Technical What type of exhaust fastener is this?

[earthman]

For people that first saw this in the 169 section their car has a pipe over pipe fitting, and you can easily just cut the clamp off, I see this post is now moved to the correct post 2012 section


The original posters problem is a quick job with the correct tools





You can properly still use the stud, the threads are protected from rusting by the nut, even though it's nasty on the nut


Getting this part out

View attachment 446660


Not as easy, and a large percentage of the time unnecessary, this part will be generic and with the sizes a replacement found, I wouldn't bother and just use a nut and bolt

If you are going to drill, by hand, you need a split point drill, slow speed and some lubricant, oil is fine

View attachment 446661

The drill on the left will make drilling by hand much easier

I've seen that video before and he's not wrong but my only concern is how well the internals of a cat may or may not cope with the vibes from a air hammer? Hence why I did it manually and very lightly/few blows,.... I was prepared to quit and try another method, thankfully they fell off within a 4 or 5 taps.

 

[vexorg]

They didn't
There no such thing as exhaust grade bolts
Only special shape's or design's for various exhausts

You do get brass and other metal nuts that dont rust.

 

[Chunkynutz87]

Yes, I used a small cutting disk on a dremel, carefully cut a slot into the side of what was once a nut, used a cold chisel and lightly tap to undo,...they just broke away/fell off to be honest.

Which type of gasket did you use the one I have got isn't ad wide so doesn't really fit also a quick one when fitting the new exhaust did you use general nut and bolt I'm thinking of using liquid gasket

 

[earthman]

Which type of gasket did you use the one I have got isn't ad wide so doesn't really fit also a quick one when fitting the new exhaust did you use general nut and bolt I'm thinking of using liquid gasket

Exhaust Gasket | eBay

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I used the type in the link above, that's the shape and material that it's made out of rather that just the thin shiny metal type. In all honesty, I think that either material should do, I did use a light covering of assembly paste on both sides too. The aftermarket exhaust I got is slightly different in size in some areas, so long as the gasket goes over both studs and the 'hole' section doesn't restrict the flow of gases and there's enough to be clamped, you should be OK I would think. I didn't have any nuts and bolts in that size anyway so I ended up buying some heat resistant ones.

 

[vexorg]

I cant remember which of our cars had it, but the front connection looked similar but had a "birdnest" gasket. Not a flat flange, there's a small bit of pipe sticking out the flange that the gasket goes on to. Might have been the fiat, might have been the nissan - they both got a new exhaust about the same time.

 

[koalar]

The gasket will depend on the engine

Online descriptions can be vague and or wrong at best

If you have a part number for the one you need for your engine

Then if you want an alternative look in the parts catalogue, some available on line

Fiat alone have over 10 gaskets that look the same

Take the twinair 500 it has two similar gaskets one at each and of a small section by the CAT, but different parts


Here a small selection of the fiat exhaust gaskets

Buying the right parts will makes fitting easier and better

But you can normally get by with almost anything, it's only got to seal