all those checks GC_AUS have been done. Theirs no visbile leak, she runs like a dream, i get 400 kms out of a 80Lt gas tank shes got power just shes got this leak some where. Manxman- i had green coolant in it the only time i saw a leak on the ground was when i had the air con on but that was the breather hole when i turn the car off. Ill give the red coolant ago, yeah the cap fits specs. has brand new thermostat. and gauge sits a fraction below half. the only reason i rule out the A/C was because its winter know i dont use it and i still got a slight leak Thanks for all the comments appreciate it