Hi mate, i'd say your best bet would be to wipe all leaked coolant away and start it up and see if you can spot the bit it is leaking from. If i had to take a guess i would probably go with the pipe leaking as opposed to the actual thermostat leaking. Does it have the 'single use clamp' still fitted ? If it does, from what i've seen on mine, these are very good and it shouldnt be leaking. Running it should show you whether or not its the pipe leaking. worse case scenario ... remove thermostat ... clean the ends of thermostat up and make sure the ends of the hoses are nice and square (and clean of crud inside) then put it back together (i'd suggest 'mikalor' worm drive clamps. narrow, smooth underside and chamfered edges so as not to cut into the hoses) ... not tightening the clamps too much or too little. As dghughes mentioned, i'm not sure about the importance of using their single use clamps, i cant see any reason to use them other than to keep their profits up !
let us know how you get on !
