One of my front wheel bearing was shot, so I hade a new wheel bearing pressed into the hub on a Skoda dealer and then got back to the garage to replace it. I misread the info (I must have seen the wrong car, I think, it was not in here) and tightened it to 70 nm and started to drive. About 400-500 meters, and the noise came. I got back and parked for a few weeks (vacation time, and this is just a spare car when we need two), and then I started to find out what was wrong. I discovered the process of preloading with tighteing to 70 (some say 90) nm, turning the wheel 90 degrees, loosening the hub nut 180 degrees and then tightening to 50 nm. But the noise is of course still there. It sort of sounds like a weak helicopter sound. So did I damage the bearing beyond repair and have to press in a new one, or is there something else I can do? I replaced the front spring at the same time, but I don't really belive that it has anything to do with it.

The process is tighten to 220nm with no load on the wheel.

Slacken by 180 degrees, rotate wheel at least 90degree, tighten to 50nm + 60degree overtighten

 

I just did both of my front 

 

If you didnt tighten to start with they may not be seated fully in to start with.

 

 

It does sound like the new bearing is shot, they are very sensitive to any internal lateral movement (from being loose) or friction from being over tight, hence the multi step instructions. 

All you can do is run it until it either goes quiet or starts to develop some movement.

Check it regularly and hopefully you should get some mileage out of the spend before another new one is needed.

fwdnewbie, I guess the error we made was to tighten to 70 and then testdrive it a few hundred meters. :( So I think it's damaged.

 

GreenOcty1, it's not beeen overtightened with 70, but I guess driving it a few hundred meters with 70 may have damaged it. We actually gave up and delivered the damned thing to a small garage (ran my my father's neighbour). Too much time has been wasted on this. :( The car is about to be sold in two months, so it must be fixed.

The bearing was shot again. The first workshop probably didn't press it correctly into the hub, or the bearing was bad. Impossible to know. There's a new one there now of another brand, and that works.

Its the torquing of 220 that is supposed to finally seat the bearing in the hub.

 

I've got toprans in mine which are about as cheap as they come 

 

As long as the process is followed they'll be all good this time