Over cooling?

[wackyracer]

Normally when my car ( leon Cupra) is warmed up it runs at about 90degrees ( middle of temp guage) However with the colder nights and days i have noticed that this often drops to about 75 - 80 when the outside temp drops below 8c. This even happens at motorway speeds and i drive about 25 miles to work mostly on the motor way so the car is def warmed up! However when i get into slower traffic the temp often goes up alittle.
Is this right? Or is it over cooling, possibly a stuck thermostat?
Just curious!

 

[sebasti0n]

Noticed mine is doing the same,

 

[STEVEO@CYMRU]

mine too, i dont rag it unless the temp is 90 and has been so for a while but now it drops so dont get to go fast

 

[Willie]

I'm 99% sure the engine temp will not actually be this temp, I've been driving for 14 years and all the cars I've driven when warmed up run at 90 degrees C approx
Therefore this must be some sensor problems

 

[Snappy Larry]

Could be the thermostat stuck open? do they ever get to 90?

 

[Leigh15]

It does sound like a dodgy thermostat to me

 

[Cowie]

mine started last week it would get to 90 then fluctuate below that eventually going down to 0,was confirmed it was dead when had the car mapped on friday and vag-com was run to show any faults,was the sensor in the thermostat housing and cost me £30 fitted

 

[Snappy Larry]

If it's fluctuating it's the sender, change it for a green one.
If it never gets hot especially in the winter but does in the summer its the thermostat.

 

[wackyracer]

had the coolant sensor changed a few weeks back as it was faulty. Mine does sometimes hit 90c but only on warmish days. anything below 10 -11c and it drops. This morning when the tem was only 2c outside it was as low as75c on the dial and i had been on the motor way for nearly an hour! Think i will extract the thermostat and test it.