Milky Coolant - Corolla CE '03 A/T

#1
Hello, folks -

I have a Corolla CE 2003 A/T - I recently replaced all engine gaskets and even a connecting rod that was burnt since I bought it.

The car is now running smoothly, however, I check oil and coolant levels periodically and a few weeks ago coolant level was very low. I took the car to a shop and flushed the entire cooling system. LAst week, I opened up the hood and found the radiator cap was milky, coolant was in regular shape (not milky, not sticky). I panicked, took a look at the oil and is looking ok, not milky at all. Nor engine oil nor transmission oil are milky. The car is not overheating, I took it for a short trip to test it and it worked fine.

Do you guys know what it could be causing milky coolant but no milky oil?
 
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