Blowing Anitfreeze, but no overheat.

[DawgTool]

Hi All,

I have a strange issue with my SVX.
Background:
I recently replaced the stock radiator with a PWR aluminum one. The stock radiator had cracked (hair line fracture). I have never had any over heating problems. No oil in the antifreeze, no antifreeze in the oil.

Issues:
Heater blows cool when at a stop, when the car is moving air is hot again. Temp is set to 75 degrees.
PWR radiator is blowing antifreeze when at normal running temps. Antifreeze is coming from the cap, which appears to be in new condition (it is new, so it should be). Smell seems metallic in addition to the normal antifreeze smell.

Info:
Engine is not burning oil, running synthetic oil.
Over flow does not appear to be clogged, but its possible.
Car does not over heat, even if I run it very hard. Usually this just causes the pressure to build up and more antifreeze is blown.
The head gaskets were replaced about 2 years ago, the water pump was replaces 6 years ago.
I'm ruling out the water pump, thermostat, and head gaskets because the car does not over heat, blow smoke and there is no sign of mixed fluids.

Any Ideas?

Thanks,
DawgTool (Subaru SVX Sport)