Sorry if this is in the wrong place, but before i go spending money i dont have on stuff i wanna run a few things by the experts here on this.. The other day i fitted my adjustable actuator and took it for a test. I sat it to roughly stock boost on the actuator for the test before i was going to up it bit by bit... I let it warm up to 90c first before i drove it then went half a mile or so normal driving and everything was fine before i boosted, as soon as i give it the boot i was watching the boost gauge to see where i was at roughly...i seen about 8 psi before steam started coming out of the passenger headlight/bonnet corner area of the car. Checked the temp gauge and it was sitting ABOVE the red..so i cut it off straight away and popped the bonnet for a look, there was steam coming out of the top corner of the rad and coolant in the engine bay. Now i think the thermostat had stuck closed and prevented coolant from passing through,so i bought a new thermo from europarts and fitted it, filled the coolant bottle up half with remaining coolant and half water then bled the system to test run it again. As soon as i started driving BANG the temp jus began shooting up again, so i switched it off again and waited.. in hindsight, i dont remember hearing the fan coming on though so i think this could be the major problem!!someone please confirm?? But surely the new thermostat being put in shudve allowed the coolant to pass through and not let the temp rise to such a high level so quick? All advice helpful, Thanks Ryan