Just bought my Karoq at the weekend, all been great, this morning on the motorway on up hill temp gauge went wild on coolant, get on the flat or down hill quickly returns to 90?

 

Question is would this be levels? Or sensor? And which coolant is recommended for the Karoq.

Probably more likely to be a sticking shroud in the water pump.

How do I check this? 😕

Just update, checked coolant levels all looked good gave the sensor on the coolant reservoir a wiggle and nudge and on driving tonight had  90c coolant all the journey. Could it be that the car has been sat on a forecourt not moving for a couple of months and needed running in again and everything flowing?

10 hours ago, Dandan86 said:

How do I check this? 😕

Wait till its happening frequently then disconnect the wiring plug from the water pump at the end of a journey when the engine has behaved normally and the guage was at 90°, problem should go away, reconnect it if you miss the excitement and spontanaeity!

 

1 hour ago, Dandan86 said:

Could it be that the car has been sat on a forecourt not moving for a couple of months and needed running in again and everything flowing?

 

Unlikely.

1 hour ago, J.R. said:

Wait till its happening frequently then disconnect the wiring plug from the water pump at the end of a journey when the engine has behaved normally and the guage was at 90°, problem should go away, reconnect it if you miss the excitement and spontanaeity!

 

 

Unlikely.

So it’s not actually getting that temp? Just the car thinks it is? 

It is getting genuinely hot. If the sleeve is only sticking intermittently you can unplug the connector so the water pump operates unobstructed all the time and won't overheat. This will take the car take longer to get to temperature.

 

Sometimes the sleeve will stick partially covering the impellor and may not return fully to its resting position so unplugging the connnector on the pump will make no difference, there is no way of knowing without removing the pump.

 

 

Its a good idea to unplug it for a week ot 2 and see if the problem goes away, then if you reconnect and the problem comes back you know 100% that the water pump is the problem and not something else.

 

10 hours ago, SuperbTWM said:

 

Its a good idea to unplug it for a week ot 2 and see if the problem goes away, then if you reconnect and the problem comes back you know 100% that the water pump is the problem and not something else.

 

Thanks  are there any guides/images to know which to unplug?

Brown plug between the cam pulley and fuel pump pulley

Edited 2 November, 20232 yr by SuperbTWM

8 hours ago, SuperbTWM said:

Brown plug between the cam pulley and fuel pump pulley

Done that put in a OBD2 and put live data on range of 89-100c, 100c was going up hill. Dash however says 90c guessing as the brown plug is out there’s no readings?

Ignore what the dash gauge says, it is programmed to read 90 at a real 77 and still read 90 at 117 so it’s readings are not to be followed.

On 01/11/2023 at 20:40, J.R. said:

disconnect the wiring plug from the water pump at the end of a journey when the engine has behaved normally and the guage was at 90°

 

The reason I used those words was to be as sure as one could that the sleeve had retracted and was in the non operational position before disabling it, as someone said it is possible that it could be stuck in the partially deployed position.

 

Your live data reading looks correct to me, in the days before the water temperature guage readings were fiddled if you had an accurate guage with a 270° scale that is exactly what you would see with an 88° thermostat, did it return to somewhere around 90°c after the hill?

 

With the sleeve disabled the engine will take slightly longer to warm up but you will notice that you have to drive a couple more miles from cold before feeling warmth from the heater, its a very good system when it behaves.

57 minutes ago, J.R. said:

did it return to somewhere around 90°c after the hill?

After hill went down to 94 then a min later at 90.

 

As long as I can get to work and then get it fixed under warranty it’ll be happy days. Only had the car one week love it bar this… need it fixing as planning on going into Europe over winter.

 

The temperatures sound spot on, if it carries on behaving then reconnect the connector and do the same live data test on the hills, hopefully that will definitively confirm the sleeve is sticking.

 

Of course that wont be definitive for the Skoda "how can we jerk around this customer" warranty repair, they will want to charge you a silly price for diagnostics (plugging in a fault code reader) which will show nothing and be pointless compared to the real diagnostics that you have done but be enough for them to keep your money and refuse the warranty claim as "o fault found"

 

Cynical, - moi? 😂

Good luck on your warranty quest, if they can replicate the fault easily I think you are golden, hopefully the issue comes back straight away when you plug the pump back in again. 
 

 

The OP shouldn't worry about it. With fully synth oil as long as it doesn't get into the high 120's its nothing to worry about. When towing we often get to 113-116C but it soon cools down quickly enough, albeit running temp even then is around 106-108C.

Our previous two cars were Passat Estates (140 and 150 TDi) and they exhibited the same effects when towing. Even with the Karoq solo the oil often sits in the mid 90's.

 

Thread title and first posting both clearly state coolant temperature.

 

I agree with your comments about oil temperature.

Oops! 🤐