Can you identify this nut?

Could be from a lot of possible locations as that size and type nut is pretty popular on the 328. And, the fact that it has yellow marking paint on it pretty much screams "Ferrari". If I were you, I would keep looking until I found where it belongs (belonged) ----- nuts that big and with locking elements are NOT used in "trivial" locations!!!!!

 

Also, it is possible that the nut belongs no where --- anymore.... It could be that someone dropped it during a previous service, couldn't find it, replaced it with another nut, and this one has been rattling around loose waiting to finally fall out of its hiding place.

 

Check the passenger side of the engine, lots of 19mm locking nuts are there on the timing belt covers.

 

BTW, in addition to critical things like suspension components, I would definitely check the timing belt covers, timing belt tensioner pulleys, and the A/C compressor mountings ---- they all use nuts about that size.

Also, the bell housing and motor mounts are worth looking at too.....

 

And, the reaction rod / brace that connects the rear cam cover (engine) to the rear body bulkhead....

And, have fun This should keep you busy for a while

 

YEL ---

Sorry for the duplication... We must have been typing at the same moment!

 

What he said. I'm into that area right now with the cam belt covers off and the AC compressor out and that nut looks like several sitting in parts bins on my workbench right now.

 

Great idea for a practical joke.

 

My first thought also -- AC compressor mount. Curious to see where it ends up being from.

 

when my car was being serviced in the shop I stopped by to see how things were going and notice onb the passenger side of the engine there were lots of nuts that the machanic put yellow paint on,I asked why and he said then he knows which ones were torqued already,maybe this is one that didn't

 

Nothing worse than putting something back together and finding left overs.

BTW, nice avatar brother.

 

When I took apart my (very used) 308 i found a couple nuts and a washer perched on various frame members and gussets, telling me the previous owners had dropped these items during various tuneups and did not bother to find them.

I have had to deal with a couple very serious F.O.D. (foreign object damage) issues at work, and it can be maddening worrying about what one errant nut or washer can do in the wrong place.

17mm nuts with self locking features do no back out, even if they are not torqued. If they are turned to engage the nylon ring but not torqued, they still cannot back out. if you found it on the driveway, it's because it was dropped, not because it backed out from vibration.

 

I was going to say, that looks like yellow marking paint used on suspension componentry... Good thing you found the problem. Could have been a real big issue at a track day coming off the main straight into Turn 1...

It would be interesting to know what caused the rear fork of the wishbone to fail....? I've seen mechanics raise a ferrari on the wishbones....right in the middle of the wishbones no less...that's just asking for a failed component.

 

I hope the chassis mounting points for the wishbones are still ok. Maybe it's the picture, but there seems to be a lot of corrosion (rust) on your suspension.
Good luck, you are lucky you caught this before something really bad happened!

 

As a kid I didn't think it was that big of a deal to have left over parts, till I lost the front wheel on my bike!

 

whew - good thing you found that beffore something happened.

Question - how do you know it's 19mm?
I'm looking to replace all of the wishbone nuts on my QV while the suspension is apart. One place I took one of the nyloc nuts to (Fasten-all in Milwaukee, a quite well stocked/knowledgable place) said it was 13mm, and that the automotive industry has a monopoly on this size so they couldn't get it. 13mm hardware is also missing from McMaster Carr's site, and another place said the same thing.

This weekend my mechanic took one of the wishbone bolts and using a thread guage showed me that it matches up with 12mm/125 pitch thread (which are readily available).

19mm is pretty large - are you sure this is right?

thanks!
Kurt

 

He's probably describing the size of the external hex drive (rather than the thread major diameter).

 

Those forks were the subject of a recall. Yours are covered with Dinol from the factory and were never done.

Replace all the front forks. Your was a classic failure and the reason for the recall.

 

Anyone who has any business servicing these cars should be inspecting those every service. It was a common failure, it was the subject of a recall and a very real safety issue. I cannot believe with how well known a problem that was that there is still a car out there with the old forks.