Forgot about this post but update for pressure figures.. Try turn the butterfly valve on the throttle body next time mate saves the hassle of getting into the car or getting someone else to help! I don't seem to be losing any water/coolant after long drives so im happy enough atm! Also managed to comp test mine at WOT and got 120, 120, 120, 117, I think the compressiojn is due to rise with the mileage tho...