[Phantom]

What you can also do to keep the temp steady is drill a small hole in the T-stat just past the inside of the gasket. That will allow a small bit of hot coolant to leak back to the radiator. I did that on my car and the warm-up time is no slower that before the change but it helps to get the air bubbles out of the heating system and moves some heat out before the t-stat opens. I did two 1/16 holes from what I remember but others have done larger.