right,

the boiling happens when the car is off, or when it has bee idling for a while ( 5/10mins after a drive ).
it boils both with the cap on and off.
if started from cold all is fine ( all bar a little oily blue smoke )
no smoke from exhaust.


just a thought, although i dont have a rs500 cooler yet, when i do get one i thought about getting a turbo cooler aswell. now, i no these go after the turbo but befor the header tank so why are they called turbo coolers? has anyone plumbed one in so that they go befor the turbo

thanx for your help