Radiator Flush now no heater is spotty

kevinpantz

I had a similar experience in my S2000 before. What I noticed would happen though is when I turned the heater on, it would blow cold air for about 5-10 minutes, then finally get warm but also cause the engine temp to skyrocket at the same time.

The issue was resolved by burping the radiator to release air bubbles and adding more coolant as necessary during the process (turns out I didn't put enough in while flushing it in summer). Even at the dealership it's humans who can make mistakes. Hope that helps.