shunn

hi all,

i have a 2003 focus st170 and have descovered a very anoying sound when the car reaches around 2500 rpm. the only sound i can describe it as is a 'scratching' noise rather than the usual rattle i have read about.
I have recently had a new CAT fitted and recently i had a look and it seemed to be coming from the flexible pipe just after the CAT. just wondered if anyone else has had any similar problems?

cheers

pani_k

iTrader: (1)

If it was blowing then I would assume it'd be doing it more audibly at higher revs but I'd check to make sure it isn't leaking from there.

rst cabbie

id look at the heat shields common fault on the st170

st3v3

cat heat shield for def!

if you blip the throttle, at about 1800-1900 rpm it rattles then as the rpm drops again the rattle goes away-cat heat shield.

shunn

just been to the garage and they said its the flex pipe, 120 quid, yet they are 35 quid on ebay. looks like it just bolts on so mite have a go myself

shunn

has any1 ever fitted one of the flexible joints or has any advice about fitting one?
it is the part just after the CAT.

James

the brackets between the cat and the block often break

shunn

yes i had to get one of the brakets welded when i had a new CAT fitted.
as i have had a new CAT fitted the joint between the cat and the flexible joint shouldnt be too hard to split, but the joint at the other end of the flexible pipe looks very corroded