Ok, so the day after flying through it's MOT the car has developed an awful noise from the exhaust from around the cat area.

 

It happens when releasing the throttle after accelerating, both on the move and when stationary.

 

Initially I thought that the cat had broken inside it's housing. The problem is it doesn't happen when cold only after being fully warmed up and particularly after a good blast!

 

Can a broken cat only show these symptoms when hot or could it be something more sinister?

 

Here's a link to a sound file of the noise (hope it works), my phone was held near to the centre of the exhaust by the cats https://vocaroo.com/i/s0a6B5VSL3N6

 

 

I was getting pretty excited about getting back on the road and was really looking forward to my first meet in years at Simply Japanese, that lasted a whole day :angry:

Oh and just to add to the fun I can't get my Datascan to connect to my lap top either!!

I had that problem on a Granade Cosworth

 

I was broken internals on the Cat, but they only rattled when the exhaust warned up expanded and allowed them to rattle !

I had that problem on a Granade Cosworth

 

I was broken internals on the Cat, but they only rattled when the exhaust warned up expanded and allowed them to rattle !

 

Cheers for the reply Tony.

 

I took it into an exhaust specialist today and he said pretty much the same.

 

Time for a decat! I never got round to doing the AIV delete so this will be a good time to do that as well.