Heating of the motor - 2.0TDI - DSG

[aleksandarjon]

Hello,

 

I have a problem with my car - Superb 2.0TDI - DSG - 170HP - 2013.

 

The car heats the motor in the city on some 65-70c. Out of the city, it cools down in a few minutes to 50c and in the cabin, it is quite cold. The thermostat has been just replaced, the situation is a bit better, but it's still far from ideal 90c and to keep the temperature on that level.

The maximum temperature of the oil that was measured is about 62c. I read on the internet that there should be a lot more.

 

Does anyone have a similar experience? Some advice?

[aleksandarjon]

I forgot to mention... outside temperature is about -3c

[FlyingSpanner]

G

 

 

Edited 9 January, 2019 by FlyingSpanner

[aleksandarjon]

I just found out that this could be also a reason... thank you so much for the update! I will keep updated on this topic!

[Bagpuss]

99% certain it's the DSG thermostat. Mine was behaving exactly like yours. Changed the DSG thermostat, and the problem was gone.

Now heats up to 90 degrees and stays there.

 

Parts and cost here in the UK were:

1K0 121 087 AH - Splitter with filter - £9.17 

1K0 121 113 A - DSG Thermostat - £27.55 

 

The splitter with filter probably won't need doing, depending on the age of your car.

From what I'm told, earlier versions of the splitter didn't have a metal gauze filter in them, which could result in contamination getting into the thermostat and hence causing premature failure.

My car (2012 MY) had the filter when examined, so I didn't bother to change the part. If you do decide to change it, you'll need new hose clamps, as the ones on the car are single use.

 

Edited 6 January, 2019 by Bagpuss
Added more information

[aleksandarjon]

7 minutes ago, Bagpuss said:

99% certain it's the DSG thermostat. Mine was behaving exactly like yours. Changed the DSG thermostat, and the problem was gone.

Now heats up to 90 degrees and stays there.

 

Parts and cost here in the UK were:

1K0 121 087 AH - Splitter with filter - £9.17 

1K0 121 113 A - DSG Thermostat - £27.55 

 

The splitter with filter probably won't need doing, depending on the age of your car.

From what I'm told, earlier versions of the splitter didn't have a metal gauze filter in them, which could result in contamination getting into the thermostat and hence causing premature failure.

My car (2012 MY) had the filter when examined, so I didn't bother to change the part. If you do decide to change it, you'll need new hose clamps, as the ones on the car are single use.

 

 

Thank you for this advice! I will try during this week to change the DSG Thermostat and I will update on this topic.

[danutzursc]

Definetely that one!

I have changed mine, both of them!

I changed the main one first time, but it did not help at all.

I changed the other one, and there you go, problem solved !

[aleksandarjon]

The DSG thermostat was the problem! 

 

Thanks for your help!!!

[silver1011]

You've got to love Briskoda!

[aleksandarjon]

I am impressed about this place!!!

[TerryJP]

 I have reluctantly come to the conclusion that neither Skoda garages or Skoda UK technical support have any understanding of this variable temperature problem. I had the very same problem with my car [2013 L and K estate DSG 170 bhp 115,000 miles] following the cam belt and water pump change in November last year. I took the car back to the garage, but since my problem was intermittent, and did not occur whilst they had it, they declared that there was no problem. 

 

I took loads of photos of the Instruments showing low temperatures after hours of driving, and they eventually decided to change the main water thermostat [at my expense] . The thermostat was changed, but the problem remained. I contacted Skoda UK for help to little avail.

 

Eventually after checking on this forum I asked them about the DSG thermostat; they were adamant that this would have no effect, and would not resolve the problem. After months [4] of them refusing to change this part, I said I would pay [again] for the thermostat to be changed. At this point the garage agreed to change it at their expense.

 

The work was done, and surprise, surprise the problem disappeared; my car now warms up much quicker than before, and the running temperature now remains at a constant 90. My fuel consumption has also decreased and I am happy with my car again. I have now driven over 1,000 miles since the work was carried out and I have had no issues with variable temperature, coincidence or what?

[ashfan]

I think I'm having the same problem. A few months back I did a 120 mile trip up the motorway and the temperature gauge only moved when I got stuck in the 25 mile stretch of roadworks on the M6. I know my DSG oil needs changing so I phoned my local dealer (previously Alex Lawrie in Liverpool) to book it in and asked for the DSG thermostat to be replaced at the same time. I got a phone call back from a mechanic who said he'd never heard of a DSG thermostat and went on to describe what they do to service the gearbox and wanted to plug the car in to their diagnostic computer to see what the problem is. I have genuine VCDS and it doesn't show any faults.

 

He also went on to say that "these forums are a waste of space" and implied that "they know nothing". I said leave it with me and I'll find the part number so I can get back to them. Alternatively I might give a VW dealer a ring and see if they know what they are talking about.

