Cold running

[teacake]

Hi there

 

I've just bought a 2015 Superb 2.0 PD170. The water temperature seems to stay rather cool - it takes 20+ minutes to shift off the bottom of the gauge, and then struggles to reach 60-70 degrees. If I get on the motorway it'll stay around 50 degrees. If I sit in traffic for a long time it will hit 80-90 degrees, but then when I start moving again it will drop to 60 degrees or lower once more.

 

So far, I've had the thermostat, the coolant temperature sensor and the secondary water pump replaced. The main water pump was done a few months ago. These changes have improved matters but not cured the overall behaviour.

 

Any suggestions for what to try?

 

 

[gav_is_con]

If it’s a DSG the DSG stat is well known to cause temperature gauge issues. Do a search. 

Happened to me on a 2011. Very cheap to obtain from Germany Autodoc the Mahle version. 

[langers2k]

Manual or DSG? If it's a DSG, there is a second thermostat that commonly causes cool running when it fails.

[teacake]

Thanks for the really quick replies!

 

Yes, it's a DSG 'box, so based on your responses that's definitely the next thing to try. I'll get that swapped and update you with the results.

[langers2k]

Yup, definitely worth trying if it's not been done. It's surprisingly common I'm afraid 😕

 

Example of a similar Yeti with some pictures: showing the part and location:

 

[DEL80Y]

1 hour ago, teacake said:

 

 

 that's definitely the next thing to try.

@teacake
it should of been the first and cheapest part replaced 

Even dealerships replace the main thermostat first which does not cure the problem.
Know of many that have been down this route and get stung🙄

Edited 2 February, 2020 by DEL80Y

[teacake]

Yes, Del80y, that's potentially a lesson painfully learned. I've thrown nearly £800 and two weeks at this so far...

[TheRobinK]

5 hours ago, teacake said:

I've just bought a 2015 Superb 2.0 PD170

 

I'd be sure you have a common rail CR 170 in that 2015 (congrats on the car - the estate version of the superb 2 is excellent. I'm sure you'll love it when you have this problem sorted).

[teacake]

29 minutes ago, TheRobinK said:

 

I'd be sure you have a common rail CR 170 in that 2015 (congrats on the car - the estate version of the superb 2 is excellent. I'm sure you'll love it when you have this problem sorted).

 

I expect you're right. I'm not yet fully up to speed with the model nomenclature with VAG diesels.

[DEL80Y]

On 02/02/2020 at 18:44, teacake said:

 I've thrown nearly £800 and two weeks at this so far...

This is the thing that really gets me angry for a £20 part

Glasgow Skoda are still doing it to customers the now.

You know because "they have never came across this problem before"  AGAIN 

[teacake]

4 hours ago, DEL80Y said:

This is the thing that really gets me angry for a £20 part

Glasgow Skoda are still doing it to customers the now.

You know because "they have never came across this problem before"  AGAIN 

 

Yup. The indy I take my cars to, who I completely trust, told me they'd called Skoda and said to them "Are there two thermostats?" and got the reply "No, just the one."

[teacake]

Finally got the car back tonight. All those people who identified the DSG thermostat as the culprit, give yourselves a pat on the back, because that's exactly what it was.

 

Thanks very much indeed for your advice, I just wish I'd asked for it before I had all the other parts replaced...

[tuningmania]

 

To " @teacake " - It is good to hear that the Problem is successfully fixed. It is good first to ask in this Forum for any Problems hereafter too

Edited 8 February, 2020 by tuningmania

[teacake]

11 hours ago, tuningmania said:

 

To " @teacake " - It is good to hear that the Problem is successfully fixed. It is good first to ask in this Forum for any Problems hereafter too

 

Lesson (expensively) learned on that score.

[Lucchese]

Hi Teacake this sound like my issue, did you change the DSG thermostat yourself or a garage? If a garage I hope you don’t mind me asking how much did they charge?

[teacake]

Hi Luchese

 

I had a garage do it, because I'm a bit useless when it comes to the mechanical bits. I can't give an exact cost as it was lumped in along with some other jobs, but I'd guess it was about £80, parts and labour.

[Lucchese]

Thank you Teacake I am going to discuss with the garage this week. Do you know if this was showing as a fault when plugged in to the computer. Question is will either the DSG or the other thermostat be picked up as a fault?

[teacake]

Sorry, I don't know the answer to that, Lucchese. I'm guessing not, as if it had they'd have been led to it straight away rather than asking Skoda for advice (erroneous advice as it turned out).

Edited 13 February, 2020 by teacake

[langers2k]

@Lucchese - I wouldn't expect either thermostat to show an error on a scan. Mine certainly didn't when the main thermostat was faulty :)

 

[Lucchese]

Thank you, I will look at replacing the DSG Thermostat first. 

[Lucchese]

DEL8OY I see you have changed your DSG Thermostat did you do this yourself? 

[gav_is_con]

A few of us have done our own including me. There are writeups on here I followed and maybe added me own. Please search. 

[DMacD]

SO I just recently bought my firs SKODA, a Superb(2015) with the same problem, running cold, temp never got above 70, even on a 40 mile motorway run. Took it back to the dealer(Main SKODA dealer) and it went something like this.(I may be paraphrasing somewhat)

 

Me: My temp is running cold, please fix it.

Dealer: Sure no problem, its probably the thermostat, well order one in and sort it.

Me: I've found online that it could also be the DSG Thermostat, should we change that too?

SKODA Mechanic: Your car doesn't have one, only the older cars have that.

Me: But Ive even got the part number I can give you(which i got from this forum)

SKODA Mechanic: Nope, your car doesn't have one of those.

Me: Ok then.

2 days later

Dealer: we've changed the thermostat and it didn't fix it, we need to send a report to SKODA, you can pick your car up till we hear back from them.

ME: Nope dont want it back till its fixed, please change the DSG thermostat.

Next day i walk into the dealer

Dealer: oh we've ordered another part for it.

Me: was it this part?(gives dealer DSG stat part number) the one you said my car didn't have?

Dealer: yeah thats the one

Another 2 days later

Dealer: Yeah that fixed it your cars ready.

 

In summary, 10 minutes on this very helpful forum and i was telling a feckin main dealer how to fix my car. Dealers hahaha.

[teacake]

Mad, isn't it? This cost me the best part of a grand.

[DMacD]

Wow that's a lot, for a part that costs about 25 quid and maybe an hour to change it. Sorry to hear that man, I was lucky as I am under warranty still (only had the car just over a week), which is why I had them do it. Other than that I would've done it myself.