alrite ive been having a leak on my radiator from under my little hose that connects to the clip under the radiator cap...its the hose that goes to the extra filter that everyone sees...i cut it but theres still a leak...i never experienced a leak from a cap yet but can this be from the cap...i have no signs of any drips from the cap or the hose...so im lost...can someone who has had a radiator cap problem help me out...i want to see if it might be the cap cause i see all the water but no possible way it could have came from the hose or cap...

also i was wondering...my radiator water seems to be dark and oil-lish it has this oil looking stuff and trash in it...is it a regular dirty water or blown head gasket maybe...its not milky or nothing though..its just regular with this oil dark look...but when its poured out its normal...is this good or bad...