1975 Nissan 620. 1976 Nissan 620. 1977-1978 Nissan 620. 1979 Nissan 620. Notes:Production: -06/1979, OE Radiator. Notes:Production: 08/1977-, OE Radiator. Notes: OE Type. Atmospheric type valve allows cooling system to pressurize as needed, resulting in less strain on system's components.