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Coolant Flush

  • 2007
  • Cayman
99 000

I was only able to remove about 60% of the coolant. Was the remaining 40% still locked in the heating system? What about "opening the thermostat"? Was I meant to do that somehow by heating up the engine? If so, would that not have made the coolant too pressurized to drain safely? The Pelican Parts guide I followed made no mention about either of these issues. Stupidly, I did not measure the amount I removed before moving to refill, so the car now has 60% new mixed with 40% old coolant. 


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