I have a99 to 4.0 with 45,000 miles. It keeps spitting coolant out of the over flow vent. Runs about 210 with a 180 thermostat. Everything changed on the cooling system

What is your question?

The fan throws coolant on the drivers side firewall. It doesn’t spit a lot, maybe a cup s a day. Pressure tested no leaks cap holds pressure.Did a chemical block test, showed no combustion gas.

What makes this problem better or worse?

Worse when hot. It won’t do it while idling in my driveway

How long has your 1999 Jeep Wrangler had this problem?

3 years