Air escaping sound when accelerating (exhaust)

[Alexandru.Edward]

Hello everyone.
I recently changed intercooler O rings because my car has an air escaping noise and I thought that was the problem, as I said here: https://www.the75andztclub.co.uk/for...d.php?t=284802

But the sound it's still here, exactly the same. The O rings were a bit enlarged, but they did not required immediate change.

It can be the flexi pipe or the catalytic converter?
On the engine undertray shield it's some black soot right where the flexi pipe is.
Photos:
HERE
The sound it's present only when the car it's on load.
If the catalytic converter it's bad, can I just cut it down and replace it with a pipe?
Thanks in advance!

[slovcan]

Originally Posted by Alexandru.Edward

Hello everyone.
I recently changed intercooler O rings because my car has an air escaping noise and I thought that was the problem, as I said here: https://www.the75andztclub.co.uk/for...d.php?t=284802

But the sound it's still here, exactly the same. The O rings were a bit enlarged, but they did not required immediate change.

It can be the flexi pipe or the catalytic converter?
On the engine undertray shield it's some black soot right where the flexi pipe is.
Photos:
HERE
The sound it's present only when the car it's on load.
If the catalytic converter it's bad, can I just cut it down and replace it with a pipe?
Thanks in advance!

I suspect you are correct about the flex pipe (more likely than the cat, I'd say). The flex pipe is prone to cracking and leaking if stressed too much during a clutch change or bad engine mount (or changing an engine mount). Can yo put the car up on jack stands or ramps and get under with it running and get a friend to rev it a few times while you feel for the exhaust to blow out with your hand?

Cheers,
Glenn

[Alexandru.Edward]

Originally Posted by slovcan

I suspect you are correct about the flex pipe (more likely than the cat, I'd say). The flex pipe is prone to cracking and leaking if stressed too much during a clutch change or bad engine mount (or changing an engine mount). Can yo put the car up on jack stands or ramps and get under with it running and get a friend to rev it a few times while you feel for the exhaust to blow out with your hand?

Cheers,
Glenn

Right after I changed the whole clutch kit including the master this sound appeared. So I think that's the problem. I'll do that, thanks you!

Here's the sound.
VIDEO