after reading daves story i'm now a little gutted, my HG went on my 83 cabby gti, fixed it with genuine parts and had the head skimmed, alls fine but looked at the car the other week (don't use it that often now) to find the dreaded mayo again as with dave none in the dip stick or cam cover area, spare time today so retook the head off to find a perfect HG, bah but a little mayo down there, could this be the oil bit or is the head to far gone