Driving back from work 52 miles away; I'd forgotten about the cardboard in the grille I found my temp gauge pegged after 10 miles. Pulled over , opened the hood and let that 45 mph wind cool off the engine. Later, roustabouts drive by and offered to refill my radiator... I get home flush the radiator and change the thermostat,. Well boys and girls this engine does not "surge " anymore. Matter of fact it runs like a champ! Answers, anybody?????