The moment the engine starts I'm in control. I go thru' my checks and if satisfactory, with the needles off the stops, I taxi to the hold some five to six minutes distanr, I do have water and oil radiator blinds tailored to the season and relevant average OAT. By the time I get to the hold for my departure checks the temps are climbing nicely, By the time I line up, I'm almost at full operating temperature. The climb out does the rest.