MOT Class, smoke & Remap 160Multijet

[dunnah01]

A few cheeky questions which I can't find conclusive search results for
1. Looking to get an early MOT so it covers us whilst were away in Europe from August to November. Not due until September but is it OK to have it done early?
2. My MTPLM is 4250kg but is it still a Class IV MOT?
3. Does my 3.0 160 Multijet from 2010/11 have a dpf? There's nothing to say it has so I'm presuming not
4. Could I get a mild remap to 470Nm even if there would be slight visible smoke at MOT time (although still <1.5m-1)

 

[Garfields]

Re number 4 are you sure you want to be putting more torque through the clutch ?
The clutches are not famed for their toughness

 

[pappajohn]

You can have an MOT every day of the year if you want.... But if it fails, it fails regardless of the previous MOT expiry date.
ALL motorhomes are class 4....even the massive 12 ton plus American ones.
Any visible smoke is now a fail.

 

[dunnah01]

You can have an MOT every day of the year if you want.... But if it fails, it fails regardless of the previous MOT expiry date.
ALL motorhomes are class 4....even the massive 12 ton plus American ones.
Any visible smoke is now a fail.

If there's no dpf then some smoke is inevitable so I thought they gradually reduced the limits but not totally sure of dates and requirements

 

[dunnah01]

Re number 4 are you sure you want to be putting more torque through the clutch ?
The clutches are not famed for their toughness

It would be more for driveability, more torque even lower down the revs. I'm comfortable pushing the comfortmatic a bit further given that mileage on a motorhome is much less than a commercial vehicle that the clutch is designed for.

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[pappajohn]

If there's no dpf then some smoke is inevitable so I thought they gradually reduced the limits but not totally sure of dates and requirements

Apologies, you're correct. But as of Jan 2014 the limits are far stricter.

The amended limits to be applied from 20 May 2018 are:

1. First used before July 2008	None turbo	2.5m-1 or plate value if lower
	Turbo	3.0m-1 or plate value if lower
2. First used on or after 1 July 2008	All diesels	1.5m-1 or plate value if lower
3. First used on or after 1 January 2014	All diesels	0.7m-1 or plate value if lower

 

[nicholsong]

Apologies, you're correct. But as of Jan 2014 the limits are far stricter.

The amended limits to be applied from 20 May 2018 are:

1. First used before July 2008	None turbo	2.5m-1 or plate value if lower
	Turbo	3.0m-1 or plate value if lower
2. First used on or after 1 July 2008	All diesels	1.5m-1 or plate value if lower
3. First used on or after 1 January 2014	All diesels	0.7m-1 or plate value if lower

What do those figures mean please?

Geoff

 

[dunnah01]

The MOT smoke testing machine gives the tester a measure of diesel soot particles in the exhaust. The machine measures things like opacity, density and other witchcraft but the convention is to output the results in a value/metre. The MOT regs provide maximum permitted particles in the exhaust based on year of first use/registration and vehicle will pass/fail as appropriate. Manufacturers can also require lower values and these are given on a plate in the engine bay that the MOT tester should use if present.

 

[nicholsong]

Thanks 'dunnah'

Years agomy MOT shop sai before you bring the MH in for test give it a good burn-up on M/way or Dual carriageway.

I drop it down to third gear and rev at 3500 for about a mile.

Since thenI have consistently low emissions readings on test.

I do not know if it is a good idea for exhausts with Cat etc.

Geoff

 

[dunnah01]

Thanks 'dunnah'

Years agomy MOT shop sai before you bring the MH in for test give it a good burn-up on M/way or Dual carriageway.

I drop it down to third gear and rev at 3500 for about a mile.

Since thenI have consistently low emissions readings on test.

I do not know if it is a good idea for exhausts with Cat etc.

Geoff

Most vehicles from 2008 ish onwards have a diesel particulate filter (dpf) to capture the soot particles which are then burnt at a high temperature (600 deg c) during regen and emitted as ash. This is a cleaner solution as the particles are less harmful but does often lead to dpf problems when they get older or blocked with ash that hasn't been emitted down the exhaust.

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[Emmit]

Your No.1 question

If you MOT within a month of the expiry of the MOT you get the MOT to the same date as this year. ie MOT due 15th Sept. Have it done after 15th August and the 'New' date of expiry is still 15th Sept.

It really depends on the actual date. You may be lucky!

 

[Emmit]

Thanks 'dunnah'

Years agomy MOT shop sai before you bring the MH in for test give it a good burn-up on M/way or Dual carriageway.

I drop it down to third gear and rev at 3500 for about a mile.

Since thenI have consistently low emissions readings on test.

I do not know if it is a good idea for exhausts with Cat etc.

Geoff

I did that this morning on my way to the garage.
Got there, "We don't have a booking"
Man behind desk carries on looking towards August.
"It won't be there" says I.
"Where is it then"

"Try the 16th JUNE!!!" and sure enough, there it was.
Just for a change it was them saying DOH! They got it wrong.

 

[2657]

I did that this morning on my way to the garage.
Got there, "We don't have a booking"
Man behind desk carries on looking towards August.
"It won't be there" says I.
"Where is it then"

"Try the 16th JUNE!!!" and sure enough, there it was.
Just for a change it was them saying DOH! They got it wrong.

Except it's the 16th July today

 

[pappajohn]

What do those figures mean please?

Geoff

Parts per million of smoke

0.7 parts soot particles to 1000000 parts air.

 

[Emmit]

Except it's the 16th July today

That's what happens in Lockdown. One gets too far ahead of oneself and the Garage got the wrong date.

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[Lenny HB]

It would be more for driveability, more torque even lower down the revs. I'm comfortable pushing the comfortmatic a bit further given that mileage on a motorhome is much less than a commercial vehicle that the clutch is designed for.

It's the DMF I'd be worried about not that strong at their best, known to fail because of the high torque of the standard 3Lt engine.

 

[jaygee]

A few cheeky questions which I can't find conclusive search results for
1. Looking to get an early MOT so it covers us whilst were away in Europe from August to November. Not due until September but is it OK to have it done early? YOU CAN HAVE IT DONE WHENEVER YOU WANT BUT UNLESS IT IS WITHIN 30 DAYS THE NEW MOT WILL BE DATED 12 MONTHS FROM THE DAY THE TEST WAS PASSED.

2. My MTPLM is 4250kg but is it still a Class IV MOT? YES

3. Does my 3.0 160 Multijet from 2010/11 have a dpf? There's nothing to say it has so I'm presuming not

4. Could I get a mild remap to 470Nm even if there would be slight visible smoke at MOT time (although still <1.5m-1) WE HAD A REMAP ON OUR FIAT 2.8 DIESEL - HAD TO HAVE A NEW CLUTCH WITHIN A YEAR -- EVENTUALLY HAD IT DOWNMAPPED (IF THAT'S A WORD ) AS THERE WAS TOO MUCH POWER & THE CLUTCH WAS ALWAYS SLIPPING.

 

[nicholsong]

I had ours re-mapped some 4-5 years ago and no clutch problems, but I am wary about putting too much strain on the drive chain.

I think sometimes the problems are caused by changing up a gear at too low revs, because one can with the extra torque. I leave the change till the point where the gear almost drops out, just as if one were driving without a clutch, and double-declutching down. One can feel how easy the changes are then.

Geoff