Edited 2 April, 2019 by ashfan

[DEL80Y]

5 hours ago, ashfan said:

 

 Alternatively I might give a VW dealer a ring and see if they know what they are talking about.

Why not give an VW independent  that knows what they are doing a phone.

I have seen it loads of times that the dealer change the main thermostat expecting it to fix the problem even though they have come across problem before
Maybe they just dont remember these things

[ashfan]

Thanks Delboy. Unfortunately I don't know of any VW independents where I live. 

After some research I've found someone. I'll give them a ring tomorrow

 

Edited 2 April, 2019 by ashfan
New info

[TerryJP]

Coolant thermostat for DSG gearbox oil cooler.

Škoda catalog no:

1K0121113A

Suitable for:

 

Škoda Superb 2

1.8 TSI 112kW/152PS CDAB 03/2009 → 05/2015
1.8 TSI 112kW/152PS 4x4 CDAB 03/2009 → 05/2015
1.8 TSI 118kW/160PS BZB 03/2008 → 05/2009
1.8 TSI 118kW/160PS CDAA 09/2008 → 05/2015
1.8 TSI 118kW/160PS 4x4 CDAA 11/2008 → 05/2015
2.0 TSI 147kW/200PS CCZA 05/2010 → 05/2015
2.0 TDI CR 103kW/140PS CFFB 02/2010 → 05/2015
2.0 TDI CR 103kW/140PS 4x4 CFFB 11/2010 → 05/2015
2.0 TDI CR 103kW/140PS CLJA 02/2010 → 05/2015
2.0 TDI CR 125kW/170PS CFGB 05/2010 → 05/2015
2.0 TDI CR 125kW/170PS 4x4 CFGB 05/2010 → 05/2015

 

 

This is the part number you require, the part costs £23.42  according to my invoice  and the labour time was 2 hours.

 

as I understand the operation of the item; it allows coolant water to pass through the DSG oil cooler and then to the radiator. It normally operates if the DSG oil reaches a certain temperature and effectively cools it down. What happens if it is faulty, is that water is constantly allowed to go through the DSG oil cooler and to the radiator. The end result is that water is always passing through the car radiator even though the correct engine operating temperature has not been reached. This means that the main water thermostat is by-passed.

 

My DSG thermostat appeared to stick open sometimes when running, or remain open, resulting in the problems described.

 

[ashfan]

That's brilliant, thanks Lawless. At least now I can explain it to the independent a bit better. That's if he needs it of course

[cssuk]

took my local mechanic 20 mins to swap this for me  cost me £27.00 for the part plus a half litre of coolant skoda didnt even know there was a DSG stat until i gave them the part numbers apparantly they have had a couple in with the same issue and been baffled pff, main dealers!

[ashfan]

12 hours ago, cssuk said:

took my local mechanic 20 mins to swap this for me  cost me £27.00 for the part plus a half litre of coolant skoda didnt even know there was a DSG stat until i gave them the part numbers apparantly they have had a couple in with the same issue and been baffled pff, main dealers!

Same here. I decided to go with a local VW specialist when my local Skoda dealer mechanic told me he'd never heard of a DSG thermostat and insisted on scanning for faults. No doubt at significant cost. I told the independent what I wanted doing alongside my DSG service, he did it, problem solved and job done

Edited 17 April, 2019 by ashfan

[Warmonkry]

9 hours ago, ashfan said:

Same here. I decided to go with a local VW specialist

^^^^

Just last week, DSG stat changed......problem solved 

[tecton]

 

Looks like I have the same issue with my 2013 Superb Combi 170 DSG. Radiator developed a leak due to corrosion, and as the car has done 184k got them to change the main thermostat as well. Then it started throwing up warning lights, so had to have the secondary water pump replaced. Got it back from garage yesterday after them having it a week.

On a long drive (150 miles), the water temperature has being going up and down during the course of the journey.

So looks like I need to get this changed.

[tuningmania]

To " @tecton " - Yes, change the "DSG"-Thermostat

[tecton]

Had the "DSG Thermostat" changed. Garage was unaware of this issue or the fix. All working fine now, temperature goes to 90C and stays there.

[Fishlex]

Reading this thread with great interest as I think my Superb 2.0TDI - DSG - 170HP - 2013 may have the issue described. Mine does eventually reach 90 but it takes over 30 mins of motorway driving to get there. How long should it take from cold to get to the magic 90c? I drive like an old woman if that helps with the estimates 🙂

[Warmonkry]

I found that was the 1st sign of something not right, then small fluctuations with lower temps over time. Then finally not getting to 90C on most drives, that was when I had DSG thermostat changed and got back to a quick 90C permanently.☺️

I had to tell my independent garage what to change as they seemed to want to change the main thermostat.

Edited 12 September, 2019 by Warmonkry

[tecton]

Hi Fishlex,

 

Now after having the  radiator, main thermostat, secondary water pump and DSG thermostat replaced. It now takes about 5 miles (@ 50 mph) on my daily commute for the engine to get to 90C.