MOT woes, and where to buy parts

UK forum for general and technical discussion about the Z3 roadster
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Rodent
Joined: Mon 22 May, 2017 07:34
Posts: 35

  Z3 roadster 2.2i

MOT woes, and where to buy parts

Post by Rodent »

Hi all,
My z3 2.2 sport failed the mot today. I’ve been putting off a few jobs but todays news means I need to bite the bullet and gets a few jobs done. Other than needing new sill covers, I also need suspension arms for all four corners, and probably front ARB drop links too. Can anyone recommend where I can get reasonably priced replacements? The car has 140k on the clock so I can’t justify genuine parts? I see an eBay site selling full front wishbone kits for £118, has anyone tried these, the feedback seems ok on ebay? (It seems like parts for the 4 cyl cars are everywhere, but the 2.2 6-cyl not so easy to find parts?)

Another concern is that the car also failed mot for ‘exhaust lambda reading after 2nd fast idle outside specified limits’. I don’t see any exhaust leaks, but I do sometimes feel a slight misfire, and a local garage said these engines are prone to misfiring due to sticky hydraulic tappets. Has anyone come across this? I was hoping a new air filter, spark plugs, cat cleaner and an oil additive might be enough for now?
Thanks in advance,
Will
bowei001
Joined: Mon 13 Apr, 2009 16:38
Posts: 215

  Z3 roadster 2.0
Location: Sudbury

Re: MOT woes, and where to buy parts

Post by bowei001 »

There is no reason not to use these kits as they are made to a standard and should be OK (Febi & Meyle ones are a bit dearer). If you have access to a press you can use your old front arms and press in new ball joints which are available quite cheaply from some well-known manufacturers. If you go down the press-in route it is worth fitting Z3M rubber mounts to the wishbone brackets as they don't have slots in the rubber and give better stability (I think that they are only available from BMW). The rear arm rubber kits from the likes of Febi or Mahle work OK. If you are having to do the rear beam bushes, Febi are OK but these bushes are a bit of a fight to get out and replace without taking the beam out. Make sure you use a rubber lubricant that hardens when it dries (like P-80 THIX) when pushing in rubber bushes. As far as I can see from looking at RealOEM, all these suspension parts are the same for all models of Z3 (and some bits fit other models as well).
I used a Meyle kit but pushed in Z3M bushes at the front and dropped the beam and used either Febi or Meyle(can't remember which) at the back and everything has been OK since 2018.
Rodent
Joined: Mon 22 May, 2017 07:34
Posts: 35

  Z3 roadster 2.2i

Re: MOT woes, and where to buy parts

Post by Rodent »

Thanks bowei001 that’s a good shout, I didn’t know that Febi and meyle offered these parts. I don’t have a press so I think I’ll change the whole arm on both sides for Febi or meyle.
The rear trailing arms seem hard to find (unless going for super expensive bmw oem. It looks like people often shot blast and repaint the trailing arms and just fit new rubber parts?
I probably need to refurb my diff casing and rear beam too, but maybe that can wait until winter.
I’ve ordered plugs, air filter and Cataclean to try and address the emissions issue. Bit worried about the misfire though….
I’m hoping to get the old sill covers off this weekend, to check how the actual sills look, before I order any new panels.
Thanks,
will
bowei001
Joined: Mon 13 Apr, 2009 16:38
Posts: 215

  Z3 roadster 2.0
Location: Sudbury

Re: MOT woes, and where to buy parts

Post by bowei001 »

Hi Will,
Yes, I had our trailing arms sand blasted and then fitted new rubbers and they were fine. Whilst I had the rear beam out I had a cam adjustment kit welded onto it so that I could adjust toe-in and camber if needed. If you take the diff out it might be worth replacing its rubber bush whilst you are at it.
It is all do-able (if you have a local sand blaster) but just takes a bit of time.
Good luck with it.
Ian
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