F430 Fine White Grit In Engine Compartment

From your catalytic convertor?

 

Rear muffler coming apart

 

Could be your headers failing and blowing heat shield material around ..very common in the f430 ..do you know if there were replaced ?

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Insulation from factory headers or exhaust. They use a white insulation that disintegrates with time. Just brush it away or replace muffler/headers with aftermarket.

 

They all had the issues - 2nd Gen was supposed to be better but not immune

 

The silencer box has white insulation and then a stainless covering, it starts to breakup and comes out as dust. The later cars still have manifold problems caused by the expansion being constrained. The Capristo expansion brackets help a lot.

 

This. I’m sure you have a crack somewhere on the muffler. Likely at the seam.

 

The cats are also insulated with the white stuff, and a sheet metal on top; you can see it at the temp sensor flange. check cats too.

 

I did some thorough investigation using cameras. My problem was seeing white smoke/dust under hard accelerating inside the engine bay. It turned out to be the white powder coming out of the muffler pipe connections. Not harmful at all, just annoying. After a good hard track session it's usually gone for a few 1000miles. But comes back at some point.

 

Myself and a couple others had the muffler outlet pipes welded shut. Keeps the white powder in and was only $100.

 

I your headers have a cracked then the exhaust coming out of the crack could break down the insulation closest to the crack and eventually come out from under the shield. Look at your undertray from above, is the white powder settling below the headers or under the muffler?

 

My factory 360 muffler box was putting out white dust after I purchased my car from a collector. It had sat up for a couple years.

After 1 yr of driving weekly it stopped puking powder.

just an fyi… it might go away like mine did.

 

Jrosenthal, when I was searching about this a few months ago, this thread below was super helpful. At the time, the youtube link in the first post showed the white powder coming out when revving the engine (like in the picture), but alas it's been changed to "private" now. The Aldous Voice link in that thread is great too.

https://www.ferrarichat.com/forum/threads/2006-f430-white-dust-bad-headers-or-bad-weld.516180/