Hi All,

 

My lovely Skoda Superb L&K 2016 was involved in a car accident last week and my insurance company says it does not make economical sense to repair it, so they consider it as a "write-off".

 

I'm now looking to buy something similar (btw, if you are selling - let me know...)

 

Today I visited a car dealership to look at a L&K 2017 TDI 2.0 SCR 190

While looking at this car and having a test drive, I noticed the smell of diesel exhaust fumes (not inside the car, only outside), as if it was an old diesel van.

There wasn't any black smoke coming from the exhaust, but a bit of white smoke which is usual for colder weather like it was today.

My previous Superb was 110kW/150PS CRLB engine with EGR, and didn't require AdBlue. You would never know it was a diesel because there was no smell coming out of it, honestly.

The car I looked at today, was 140kw/190PS DFCA engine with SCR, which requires AdBlue. The car was serviced by a Skoda dealer for the first two years (last record Nov 2019). Not clear if/where it was serviced between 2019 and 2022.

I do not know if the smell was specific to that car and indicated potential problems with the engine, or whether it is something common for more powerful engines that use SCR/AdBlue ?

 

So, here is the question for Superb MK3 owners with engines 190PS and above - does your car produce any smelly diesel fumes?

 

Thanks in advance

 

Hi, welcome to the forum. That doesn't sound right. Full disclosure - my diesel experience is limited to marine and Gen sets, but I believe white exhaust smoke can be a serious warning sign. 

21 minutes ago, AK-S6 said:

So, here is the question for Superb MK3 owners with engines 190PS and above - does your car produce any smelly diesel fumes?

 

Thanks in advance

 

No, I've never noticed any from mine.

Hi Warrior193,

Thanks

 

Just to clarify - "white smoke" was probably an overstatement, it looked more like steam, but had a strong smell, which I never experienced on my Superb.

 

Could be the smell of the SCR injecting AdBlue?  Sorry I don't know what it would look or smell like in 'action'

Could just be that the car needs a good thrashing after having been shunted around the forecourt for god knows how long.

 

I have SCR and it doesn't smell any different to normal, it only injects a misoscule amount and it doesn't inject all the time

@AK-S6How many miles has it done now,

and how many when 2 years old,

then 3 year old at the MOT?     

 

No record of services after the Skoda dealership ones is something not that great unless the price you are paying is a bargain and you feel lucky. 

?

What warranty you you getting with the car,

and if you end up buying a wrong un are you prepared to through it back to them?

 

Buying an extended warranty will be an issue. 

 

?

Are you going to carry out servicing of stuff you have no record of having been done? 

 

Edited 19 November, 20223 yr by toot

@toot

35K when 3 y.o. at the MOT 2020.

It has done 49K now.

3 month warranty, but i didn't have a chance to read full T&Cs.

 

TBH, I don't think it is a bargain, and this situation with the smell of exhaust fumes makes me think there can be a hidden problem...

 

thanks

 

DPF regeneration?

 

Or does that not happen with Adblue?

6 minutes ago, J.R. said:

DPF regeneration?

 

Or does that not happen with Adblue?

DPF should regen as normal, the AdBlue is for gas emission reduction, so a separate system further down the exhaust system.

No smells at all from mine, unless I get back from a drive and a regen is just finishing, but that’s like a hot metal smell
 

If your gut is questioning it, it might be wise to walk away.

 

You could always do another test drive and see if it’s noticeable again but stop somewhere completely different half way on your test drive as it could have been as simple as parking over a diesel leak

 

Put your finger in the exhaust and smear your finger around, as it has a DPF your finger should be nearly spotless, if it’s really black then your gut should be listened to.

 

Bit strange but I never clean my exhaust and can show you a picture of what my finger looks like after compare if you like (like I said a bit strange haha)

Edited 19 November, 20223 yr by Danoid

They do get a bit smelly as they get older and put on the miles.  That's particularly the case when you first start them up in low ambient temperatures and / or leave them idling.

 

My old Mk5 Golf used to stink and it had 90K+ miles on it.  I noticed that my 47K mile 2016 Yeti 150 TDI SCR was a bit smelly when I started it up the other night, whereas it wasn't in milder weather.

 

Walk past a row of idling taxis and you'll probably notice the same smell.

 

On the other hand I haven't noticed the exhaust on my wife's 2019 Karoq 190 TDI SCR  with 25K miles on it smelling particularly.  

My 2016 2.0 TDI SCR DSG Alhambra smelt like i was parked at an airport with the planes fumes falling out of the sky as they do.

That was after it had done about 30,000 miles and was regening or having a Clogged DPF light on if used on just short local runs for 5 days or so.

5 miles a day for 5 days and that was 25 mpg or so.

On long runs it was a 45-60+ mpg.    After 30,000 miles it was an AdBlue sipper.  Last of the great Defeat Device TDI's. 

 

Sad to think some poor sod has this car after AC bought it at auction with BAC and got it sold about a year later.

Edited 20 November, 20223 yr by toot

On 19/11/2022 at 22:41, varooom said:

DPF should regen as normal, the AdBlue is for gas emission reduction, so a separate system further down the exhaust system.

 

I always thought it was a seperate system but if you look at the components it goes turbo>Nox catalyst>Adblue injector>DPF. The adblue and DPF go hand in hand really as the function of the DPF regeneration actually creates a lot more nox than the car otherwise would without a DPF.

 

On the Euro 6 VAG engines there is a nox catalyst straight after the turbo (but before the adblue injector) which stores the nox at low exhaust temperatures, when the car goes into a DPF regen and cylinder and exhaust temps increase and this then gets converted into nitrogen.

 

During said regen the nox goes throught the roof due to the increased exhaust and combustion tempratures that are helping regen the DPF and this is where the adblue injection comes in to convert the rest of the Nox to nitrogen and water which happens inside the DPF (must be some hybrid catalyst/DPF in cars that have SCR)

 

Source: youtube (so it must be true 😂)

 

 

Thanks @SuperbTWM I was running on a total lack of sleep this weekend gone.

I did sleep in today to catch up 😆

 

My brain was thinking of the AdBlue tank location, but here is the injector sitting just between the two 'cans' of the overall DPF system.