I am slowly leaking antifreeze, I have replaced radiator, all the hoses, my over flow resivor, thermostat, and the gaskets associated. I have not smelled coolant in the car or seen it on the floorboards and can't tell anywhere that it is leaking, and just changed my oil and there is no coolant in it, and had a compression check come back just fine. My car is running an eclipse turbo, which is water cooled, but haven't noticed it leaking any and it shouldn't get hot enough to be able to evaporate it and it is a sealed system.

Anyway to check for a leak in the system?

 

do a pressure test on the the coolent system, could add a dye to the coolant and run the car then us a black light to see where it is leaking, its possagble you are using coolant small headgasket leak. What where your numbers on the compression test? Any slight diff between #2 and #3 is where I have seen headgaskets start to leak and burn coolant. Bad water pump leak around hose.

 

Nope 2 and 3 were the same and 1 and 4 were identical as well and only like 3-4 off from the sets.

 

Pressure test it.

If a pressure test turns up with nothing, run a combustion leak test (sometimes called a "block test"). Presence of carbon monoxide in the cooling system indicated by a combustion leak test would mean the head gasket is bad or the block/head is cracked.

 

pressure test, also have you check your intake manifold gasket? you could be leaking coolant through that and into the combustion chamber and burning off. If its not a bad leak you may not smell it burning off regardless of where its burning off at.