A few days ago i noticed a high pitch whistle coming from my engine.. when i got it up on a ramp i noticed it was coming from the cat... but there is no rattle, loud noise or change of exhaust sound. Does anyone know what this could be? ... and if i should be worried about this?

The thing nearest the cat, i.e. the turbo, possibly?

The cat must have caught a bird.

 

 

 

 

 

 

 

 

 

 

 

I'll get my coat.

might sound obvious but it isnt blowing around the cat is it ? failing that probs turbo as mentioned above .... there was a thread not so long ago and after a couple of secs most peoples turbos whistle on tick over 

my turbo whistles on tick over.... mine pumped? or what was the outcome if u can remember lol?

my turbo whistles on tick over.... mine pumped? or what was the outcome if u can remember lol?

 if i remember rightly the other thread ended as thats just how they are lol mines defo done it for atleast 2 year 

that settles my mind a little haha cheers

Mines whistled for the past 20000 mile

Resently its went back to quiet mode haha

:S

my turbo whistles on tick over.... mine pumped? or what was the outcome if u can remember lol?

Thats not your turbo, its the egr valve iirc. At idle your turbo shouldn't be doing anything.

so...could this be a knackered cat?

so...could this be a knackered cat?

 

 

More likely to be a leak somewhere IMO or possibly noise transmitted from the turbo.

 

If it's the cat bird thing they're cheep, cheep.

 

<wanders off donning coat>

 

J.

Sounds more like an induction leak if it started suddenly, check all your pipework and joints very carefully.

Looks like boost pipe leak strikes again

boost leak even though its coming directly from my cat? ive had it on the ramp and its definetly the cat.

The cat must have caught a bird.

 

 

 

 

 PMSL. I've just noticed this and nearly choked on my coffee!

 

 

 

 

 

 

I'll get my coat.

boost leak even though its coming directly from my cat? ive had it on the ramp and its definetly the cat.

so, sounds like you have a slightly corroded catalytic converter, get a mate to cover the tail pipe with a thick rag for a second and you may be able to see where it's leaking.