Anyone know what size this bolt would be? I need to get this knuckle off and the rear bolt is pretty rounded off so I’m just looking to cut through it as it is sliding a bit in place so I should be able to get it out from there no problem. Was looking here and I’m not sure I see it listed.
I am pretty sure it’s #14 [N 90924103] on this diagram (21 on the link you sent) though there are three variations for that bolt so I would confirm this with your VIN when ordering.
Ed
Ed - appreciate it and thanks for that diagram it appears to be much clearer on this particular part. You wouldn’t happen to know of part numbers for bushings on the rear of that lower control arm would you? I’ve been struggling to find those as well.
Big one (outer rear): [8E0 505 203 D] on the knuckle from that same diagram.
For the inner ones, the part is not identified and it seems they want you to buy the whole arm. I did find these:
But you would have to contact them to confirm. I also found some links to a Chinese set (Meyle) but I could not confirm they were for our chassis.
Ed
Any thoughts on why this new nut, part #28 from that 7zap link above [ N 10106402], looks so different from the nut on the bolt I cut off? The old nut looks like it has been machined and has this little collar on it. I also can’t seem to get any wrench on it which I thought was just due to it being in a tight space. But even now with it out a 23mm is just slightly too big and a 22mm won’t fit on it. I tried standard sizes as well and nothing. I also can’t see any revisions for this new nut and at this point I’m a little apprehensive to use it.
Was that for bolt 17 or 14 off that diagram?
Ed
The nut on the left just looks like one that the captive washer has become detached from.
Thanks for the replies guys.
@lilejk that nut is #28 and should be for bolt #14 off the diagram unless I’m reading it wrong. The part number for that nut (N 101 064 02) appears the same as the nut listed for bolt #17 though - and again no revisions that I could see or find elsewhere.
@eng92 I don’t think that is the case here for 2 reasons: 1.) A washer had fallen off where I cut the bolt head off and 2.) I can’t fit a wrench around this nut. The new nut is 18mm just like the hex end of the bolt. I could be wrong here but it seems like an entirely different nut which is why I’m scratching my head.
I agree with the comment about the nut being different. The new nut is a self locking nut but the old nut does not look like it is (unless it uses something different for locking other than the plastic insert on most self locking nuts). The shoulder piece may be as eng92 has said, where a washer would be in the position of the shoulder sticking out from the nut.
Has that bolt ever been off before?
Doing a little googling I see this:
https://www.123spareparts.co.uk/spares-search?keyword=n10106402
which makes no sense since you are looking at 22 or 23 mm wrenches. My kid is driving my S6 but once I get his A4’s boost leak fix I will be able to crawl under and see what the stock bolt is.
Ed
Lucky kid. If you were able to pop underneath there and take a peek I’d be curious as to what you find. I’m the 3rd owner of this car (Corporate fleet for about 2 years and then the second owner for about 10) and as far as I know this bolt has never been removed - it certainly doesn’t look like it has been. I guess the biggest question I have right now is can I use the new (N 101 064 0) self locking nut to put things back together?
A self locking nut is a self locking nut.
Why a wrench doesn’t look like it fits is beyond me. But assuming you can hold it, and the threads match, I don’t see why you can’t use it.
When the car is back I will take a look.
Ed
I took a look at the ones on my 07 tonight and they are the same unusual nut. It is actually octagonal (8 sided). Blurry picture below taken with side camera on borescope. It was too close to be able to focus properly.
There must be an oversized hole in the lower control arm that the shoulder on the nut fits into to centre the fastener.