Strange "Rasping" noise at 3000rpm on 182. Can anyone offer advice?

[Chrisyb1981]

My 05 182 has developed a rasping noise at 3000rpm. It sounds like its coming from the passenger side somewhere between the footwell and engine bay.

Its almost as though there is a piece of paper trapped in the airflow which vibrates at a certain volume.

Please note there is no change to power.

Can anyone suggest what it might be?

 

[raggit]

cat to centre section flange blowing would be my guess..

 

[-Leigh-]

A common fault on the 182 is the join blowing where the cat joins the down pipe.

 

[Chrisyb1981]

Is this expensive to fix?

 

[-Leigh-]

Is this expensive to fix?

Well, you can buy the joint iirc, but if it's started damaging the cat, it will need fixing.

You don't want to have to buy a new cat from Renault, trust me.

 

[Chrisyb1981]

Is it an easy job for a normal garage to do and roughly what is the cost?
Also how long can it be left before it does some real damage?

 

[Dunn]

bit of fire gum for £3 will sort it
i hate the sound of a blowin exhaust
best thing to do is first thing when you start it up when its cold
look underneath and see if theres any leakeges of fumes ull spot em straight away

 

[-Leigh-]

Is it an easy job for a normal garage to do and roughly what is the cost?
Also how long can it be left before it does some real damage?

Replacing the joint is easy and quick fix for a garage. It might fix it for years, it did on my 182.

 

[Chrisyb1981]

thanks for your all your helps guys..!!

 

[Tom]

I replaced mine with a 405 backbox flange, welded back to the original cat.

Worked perfectly.

However since then i have removed the CAT entirely and swapped it out for a pipe.

It could also be a heat shield come loose, check those.