Exhaust rattle

[Deleted User]

Wig wrote: »

Get someone to sit in driver seat to gently accelerate and release and repeat.

You get a rag and put it over the exhaust tail pipe to block the gases and release.

If there is a leak you may hear it as you block the pipe.

alternatively you lie in the floor, and get your assistant to block the tailpipe and release while you listen i.e. leave the car on idle only.

Thanks, I'll try that.

I'll not be happy if it is blowing. 2 years since installed and only 10K miles and still looks new.

Wig

My experience of fitting a brand new Bosal this wekend has shown me that these new exhausts are not very well made.

The Bosal has minute leaks on the box at the crimped seam, where the seam joins the endplate of the box. They will all be like this, and this minute leak will eventually lead to a blowing in a few years time. It seems they just [strike]can't[/strike] don't make the aftermarket ones air tight.

How do I know this?
When fitting, my car was reversed onto ramps so the car was at quite a steep angle, after idling for a while the box started dripping water at the front edge, on closer inspection a tiny bubbling could be spotted at the seam/endplate join.

When the car is on the flat it doesn't happen, -at least not noticed it yet.

When the pipe is hot it doesn't happen, maybe it evaporates before it can drip.

They could use tubular steel to make the boxes with then there would be no crimped seam. They also seem to use seamed pipe, that is pipe made from a flat sheet rolled and seamed along the entire length, again if they used proper pipe there would not be this weakness.

mikey72

Thinking about it, when I used to work in the motor industry, if it wasn't good enough for the oe supply chain, it went into the aftermarket. The holes will soot up though.

gilbert_and_sullivan

About the only aftermarket exhausts i've found to be any good are Eberspacher, as sold at GSF (might have been Eurocarparts, one or the other), they seem to last nearly as well as OE, no leaks, reassuringly heavy and fit properly.

s_b

watching how its made on quest was a revelation that they dont actually weld the boxes but just fold them
of course many boxes last longer with a little hole drilled in them so condensation can get out rather than lanquish and rot
think marina or punto as examples