 6:26 pm

Nightmare! How much has all that cost? I would have thought if it was a bearing you would be getting the noise in every gear but just at different revs :?
23i
Msport seats
CDV deleted
LED halo bulbs
LCI side repeaters
Stubby
Brushed stainless exhaust tips
Focal speakers
Pioneer amp
Kicker sub
M4 style wheels

User avatar
GuidoK
Lifer
Lifer
Posts: 3171
Joined: Tue Aug 17, 2010 1:37 am
Location: all over the place

Propshaft centre bearing

Post by GuidoK » Wed Mar 21, 2018 6:56 pm

If the gearbox has been stripped and inspected, surely they looked at the centermount, propshaft itself and the diff?
IT would be strange to look for such a specific problem in a component that takes 6-8hours work (if not more) and not spare the 30min to look at the other parts?

BTW to look for a whine (certainly at such a low speed) you dont need to remove the propshaft center bearing. You need to listen with a stethoscope on the various components where the whine is coming from.
Otherwise your list will become a very expensive list.
Z4 3.0i | ESS TS2+ | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | fully polybushed | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers | Sachs Race Engineering clutch

Capa
Member
Member
Posts: 250
Joined: Mon Oct 16, 2017 4:02 pm
Location: Southampton

Propshaft centre bearing

Post by Capa » Thu Apr 05, 2018 1:04 pm

I'm about to tackle a similar problem on mine... Watching with interest...
E86 | Stratus Grey

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Propshaft centre bearing

Post by mcbutler » Thu Apr 05, 2018 2:33 pm

I had the box removed by my local indy and sent to a specialist for stripping and analysis £495 including transport. They said it was perfect (81,000 miles) and unmarked. They would be happy to sell it with a 12 month guarantee.
I replaced the DMF as it had play in rotation and laterally, along with a full clutch kit all by LUK £800 fitted including the removal and refitting of the box.
The centre bearing was examined, nothing there you can feel or see but of course the pressure you can apply is nothing compared to what the engine puts it through.
The gearbox guys listened to the recording and they said centre bearing, apparently the harmonics in the drive chain change all the time as a result in engine speed, gear selected, road speed etc so many variables and the whine was only ocurring across a range of around 150 revs 1400 - 1500ish. As a result it can only happen in one gear.
Its a lot better with the new clutch and DMF but still not as quiet as I would like.
First step is to drain the oil hot and check it for contaminants, don't believe the sealed for life yarn, no engineer would back that up as a good idea.. Then I would in hindsight change the centre bearing regardless, not expensive. Then clutch/DMF if the whine is still there and you are sure its not the diff.
NOTE - DON'T LET THE MECHANIC RUN THE CAR IN GEAR. IF THE WHEELS ARE NOT ON A ROLLER AND ARE FREE SPINNING IN THE AIR IT CAUSES ALL SORTS OF PROBLEMS AND ERRORS. SO MUCH SO THEY HAD TO DO A HARD RESET TO BRING MY CAR BACK TO LIFE....
Mark
Plymouth
E89
35i
Carmine Red
Black leather

Post Reply