hi thanks for that,i had my local garage check it all there was a little white on the oil filler cap but a few peaple have said theres no major arrow pointing to head gasket.they put it down to condensation.they also tried a dye test again even though it did change colour slightly they said it could be down to the chemicals from the flush.some have said to disconnect the two pipes on the oil cooler and connect them together,flush the cooling ststem again and see if it still persists but im not to sure what to do for the best