Not sure if new, or entirely accurate but: New MOT rules 20/05/18

Temujin · 25 Apr 2018 at 20:20

Just saw this on the incredibly reliable DriveTribe about new MOT rules being brought in.

Not that i drive one anymore, but particularly interesting regarding DPF modification/removal which i think is quite popular in Diesel tuning? Apparently it's an automatic failure on cars > 06 if it has been tampered with!

x-st · 25 Apr 2018 at 20:32

Somewhat better source -
https://www.gov.uk/government/news/mot-changes-20-may-2018

Nasher · 25 Apr 2018 at 20:38

From rumors I've been hearing, basically if you can see any smoke/soot coming out of the exhaust on a diesel it probably means it's going to fail.

Akagi · 25 Apr 2018 at 20:39

Only if it was fitted with a DPF I think?

[TW]Fox · 25 Apr 2018 at 20:43

Nasher said:
From rumors I've been hearing, basically if you can see any smoke/soot coming out of the exhaust on a diesel it probably means it's going to fail.

Great news.

Nasher · 25 Apr 2018 at 20:43

Yea but also it can be other things which will cause it to fail on emissions.

Akagi · 25 Apr 2018 at 20:47

All diesel's should be scrapped unless they are classic BMW's or Mercedes'.

Mysterae_ · 25 Apr 2018 at 20:52

I wonder if the garage will stop you from driving it away if it fails under the 'dangerous' category.

It does say on the gov.uk website that MOT fees won't increase but I'd think they will with the extra checks.

[TW]Fox · 25 Apr 2018 at 20:52

Acme said:
All diesel's should be scrapped unless they are classic BMW's or Mercedes'.

A classic BMW diesel?

Akagi · 25 Apr 2018 at 20:56

[TW]Fox said:
A classic BMW diesel?

Yes. Like an E30 324D/324TD, E28 525D/525TD or a pre-face E34 525TDS.

The former 4 weren't available in the UK though.

I may also include some old Cummins' diesels in my list of cull exceptions, because they sound awesome.

jpaul · 25 Apr 2018 at 20:56

Nasher said:
From rumors I've been hearing, basically if you can see any smoke/soot coming out of the exhaust on a diesel it probably means it's going to fail.

+1 that's great ... scope for vigilante dashcams ?

tom_nieto · 26 Apr 2018 at 06:54

Nasher said:
From rumors I've been hearing, basically if you can see any smoke/soot coming out of the exhaust on a diesel it probably means it's going to fail.

Great! Although good luck getting a taxi in Birmingham!

[TW]Fox said:
A classic BMW diesel?

+1 The world of “classic” diesels will be a dark place where nobody should ever venture.

Fusion · 26 Apr 2018 at 08:20

akaFonzie said:
Not that i drive one anymore, but particularly interesting regarding DPF modification/removal which i think is quite popular in Diesel tuning? Apparently it's an automatic failure on cars > 06 if it has been tampered with!

Unfortunately a sizable number of people with removed DPFs have "friendly" MOT testers.

MooMoo444 · 26 Apr 2018 at 08:26

Nasher said:
From rumors I've been hearing, basically if you can see any smoke/soot coming out of the exhaust on a diesel it probably means it's going to fail.

Hopefully will reduce the number of toxic clouds you get in your face whenever someone in an older diesel tries to floor it.

adolf hamster · 26 Apr 2018 at 08:48

i've always wondered about the clouds business, how come every diesel i've owned doesn't do it despite them all definately falling in the category of "dirty" diesels (ie no dpf)

[TW]Fox · 26 Apr 2018 at 08:51

The way to fix diesel is to get tough on smokey old crap not terrify the public into hanging onto the old rubbish instead of buying modern cleaner examples.

paradigm · 26 Apr 2018 at 09:08

adolf hamster said:
i've always wondered about the clouds business, how come every diesel i've owned doesn't do it despite them all definately falling in the category of "dirty" diesels (ie no dpf)

I've only owned one non-dpf'd diesel (2002 E46 330d), and it used to dump clouds of black smoke when you dropped a couple of cogs and nailed it. Pretty certain there's a photo of the car when @NickXX owned it, smoking out the start/finish straight at Donington.

Jez · 26 Apr 2018 at 09:15

My only non DPF diesel (Leon 1.9TDI 2004) used to smoke like crazy under load too....

By comparison my E350 (DPF) Mercedes doesnt at all.

Akagi · 26 Apr 2018 at 09:22

My Octavia didn't smoke much. Probably didn't have enough power to push the soot out of the exhaust.

DereksDontRun · 26 Apr 2018 at 09:28

there was a post on here about it a while ago: https://forums.overclockers.co.uk/t...st-coming-into-effect-from-may-2018.18809169/

it's good news, but I'm not sure how much it will change... It's been a mot fail (since 2012) to remove a cat, and plenty of people seem to pass their mot with a "friendly" tester, so I can't see how this will be any different. Not to mention the more and more things that are expected to be visually checked or tested in the same time frame means more chance that something will get missed?

Saying that, I can see this annoying/stinging people that buy a 2nd hand diesel that a previous owner has removed the dpf - they're oblivious of the dpf removal, but get a mot fail and decent bill to replace.