Noisy front wheel bearing

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WGB

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A few months ago I noticed a faint worn bearing noise and when I changed my brake pads I also serviced both front wheel bearings.

The right front had obviously had some water in it as the bearing races and cages were rusty.

The rust was only superficial and the races were marked but not really pitted.

I regreased the bearings and replaced them and resolved to order a new front bearing set from Autohausaz.com and the noise has continued for the last couple of months with no real change.

Tonight I replaced the front wheel bearings and seal and was suprised to see how much the outer race had deteriorated in a very short period of time.

Wornrightouterwheelbearingrace.jpg

I'm very pleased I changed the bearings and also taking heed of S-class's brake caliper mounting problem I carefully cleaned the threads on the caliper mounting bolts before torquing them up with loctite on the threads.

The 115nM comes up very quickly and it would be very easy to overtighten them.

Bill
 
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Styria

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Hi WGB, I must admit that I have never seen a cone so badly marked. Mind you, when you buy new bearings, the cup should be part of the deal and, if bought in Australia, NON-GENUINE, it is just about a 'Nothing' price. The only contentious issue relates to the seakl itself - if bought from MB, it is fairly unique in its configuration and construction. You do have to ask yourself if after market seals would perform their assigned task to the same degree - I mean, after all, it just needs to keep grease from the braking system.

I have seen S-Class' predicament on the W116 site, but I do not become involved for ethical reasons. Needless to say, it's an unfortunate situation which I would know how to address, but details have not been posted on topklasse. Regards Styria
 

TJ 450

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Indeed it is quite worn and I often wonder how frequently one should repack the front bearings. To be honest, I haven't really looked into it much though.

Anyway, Styria, at the risk of some controversy (on my behalf), S Class has posted on M-100.cc regarding the problem with the brake caliper retaining bore threads in the steering knuckles. I'm sure he would welcome any input as to possible remedies. ;)

Regards,
Tim
 
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