DPF REMOVAL - Vauxhall Antara Forums
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post #1 of 14 (permalink) Old 4th November 2017, 16:35 Thread Starter
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I see a lot of publicity warning people about the perils of DPF removal, mainly being put about by those who have something to gain by selling after-market DPF cleaners , additives etc. 1,188 vehicles have been caught without a DPF since 2014
when ministers introduced a visual check into the MOT, according to figures
obtained from the Department for Transport (DfT) by the Guardian,.

Somehow this figure of 1,188 has become exaggerated to 1,800 and most headlines say "Thousands caught with DPF removal etc". A London City spokesman says he estimates the true figure to be "hundreds of thousands if not more".Really???? It's not as if he's totally unbiased either, is it?

So I'll run with the official figures for a minute: 1.188 found since 2014. That's when they introduced the requirement for a visual examination for the presence of a DPF during an MOT for those vehicles which were fitted with one from new. SO out of 30 million plus vehicles on Britains roads, 1,188 have been caught. My calculator runs out of zeroes to calculate exactly what miniscule percentage of vehicles it is but they would have you believe it's a serious problem, an epidemic even.

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post #2 of 14 (permalink) Old 4th November 2017, 23:37
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I bet 1187 of those 1188 are Antra's

My wife says that I never listen or something like that !
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post #3 of 14 (permalink) Old 5th November 2017, 10:45 Thread Starter
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Nice one Chris, never thought of that

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post #4 of 14 (permalink) Old 5th November 2017, 12:34
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If the plan involves gutting the DPF and re-installing the box would this be picked up on an MOT inspection? See curlytops' posts from earlier this year. They read very well.

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post #5 of 14 (permalink) Old 5th November 2017, 15:22 Thread Starter
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No it would not be easily detected on an MOT inspection, Dulac. They're
trying to create a climate of fear that they will catch you out during
the MOT and you will be in line for £1,000 fine and possible further
charges when in fact they have no method of detecting it. Maybe on the
older vehicles where the DPF is halfway along the exhaust system and can
easily be inspected all the way round, they could see a weld seam where
it had possibly been cut open, the filter element partially removed /
drilled out / whatever but most modern diesel cars have short-coupled
DPF's where it's located right next to the exhaust manifold. But a weld
seam on a DPF proves nothing, many DPF's have weld seams on them from
the factory. Also, on my Antara, the DPF is wrapped in a protective heat
shield muff covering the
whole DPF. The MOT is an inspection only, they are not allowed to strip
down parts of the car for examination.

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post #6 of 14 (permalink) Old 5th November 2017, 16:24
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Can they not see any change in the emissions with their probe?

My wife says that I never listen or something like that !
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post #7 of 14 (permalink) Old 5th November 2017, 17:47
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I can see a day when they will be able to remove the shield .the government will think of something

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post #8 of 14 (permalink) Old 5th November 2017, 20:08 Thread Starter
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They can't tell from the MOT whether a DPF has been gutted or not. They run a smoke test on diesels (opacity test) and I've heard from some MOT testers that pre-DPF cars have been cleaner than those with DPFs. If your engne is emitting black smoke then a DPF won't stop it.The DPF is a crude piece of equipment, just upscale of
placing a white sock over your exhaust and in America EPA training methods did include
having students place white socks over car exhausts and measuring the
results.

It's ironic that the DPF can cause a vehicle to emit black smoke because of the excess fuel injected during the regen etc so the filter that's supposed to be reducing pollution is actually causing the pollution.
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post #9 of 14 (permalink) Old 6th November 2017, 10:20
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This what a member posted in April this year after having the DPF innards removed and the engine re-mapped:

Regarding the DPF, today the Antara sailed through its MOT at my local
garage with no problems. In fact the emissions were well within the
range they should be to pass. So to sum up... I had no problems with
anything after the removal...all lights on dash worked as they
should...was averaging approx. 6 mpg more... went like a steam train and
passed its MOT.

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post #10 of 14 (permalink) Old 6th November 2017, 11:28 Thread Starter
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Quote:
Originally Posted by Dulac
This what a member posted in April this year after having the DPF innards removed and the engine re-mapped: Regarding the DPF, today the Antara sailed through its MOT at my local
garage with no problems. In fact the emissions were well within the
range they should be to pass. So to sum up... I had no problems with
anything after the removal...all lights on dash worked as they
should...was averaging approx. 6 mpg more... went like a steam train and
passed its MOT.
I'd forgotten about that thread Dulac (and it was only at the beginning of this year!) so thanks for the reminder. Link for the whole thread if anyone is interested is http://www.antaraownersclub.com/forum/dpf-removal_topic2988_page1.html
Curlytops said that, along with the DPF removal, his remap gave him an increase in power of about 34 bhp as well as an improvement in fuel consumption of around 5 or 6 mpg. Shows the penalty of compliance with the regs.

I wonder how he is doing with his Audi Q3
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