Rattly cat - Will it fail the MoT?

mattyprice4004 · 9 Jul 2009 at 10:10

Morning all,

Noticed a nasty rattly cat on my car, will this affect the MoT at all? Was looking at them on eBay, and a new one starts from £40ish.

Cheers!

kaiowas · 9 Jul 2009 at 10:11

The rattle won't be cause for failure, if it's no longer doing it's job and you can't meet emissions then it will fail.

Janesy B · 9 Jul 2009 at 10:13

Yup, as long as it isn't leaking and it does the job its nothing to worry about. It may be the one of the mountings has perished and needs replacing.

Mr Jack · 9 Jul 2009 at 10:21

I'd get yourself a new cat regardless, mate, a rattly cat means there are lose fragments knocking about in it, they can easily block the exhaust completely causing more serious damage. Happened to me in my old car, and I lost the brakes on the M6.

mattyprice4004 · 9 Jul 2009 at 10:21

Going to take it in to my local for a pre-MoT checkup so I can whip the spanners out if needsbe.

If I tap the cat I can hear the insides rattling around

loltim · 9 Jul 2009 at 14:23

Mine rattled, I think Tomnbk noticed it at the last meet. I've just replaced it with a de-cat pipe and kept the cat for MOT time.

Have you considered a de-cat pipe? They offer good gains on turbos don't they? (after the MOT obviously)