Manifold to Cat

[Jonny1*2]

Had the car up on the jack the other day as the heat shield was rattling when revving. So tightened it up and blipped the throttle to see if it had stopped (which it had) and noticed that the joint between the manifold and the cat is blowing. Looks really rusty too. Is this normal?

 

[Henry]

the manis are stainless and the cat is mild steel (172 cats are anyway), so it will corrode. it's not really all that big a job to renew the joint on a 182 and you can buy the bits seperately if you just need a new sealing ring

 

[Jonny1*2]

so i don't need to worry about the mani rusting then?

 

[Henry]

it'll still corrode, just at a much (much) slower rate than mild. shouldn't be an issue during the lifetime of the car, unless Renault have used a mikey mouse grade of stainless (doesn't look as though they have)