Well nearly i don't know why temp went heater went cold luckerly only 2 mins from home so stopped when i got home turned the car off took the rad cap off slowly and wooosh steam everywhere i have checked the oil and no water in the oil so its not the head gasket thank fook.Need some help on how to bleed the system standard rad bleed valve is ronded off have tryed running with the rad cap off but heater is still going hot and cold.Also water in the expansion tank is cold is this wright sorry for the lenght of the thread but wanted to cover everything.Ah its a 94 TT auto.

you need the car on an incline for starters, then you need to fill it up to the brim and remove the bleed screw from the left hand side of the rad, then with the engine running watch the water go down and top up as required, but dont forget to let the thermostat open

Tried this but the bleed valve is fooked just run it with the cap off for a while took a little bit of water but not a lot i have just a new cap to see if this does the trick cos i have noticed water on the floor in the garage on the passenger side wright at the front but it had a new rad last year and a new bottom hose so hopefully it's nothing to serious.

try getting it up in the air with it running and you might be able to see where its coming from

Yeah not a bad idea that man.

Sorry mate so did you actually overheat or did the heater just go cold?

 

Obviously when you take the cap off a normal radiator it will "go whoosh"and throw steam everywhere if it is hot and you will then have to fill up again - as you did.

 

If your bleed screw is knackered why dont you order another one off Mike @ MJP? cant imagine it will cost you more than a couple of quid!

turn the heaters on max heat and max flow while running the engine, that will circulate the water and get the air out :)

Thanx everone for there help i am off to work in a bit and will let you know how i get on am going to drive nice and steady and take some water with me just in case.