He was only asking if he would see any improvement. It's already out. Naturally, if you remove an obstruction you theoretically improve the situation. Would he see any improvement? Only if the system was marginal to start with was Rogers point. And I agree. If the system is being controlled by the thermostat, theoretically he will see no difference. The thermostat will still set the engine temp.

IMHO, MY 2 Pennies, yada, yada, yada...