IS200 coolant boiling

[doski]

pretty stumped so thats why im resorting to asking for help from the 306 forum

picked up an IS200 yesterday and everything seemed fine goes, stops and no rattles.

after driving 100 miles home the coolant was boiling in the reservoir. I took the cap of the rad and it was just water in there I filled it up with antifreeze but still the coolant boils like a kettle after a long drive.

theres no oil/coolant mix anywhere, the heaters blow very hot, the thermostat opens and fans come on. 

Ive stook some cardboard under the car to see if I can find a leak but its gone through 1 litre of coolant in around 2 hours.

very slight steam from exhaust but I compared it to my friends '12 plate focus and his was exactly the same (just cold outside)

[welshpug]

common for the head to crack on these, they don't often mix fluids.

edit, thought you said L200


start with a new cap, boiling point is significantly higher under pressure.

[doski]

common for the head to crack on these, they don't often mix fluids.

edit, thought you said L200


start with a new cap, boiling point is significantly higher under pressure.

thats my thoughts mate  if the presure is lower it boils at a lower temp right?

the rad looks a little cruddy now so maybe ill get a new one there only £60 (not sure if that comes with a new cap though?

[C2K]

Rad cap would be my first port of call too.

[Choppin]

Another for rad cap, my brothers Lexus did the same thing but was faulty cap and a thermostat

[doski]

Left some card under it this morning. The rad has a few stones in it at the very bottom and coolant was dripping so I've ripped it out just to wait 4 days now for the new one