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[tommy mac]

I  have just spent the morning checking the car (2.2i) prior to the MOT on Tuesday and having removed each wheel I came across a previously unnoticed problem.  Both rear tyres have worn very badly for about two inches on the inboard edge of the tyre.  The nearside tyre had worn so badly that there were two one inch long tears in the outer wall.  Other than this the tyres seemed to have worn ok. It's new tyres tomorrow but what are the guesses as to what caused this uneven wear?   I should point out that the tyres were not main brands but budget tyres I have used before with no similar uneven wear.

Tom

[Webby the Bear]

Is this a case of rear camber being waaaaaaay out?

[chrisgixer]

Is it lowered? Deliberately or by a fault? Busted springs maybe?

[TheBoy]

How long have you had the car? If fairly recent, maybe previous owner had them on the front...

[tommy mac]

No, car has not been lowered and the springs are ok. Tyres were new about 10k miles ago and the problem was not apparent then .  The wear is so bad on these edges I thought the tyres must have been catching something on the car itself but they are not.  Strange that both sides have similar wear.  I'llget the old girls through the MOT and follow up with an allignment check.

Thanks for the ideas.

Tom

[TheBoy]

Is the car sitting low at the back>

[chrisgixer]

What's the rear ride height? Top of wheel arch to floor should be in the region of 675mm iirc.

Certainly sounds like a geometry issue. Either just needs set up or there is a fault. Check subframe bushes. Donuts under door jacking point, blocks rear of subframe as in the fit new rear springs guide.

[tommy mac]

Top of wheelarch to floor is 695mm on each side. The car appears to sit as I would expect with no sign of a sagging rear (!).  With new tyres the back end does feel better planted but looking at the condition of the ones that came off I'm not surprised.  I'll see what the outcome of the MOT is tomorrow then I'll check the rear suspension as suggested. The Omega certainly provides a long-term learning experience.

Tom

[chrisgixer]

Set up is a common theme on bigger cars. There's more to it that just tracking as the motor trade would generally have you believe.

If they've not been on the front and there's no faults then full geometric set up is advisable, or the new tyres will go the same way.

...and if paying for set up. A thorough check if the front steering and suspension is also advisable first.

[ffcgary1]

It could also be a problem at the front of the car causing your tyre issue on the rear but you need to take the old tyres to WIM chesham so that they can see the problem and get it set up properly, it needs full ego and they are the only people to trust to get it right.

[ffcgary1]

sorry a bit of a typo on the above post, it should read needs full geo not ego, sorry bout that.

[tommy mac]

Cheers guys lots of good advice here.  The car failed its MOT on one trackrod end and the battery not being held in place by the proper clamp - the latter a new one on me especially as the normal wiring holds the battery rock solid.   After the retest I asked the tester if he had noticed anything of concern at the back end and he said that the only thing he had noticed was that the front suspension felt rather 'soft'  but that was all.

I'm going to keep a close eye on that tyre wear and but the geometry experts in Chesham are a long way from here (we have just moved up to Cumbria) - anywhere in the North with a good reputation for steering/suspension?

Tom

[ffcgary1]

laings in bolton i belive are trusted and use WIM settings, worth a call i guess. but that is quite a trek to chesham i agree
I am sure  other members will confirm or debunk that.

[CaptainZok]

http://www.nigellangsgarage.co.uk/

[TheBoy]

Nigel langs just north of Mancs get mostly good reports here, but make sure they don't use GM settings (that are wrong for older cars)