I've noticed the my yeti is quite slow to warm up and rarely if ever reaches the full 90 since I bought it 2 months ago. 10/15km spin today it's only getting up to 55 degrees (-3 degrees)

Motorway run yesterday at 110kph for around 50 mins and only sitting around 68 degrees (outside temp 0 degrees)

I'm guessing it's the the dsg thermostat or at least worth trying first given the easier access.

I see a youtube video for a sharan dsg on youtube, I'd imagine the yeti is in a similar enough spot?

https://www.youtube.com/watch?v=Pzx2JMrfD-w&ab_channel=AleksandrZinkevics 

I take it you are talking about water temperature.
Sounds to me like the thermostat is faulty.
I cannot see how the DSG thermostat could affect it that much.

 

Edited 10 December, 20223 yr by Urrell

But it does.

http://briskoda.net/forums/topic/445467-dsg-equipped-cars-second-thermostat

 

Certainly does

Hi

 

Presumably the transmission oil cooler is a transmission oil/engine coolant heat exchanger, so it initially warms the gearbox oil when it's cold and cools it when it's hot.  The coolant shouldn't begin to flow through it until the engine has warmed up enough for the "second thermostat" to open.

Anyone know the part number for the dsg cooler thermostat and/or somewhere reputable to purchase. Local motor factors not able to source.

https://www.micksgarage.com/g/thermostat-oil-cooling/products/bdd71765401/febi-bilstein-thermostat-oil-cooling?loc=ie&gclid=Cj0KCQiA4uCcBhDdARIsAH5jyUlnreefgWHoRLF534VkSUPsLp6zL_rJU6T_wv7ZOmtaxpDISMZkdZsaAkOSEALw_wcB

 

Would that be suitable?

Hi

 

The thermostat you list opens at 80 degrees C.   

 

For the 2009 to 2017 Yeti the OE part number is 1K0121113A , which opens at 75 degrees C. 

 

I suspect 5 degrees isn't going to make much difference, but you might as well get the correct one.

 

The Febi Bilstein 172376 one example of a part that meets this OE spec.   There are many equivalents from other makers, mostly around the £20 mark in the UK.   The same part is used in many VAG cars.

On 10/12/2022 at 10:45, toot said:

But it does.

http://briskoda.net/forums/topic/445467-dsg-equipped-cars-second-thermostat

 

Well...ya live 'n' learn. 👍

Bought the part on amazon and waiting for it to arrive but starting to doubt I need it...

I was on a 90 min motorway spin recently. Cruise control set to 130kmh. It was going up to 105/106 degree celcius on the digital thermostat, seemed a little on the high side or maybe normal?

Still only getting up to mid 70s in 12 degree weather on a 10min 10mile run to work.

What digital thermostat? The only ones I have are for Oil temperature and they would reflect the figures you are seeing in your first and last post...

 

@feirmeoirThere is a coolant gauge or readout and eventually the coolant should get to an indicated 90*oC or so.  It is not accurate.

 

Then there is the Oil Temperature.  The Oil temp might well go higher, show a higher than in the 90,s temp. 

The Coolant is supposed to be reducing the oil temp back down into the low 90's when all is working well. 

 

Not sure where you are at now, but at around 12*oC ambient temp one might expect the Coolant to get to indicating at around 90*oC by 10 miles or maybe a few miles more.

There’s the physical gauge and then the one in the computer 

 

Ah I see, oil temp was running up to 107 on the motorway spin and coolant just above 90. 
 

coolant runnning less than 60 after a 13mile spin 
 

Ok.

So there is an issue right there when the oil is getting to an indicated 72*oC and the Coolant gauge is showing so low.

The coolant should get to temp as that is heating up the engine / engine oil.

 

Ok that the oil takes a good few miles to get to a efficient operating temp, ie around 90 *oC, not so with the coolant.

 

 

Edited 6 January, 20233 yr by toot

Hi

 

The whole idea of thermostats is that they allow more rapid warm-up than would otherwise be the case.  Once warm-up has happened and the thermostat(s) are open they won't be affecting the temperatures one way or the other.

 

Your symptoms appear to be consistent with a thermostat that is not fully closing when cold, and may even be stuck wide open all the time.  Low coolant temperatures won't be doing much for engine  efficiency.

 

Worth noting that the "needle" coolant temperature gauge indicates rock solid 90 for any coolant temperature between roughly 80 and 100, thanks to software.  This is presumably to dissuade customers from bothering their dealers unless something really is awry.

thanks for explaining that lads, I have a dsg thermostat ordered, Skoda are looking for 280 so might give it a go myself.