A broken shroud would actually make you overheat, because of the misdirected flow... But, it shouldn't take you over an hour to get up to operating temp... Maybe like 10 minutes in this cold, but not an hour... I guess you could put some cardboard over part of the grill... You must have flushed, changed, and re-done the cooling system so many times its not OVER-efficient... :rotfl2:
Is your heat at least finally hotter than the sun?
Rob L.