SLK has been a bit neglected as I've been working on my Beemers but the SLK finally demands some TLC.
I put in new Bilsteins all round last year and they are excellent but I noticed that the inside of the front tyres has started to wear. No problem I thought, I'll wait until they need replacement and get the alignment done at the same time - should really have had it checked when I put the shocks on so it's my fault.
But lately I've started to feel some judder in the steering from the front when slowing down from above about 40 mph. A look at the discs through the wheels and they are in pretty bad shape so I ordered new rotors, pads, and pins.
Today the new rotors etc arrived - all Brembos.
Before taking off the wheels I did a quick check for play in the bearings - I can feel a little movement on both sides but it feels like its in the rack not the bearings and it isn't much.
The pads are hardly worn at all but the rotors look really shot. I check the run out "by eye" and it looks ok so old rotors off and new rotors on.
Now... The run out is so bad on the right that it's rubbing on the caliper. Rotor off, wire brush and brake cleaner and it better but still doesn't look right.
Rotor off and replace with the second new rotor. Same problem and about the same amount of run out. Two rotors with the same amount of wobble - doesn't sound likely. Using a makeshift jig the rotors look flat but I don't have the kit to do a proper test.
Only things I haven't tried are a) putting the old rotor back on and b) putting a new rotor on the left - (screw needs to soak in WD40 overnight). But the old rotor on the left definately doesn have any wobble at all.
So, anyone any experience in diagnosing this type of problem? Have I been sold two faulty rotors? Can wheel bearings be out of alignment but not show any symptoms of wear?
Any advice would be welcome