Cat Bypass Pipe + MOT

thesurfbus · Post by **thesurfbus** » Tue Apr 09, 2013 8:03 am

MOT is due in the next couple of months, and was wondering whether I would need to put the Cat back on for the MOT.
Consensus on the Rover 25 forums seems to be mixed, might just stick it in and see what happens.
Engine is a standard S1 K series (with obligitory Exhaust, CAF and 52mm TB).

Thanks Doug

Dominic · Post by **Dominic** » Tue Apr 09, 2013 10:49 am

I thought think you would need the Cat in place for an MOT.

tut · Post by **tut** » Tue Apr 09, 2013 11:20 am

Not necessarily as the under tray does not have to be taken off, so parts underneath can not be checked.

N3 has just returned from its MOT without a CAT, normally it would not pass without it, but the tray was mentioned on the certificate. MOT garages can differ in their outlook substantially.

tut

Sanjøy · Post by **Sanjøy** » Tue Apr 09, 2013 11:22 am

From my K series experience you will need it else a friendly garage and a case of beers on the front seat.

BiggestNizzy · Post by **BiggestNizzy** » Tue Apr 09, 2013 11:29 am

Without a cat the K-series will not pass as at idle.

Thats why I have to put my cat back on every year for it's MOT

philthy · Post by **philthy** » Tue Apr 09, 2013 12:01 pm

Some K series engine struggle to pass with it fitted

sendmyusername · Post by **sendmyusername** » Wed Apr 10, 2013 3:48 pm

Mot Garages now wont remove anything for inspections as then they are liable for the work.
I got a few "cannea see" comments on my exige.
Provided it passes the exhaust test, you should be ok, unless the db level from the exhaust is excessive then they may have an issue with it for another reason ?
Best just put the car in, and see, worst case is a re-test.
My test garage always try their best to 'help' things through the emmissions...

thesurfbus · Post by **thesurfbus** » Thu Apr 11, 2013 7:33 am

I heard on the radio this morning that you can get your cars emmisions tested for free at Asda Stration today, so might pop round and see what they say.
Exhaust isn't too noisy, and if anyone asks it has a 'sports cat'.

thesurfbus · Post by **thesurfbus** » Thu Apr 11, 2013 7:52 am

Emissions Testing dates and locations http://www.westlothian.gov.uk/media/dow ... ngCalendar

sendmyusername · Post by **sendmyusername** » Thu Apr 11, 2013 10:08 am

Cool, let us know how you get on, whether it was a pass, near pass, or if the transport police arrest you as soon as you roll off the tester .

thesurfbus · Post by **thesurfbus** » Thu Apr 11, 2013 11:18 am

Will Do.

Going to go tomorrow after work.

thesurfbus · Post by **thesurfbus** » Mon Apr 15, 2013 8:37 am

I had my car tested on Friday, and it failed.
CO was 0.7% and HC was high but still a pass @2500 rpm.
Looks like I will need to refit the CAT to convert the carbon monoxide and unburned hydrocarbons to CO2 and water vapor!

Scottish Elises