Temp gauge fluctuating

[stuart-88]

Hi

Recently bought a GTI, and noticed the temperature gauge fluctuates. Warms up fine then will drop down to 70, raises back up to 90 and just goes between them.

Is this normal? Or a sensor having a mare?

Any help appreciated.

[PT82]

Thermostat. A lovely 3 hours labour to replace!

[Andy]

Move to a gti Stuart!need some pics

[stuart-88]

Thermostat. A lovely 3 hours labour to replace!

3 hours?!  I hope that includes 2 1/2h of standing around and drinking tea before hand!!

I'll get some pics over the weekend Andy 

[Madone]

My stat was done not so long ago by a Audi master tech, even he said it took a good few hours. The stat is right at the front below the inlet, a pig to get to apparently ! 

[Wolf Burger]

Main Thermostat will sort this.

Don't mess with Coolant sensors ETC.
Bit of an awkward change. Alternator needs to come off from memory.

[MC71]

Yeap.....your main stat needs changing. 

It will take some time to fit due to its locations deep in the bowels.

[dazza]

It took me about 3 hours i had a bit more room as we were in the middle of doing the cam belt. Are you DIYing it?

[stuart-88]

Cheers guys. Sounds pretty involved, should be fun