Courtesy of Zmanalex:
From the workshop manual for a N/A car.
NOTE IT IS CRITICAL THAT THE FOLLOWING PROCEDURE BE FOLLOWED EXACTLY!
IT IS TIME CONSUMING, HOWEVER, ESSENTIAL!
3.1 Remove bleader in the stock upper heater hose.
3.2 Fill radiator and coolant recovery reservoir with anti freeze coolant. It should take 10 quarts (11.365 litres), including reservoir. It is important that the coolant is poured through the radiator filler neck at less than 1.5 quarts (1.7 litres) per min