90916-03052 THERMOSTAT, 3FE – FJ60, FJ62, FJ80 TOYOTA LAND CRUISER
This Thermostat fits the following:
• FJ60 (8/87 – 7/88)
• FJ62 (05/1988 – 01/1990)
• FJ80 (1991 – 1992)
– For (1993 – 1997) 1FZ-FE: See 90916-03117
The thermostat is a wax type and is mounted in the water outlet housing. The thermostat includes a type of automatic valve operation by the fluctuations in the coolant temperature. This valve closes when the coolant temperature drops, preventing the circulation of the coolant through the engine and thus permitting the engine to warm up rapidly. The valve opens when the coolant temperature has risen, allowing the circulation of coolant. Wax inside the thermostat expands when it is heated and contracts when it is cooled. Heating the wax thus generates pressure which keeps the valve closed, thus opening the valve. When the wax cools, its contraction causes the force of the spring to take effect once more, closing the valve. The thermostat in the 3FE (1991 – 1992) FJ80 Land Cruiser operates at a temperature of 88˚C or 191˚F.