tsm/motor said:
My z4 E89 is due for vanos bolts on Dec 6th,this is the second attempt as in August the parts didn't arrive,I don't want it done to be honest as it seems that oil leaks and 'not running well' is common after the work,ive had the car since 2010 and never had a problem.It's a gut feeling that I don't think I should ignore......anyone?
I think the problem here is that if anyone has had "oil leaks" or "not running well" then they really should be taking it back to the dealer to sort and not just post on-line and do nothing about it.
Let me just explain a couple of things associated with the Vanos bolts going wrong.
At best, if they go loose, you'll have issues with running problems. They may only be minor issues, but you'll notice them.
At medium, if a bolt comes out it'll drop into the sump, which will need extracting.
At worst, if a bolt comes out and is not in the sump, it could be stuck in the engine somewhere, and this means, probably, a new block.
So, yes, it's worth doing. It may never go wrong, but considering it's free and any issue the dealer causes will be rectified free of charge there is no downside. Oh and you'll have a courtesy car during this period, I managed to have a brand new 5 series for a few days, which was nice
