The most common issue that will cause coolant to come out of the overflow (located above the right rear wheel) is an air bubble in the coolant system. Next time you top up the coolant, remove the plastic cover underneath the coolant and oil caps and flip the bleed valve open. Drive with it open for a few days, then close it. The bleed valve will help any air in the system purge, and hopefully resolve your issue. Best, -Rick
https://www.renntech.org/forums/topic/32107-bleeding-air-in-radiator/