Seriously?
can someone pull up those old pics of the damage models being created?
All those different components in each aircraft being painstakingly modeled.... There are going to be SO many different ways a plane can be damaged that its gonna blow our minds... fuel tanks, ammo boxes exploding, guns getting damaged, control lines, control surfaces, coolant, oil, engine block, oxygen tanks exploding, getting a bullet in your skull, hell even getting a tire deflated from a MG round and not knowing about till ur tits up on the airstrip.... its all gonna be in this game.
short answer yes... gycol leaks will be in the game.
long answer, well you read the long answer already.
EDIT:
heres an old spit pic... everything in purple is part of the damage model system. see all that? that can all go wrong... insane level of detail.
http://download.softclub.ru/pub/il2p...nShots_001.jpg