hi, can anyone help? over the last few days i have noticed a smell of antifreeze when my 260 is hot, i poped the bonnet saturday and there was a sign of antifreeze around the filler cap, it had dryed so i just cleaned it off and thought i must have overfilled the header tank the last time i checked it. but this evening i got home from work (only about 6mile) and could smell antifreeze again, i cheched and found antifreeze comming out of the cap and the top hose was under so much pressure i could hardly get it to move when i pressed it, has anyony any know issues that cause this, hope its not a head gasket!!! any help will be welcomed. thanks, dave