I'd read it before, all the bad behavior exhibited by 1.6 Polo's. Eratic idle, lurching when driving, even cutting out. Mine was driving me nuts, just awful to drive like that. I cant rely on anyone here in Brisbane to have a look at it (unless someone has a suggestion). It was leaking a little coolant from the water pipe that leads to the top radiator hose, turns out this pipe is a one piece unit, with thermostat and about five hoses coming of it. $140 dealer only, not bad as it comes with the temp sensor.

Unplugged the battery.
Moved the distributor cap, and wiring loom out of the way.
Pulled off the hoses, a breeze cause of the plastic fittings.
Drained all the coolant.
Three 10mm?(i think, it was a week ago) bolts.
Took of old unit, put on new one.
Radiator and cooling system flush(heater on)
Plugged everything back on.
New coolant.


Good as new, i guess if u wanted to u could just buy the sensor, but i'm really glad this fixed the idle as there was the leak that needed looking at anyway.

Now if I hadnt just spent the best part of $1200 on a new aircon compressor, i would be feeling great.