Recently I brought a MK6 with 80k Miles

Did the normal good checkover the car before buying.

Drove it 40 Miles home, Perfect.

Drove it that night, Perfect

Next day i was driving it temp light flashed on so i pulled over and "the place you put water in"

is steaming and bubbling I let it cool down and then drive straight home.

Did it again the next day so i opened the cap it forced water from the the air holes when opening

and continued to squirt all out till there was no water remaining just a little bit anyway.

Started to realized the fan was on as soon as the car started up then noticed it was wired up so

It instantly came on when car came on.

Anything would help!

coolant expansion cap is probably all you need there!