So, I'm losing a little coolant, and keeping more pressure in the cooling system than I think is normal. I see some moisture on and around the clamps/hose at the thermostat junction. OK, I'll swap out the clamps. But today, I notice something else:

Sweet mother of God, that looks like coolant leaking from the SAI valve, doesn't it? How would that even be possible?

I'm not 100% sure it actually is, I can't quite place the smell. It could be oil of some type as well. But it definitely seems green...

Any suggestions for first steps? Gonna disassemble the SAI and pipe on this side this weekend.

 

 

If it is coolant, could be that heater hose right above the valve.