Hi there my vehicle is a 2008 Holden Commodore SV6. I have just noticed that it is leaking what seems to be water slightly oily not much. Maybe just plain water??? It's a water like substance that smells musty could this have anything to do with my radiator. I just recently replaced my radiator cap because I heard bubbling in my engine once when I stopped the car. The aircon is also having issues and when I replace the radiator cap it had no issues for a while that was really good but now just yesterday the aircon has stopped being cold again...its works on and off.. Now I'm seeing water leaking when I pull up or park, trust me don't say it's water from air con because I'm not using the air con anymore anyway. No.1 I'm trying to get down to the bottom of why my air-con wants to work one minute not the other, we've replaced the evaporator & I replaced radiator cap and the mechanic couldn't find anything else wrong ewth air con or to get it to play up when he had the car... so now it's playing up again and I'm losing water. I haven't used the aircon since started playing up again now the water problem? Or could it be coolant? Maybe I'm up for a new radiator, but temperature of car when driving it doesn't over heat????? HELP!!! This is crazy I'm over it. I'm worried about the losing water . And in a previous post I stated that the dash it's flaahing "check engine" this happened yesterday when my air con failed again. I will be getting it code read tomorrow.