How's it going everyone I have a 97 jaguar xj6 and I love this car .. I replaced a wheel bearing about 6 months ago for the first time well my brother did and then a couple of weeks ago the new bearing stared to go again and I ha to replace the assembley for the Bearing it's and now this bearing is going again and I'm gonna have my brother replace it again . Please help I love my car and I do t want to have to keep replacing it anyone have any ideas what could be wrong ?

 

Hi,

Best to post in the 'X300' section

Are you taking about front or rear wheel bearings?

Either way I suspect the new bearings were not properly adjusted. Front bearings are easy to adjust. Rears, not so much.

The rears require that clearances be measured and shims added/removed to achieve the specified 'pre-load'. Often new bearings are close enough to the original bearings that this isn't an issue....and they seem to be a bit forgiving anyway. However, if new bearings are being installed without any regard at all to setting them up properly you could be way too loose or too tight....and they'll fail

Cheers
DD

 

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Thank you for your input . It is the rear driver side bearing that keeps goin out

 

These are taper rollers and need to have clearance. The clearance is small, but must be there to avoid the bearings failing. There is a clearance piece originally available in several thicknesses to get the clearance right. I have done them myself, but was lucky as the new bearings did not need a different spacer. Method of checking the clearance is to use a dial gauge, at least that is what I remember. It was 1990 after all !!

 

Fraser, no !

On the earlier IRS ...like your old Series III...set ups the spec calls for a bit of free play/end float. On the later style (like X300) the spec calls for a couple thou *pre-load*...less than zero clearance.

In practice, even though the spec calls for pre-load, they seems to tolerate a a bit of free play pretty well....but I doubt they'd be happy at all with too much pre-load.

Cheers
DD