2004 V70 Stick Non-Turbo. I have been losing coolant for a long time. It is not a giant leak, but it will set off the light every few hundred miles. Of course the sensor goes off when it is even a few ounces low. I have tried and tried and I can not find the leak. I took it into a shop today, and they put pressure into the system and after an hour there was no loss. They put it on the lift and still could not find anything. I know that it is an external coolant leak because I can smell it, and I have seen it as well. When I pulled into my driveway a few weeks ago in a foot on snow there was a long streak of bright green deposited on top of the snow. I have checked around the hoses and heater lines and I can find no leak???? I cant figure it is the radiator or that would show up when in the shop and pressurized and on a lift.

Do the freeze out plugs leak on these motors?