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+--- Thread: Cat for MOT (/showthread.php?tid=22230)
Cat for MOT - Kezzieboy - 16-03-2014
Alright guys, I'm guessing this might be a problem for a few of us since the changes to the MOT guidelines, so I thought I'd start a thread.
So I, like many of you, have decatted my HDi. Unfortunately, unlike most, I didn't just butcher the cat, as I already had a stainless cat back, so I got a stainless decat front pipe.
Now, the new mot regs require a visual check for a cat, which obviously I will fail, so what's the best way of dealing with this? Shall i:
1. Make a dummy cat, with a pipe straight through the middle, and weld in place of a bit which i cut out of mine.
2. Attach a dummy cat to the outside of my exhaust, by cutting it down the middle, and then welding it shut on the outside of the pipe where the cat used to be.
3. Build some sort of front pipe I can take in and out for the MOT, by modifying my current system so it has a flange.
4. Get a full, standard system on the cheap (or borrow one?) and swap it at Mot time.
5. Other
How are you guys planning on dealing with it? Pain in the arse, but somehow it's got to be done.
Cheers fellas.
RE: Cat for MOT - cully - 16-03-2014
i vote other!
slip the MOT tester a beer token
mines running empty CAT as i knocked the centre out
visualy its there
RE: Cat for MOT - Connor - 16-03-2014
Either don't worry about it, or weld a "cat" around your current exhaust
RE: Cat for MOT - Slam Wagon - 16-03-2014
Cable tie a cover so it cant be seen on the day. Take it back off again straight after.
RE: Cat for MOT - Tom - 16-03-2014
Find a better mot station lol...
RE: Cat for MOT - Niall - 16-03-2014
(16-03-2014, 06:13 PM)Tom Wrote: Find a friendly mot station and take a pack of beer
EFA
RE: Cat for MOT - bashbarnard - 16-03-2014
Got told by vosa themselves the other day. As older cars go how did you know it was there as standard can the tester prove it? No has to pass.
RE: Cat for MOT - Poodle - 16-03-2014
Exactly that. ^^^
If you're that worried weld a shell around it. If the tester fails it it's because they're a lady garden, not because the mot guidelines say anything without a cat must fail - because they don't say that.
RE: Cat for MOT - bashbarnard - 16-03-2014
Also 90% of testers won't mind as long as it passes emmisions. If your a diesel your laughing if your car's before 2008 due to a massive amount of smoke aloud .
RE: Cat for MOT - Kezzieboy - 16-03-2014
I've seen the exact notice, it clearly states that a cat must be present.
I would just use a pikey tester, but I like the garage I use, as they're incredibly anal, and they spot the stuff that I wouldn't, so I can sort it myself before it becomes an issue.
RE: Cat for MOT - Connor - 16-03-2014
(16-03-2014, 08:21 PM)Kezzieboy Wrote: I've seen the exact notice, it clearly states that a cat must be present.
I would just use a pikey tester, but I like the garage I use, as they're incredibly anal, and they spot the stuff that I wouldn't, so I can sort it myself before it becomes an issue.
If fitted at time of manufacture, pre 94 dturbos didnt have filters fitted, they can't be expected to be retro fitted
RE: Cat for MOT - Slam Wagon - 16-03-2014
Considering its in the hdi section i would guess we arent talking about pre 94 cars so all will be expected to have a cat.
RE: Cat for MOT - Connor - 16-03-2014
No I was just pointing out that it says all cars must have cats
RE: Cat for MOT - Poodle - 16-03-2014
Isn't this all in relation to dpf's anyway?
RE: Cat for MOT - bashbarnard - 16-03-2014
No cat as standard it states I can take PIC of special notice tomorrow and upload
It states not as states
RE: Cat for MOT - Kezzieboy - 17-03-2014
Nope, cats too poodle.
Either way, that's not the point not here, the fact is that it's now an MOT fail to have a decat on an HDi, so how best to avoid immediate failure?
RE: Cat for MOT - mspdan - 17-03-2014
bloke i use for mots is pretty sound as long as it passes emissions he is okay.
if you moter is anal, i would either put a cover over it or like i did kept my old exhaust with cat, in your case borrow or buy one for mot time
suppose it depends how picky they are mate
RE: Cat for MOT - mattgreene - 17-03-2014
ive mot'd my 306 hdi, on saturday and she passed, with just a mid to back box conversion, no cat, no back box
Cat for MOT - Frosty - 17-03-2014
At the end of the day to all down to the tester
Cat for MOT - Razorback_Rob - 19-03-2014
I'm welding the cat casing off my original downpipe and cat onto my decat pipe. Should pass visuals and smoke test just fine
RE: Cat for MOT - Kezzieboy - 23-03-2014
Only concern with that method is that the cat will be mild steel, whereas my exhaust is stainless, so it'll be introducing some nice corrosion into the system :/
RE: Cat for MOT - Poodle - 24-03-2014
Get a stainless one made then lol.
RE: Cat for MOT - Kezzieboy - 24-03-2014
Can you get stainless cats? Wont they be a bit expensive to buy just to bash the insides out?
RE: Cat for MOT - Poodle - 24-03-2014
So you're buying a real cat rather than having the box welded around the outside? Seems a bit retarded if you're just going to empty it anyway...?
RE: Cat for MOT - Connor - 24-03-2014
Kez find an exhaust place and ask them for a stainless "cat" /drevil
RE: Cat for MOT - Kwik - 14-04-2014
from what i understand from my last test as long as the exhaust is not blowing and emissions are fine it passes. mine had a cat on it but i done a decat and tester said nowt except it's really good on emissions lol.
guess does depend where you go