I'll that a stab....if it is spraying and it is at the back of the engine bay it would be a heater hose. There is one hose towards the passenger side with a bend at the top that always develope a pin hole leak in almost the same spot in the bend. The pin hole leak is hard to spot if the cooling system is cold or enough coolant has leaked out so there is little to no pressure. If you had duct tap with you you could have taped it up and limped home... but who wants to take the chance eh.
'99 E39 540iT
Last edited by MLue1; 10-14-2010 at 10:41 PM.