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Topic: Rear bearings? (Read 1096 times) |
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Chieftain
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Mechanically Challenged with a 24V Cosworth
 
Posts: 491
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Rear bearings?
« on: Apr 17th, 2007, 8:54am » |
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Have a lound permanent drone from the rear, looking at the buyers guide it would suggest that it is the rear bearings.
A/ is there a good way of testing.
B/ should both sides be changed
The noise rises and falls with variation in speed as well.
Any specail tools required to change?
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Bob
if it ain't broke fix it and it will be
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the_boogeyman
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i asked this a few days ago but know bothered to answer, you dont need any specail tools as they are just pressed in, i have the same noise but cannot find out which side it is, as you dont get the wobble until the whole side has collapsed, by then you will need a new hub and bearing, the bearings are about £50 each from any parts shop, fronts are about £30 each.
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Rear bearings?
« Reply #2 on: Apr 17th, 2007, 9:29am » |
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A loud permanent drone could also be down to a worn diff 
I found a good way to check if the bearing is on the way out was too feel the centre of the wheel after being on a run. The wheel with the worn bearing tended to heat the wheel up a fair bit....then again, binding breaks will also heat the wheel up.
If it is the bearing & it is close to breaking up, then a squeak or squeal can be heard when cornering, when that wheel is on the outside of the bend. Also if you just roll the car forwards or back slowly & you hear a kind of creeking noise, then that bearing is deffinately shot & probably the hub as well 
Hope this helps 
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the_boogeyman
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well i have noticed that when i corner mine goes a little quiet, rather then grind.
so far i have had to replace mine every other year
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Rear bearings?
« Reply #4 on: Apr 17th, 2007, 11:17am » |
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MMmmmmmmm not sure now dont want to do work that is not required, did notice yesterday that the noise was consistent, but less at higer speeds.
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Bob
if it ain't broke fix it and it will be
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: Rear bearings?
« Reply #5 on: Apr 17th, 2007, 11:30am » |
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I wouldn’t bank on them being easy to remove, mine were incredibly tight.
Bought an extractor for the inner tracks, but had to grind them off.
It wasn’t that they’d spun & seized, you could still see the original machining in good condition.
Maybe they changed the tolerance on later ones?
Fitting was a bit easier as I could heat/cool parts as appropriate – but still a bit of a struggle.
The best way I’ve found to test them is to follow the procedure for hub removal but don’t undo the centre nut.
You can then pull out the hub far enough to rotate it around the shaft – any roughness is easy to detect, might feel a little stiff due to the grease & seals, but nice and smooth. A side benefit to this is you can clean the ABS sensor ring at the same time.
Dave
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ABS multiplug wheel sensor pins MK IV or MK 20
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Rear bearings?
« Reply #6 on: Apr 17th, 2007, 1:48pm » |
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so i will try the heat test and hope that gives a guide to bearings or diff unless there is a foolproof way of determining 
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Bob
if it ain't broke fix it and it will be
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the_boogeyman
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i must say that as you get faster the noise seems to go away, but is covered by the road noise
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mr._floppy
Junior Member
Posts: 100
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Re: Rear bearings?
« Reply #8 on: Apr 17th, 2007, 6:22pm » |
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Jack up the rear wheel and check for looseness of wheel.
I found rear bearing replacement a bit beyond my DIY skills, with hub pullers, oversized sockets, a professional sized torque bar and other specialised tools needed.
I left it to the professionals 
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Rear bearings?
« Reply #9 on: Apr 17th, 2007, 11:53pm » |
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When I did the bearings on my old Scorp,
I used my arms, legs & most of my body weight as a hub puller......an oversized socket (32mm) was £3.50 from local factors..... used a breaker bar with a scaffold pole slipped over it as a professional size torque bar...... 
& as far as specialised tools go (for fitting the bearings)....A night in the freezer for the old hub & bearings, & the new bearings meant that come morning the old bearings tapped off quite easy & the new ones tapped on quite easy as well ....
.....put them in sealed plastic bags though, otherwise your next beefburger ain't gonna taste quite right
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Rear bearings?
« Reply #10 on: Apr 18th, 2007, 7:23pm » |
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Well tried the hot test today and r/h/r seems warmer than l/h/r so tommorow will jack car up and chack for rim rock to confirm, also though a slight squeak going round corner on the side I think is affected. More later
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Bob
if it ain't broke fix it and it will be
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the_boogeyman
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well i changed my n/s hub today but its still droning
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macroy
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White 24v Ultima Cosworth Estate
Posts: 207
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Re: Rear bearings?
« Reply #12 on: Apr 19th, 2007, 4:21pm » |
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I have found that noises are very deceptive.I had a very bad knock coming from the front nearside.The fault was the front offside anti-rollbar bush.Roy.
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Rear bearings?
« Reply #13 on: Apr 20th, 2007, 1:54am » |
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on Apr 19th, 2007, 4:12pm, the_boogeyman wrote:| well i changed my n/s hub today but its still droning |
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Time to check the diff out then
Have you checked the oil level in the diff....un-screwing the rear plug with a 10mm allen key & putting your finger in the hole. If your finger has oil on then the level is fine, if not, then it needs a top up.
I use EP90 Hypoid gear oil & plenty of it, because my diff has a leaking pinion 
As Macroy says, it is difficult to precisely pin-point a noise.
If it is the diff that is droning, then you could try driving along with the back seat folded down & have someone else sitting next to you listening to the noise.
If you both agree that it is coming from the rear & in the centre, then it's a good chance that it could be the diff
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Chieftain
Full Member
Mechanically Challenged with a 24V Cosworth
Posts: 491
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Re: Rear bearings?
« Reply #14 on: Apr 20th, 2007, 9:58am » |
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another low noise is directional tyres, which will give the same noise as on a L/rover.
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Bob
if it ain't broke fix it and it will be
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tintin
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I'm a YaBB newbie!
Posts: 592
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Re: Rear bearings?
« Reply #15 on: Apr 20th, 2007, 11:26am » |
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my diff makes a noise, only after its "warmed up" after 30-40 miles, and only noticeable on the motorway at higher speeds. i would describe it as more of a whine than a drone though, quite high pitched. was like that when i got it, and isnt getting any worse.....
im waiting to see what happens next
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'95 Cosworth Ultima
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jimhumphries2@hotm
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Re: Rear bearings?
« Reply #16 on: Apr 28th, 2007, 10:59am » |
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ive got the problem noise coming from passenger side back.had it for months now doesnt need any distance for it to start.
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jimhumphries2@hotm
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I'm a YaBB newbie!
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Re: Rear bearings?
« Reply #17 on: Jun 11th, 2007, 2:12pm » |
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sorry i havent replied lately but ive been in hospital.nothing to do with the car i hasten to say
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