2.
Disconnect the radiator lower hose (A).
Disassembly of the thermostat would have an adverse effect, causing a lowering of cooling efficiency.
Drain the coolant.
(Refer to Cooling System - "Coolant")
Disconnect the radiator lower hose (A).
Disconnect the heater hoses (A).
Remove the intake manifold.
(Refer to Intake And Exhaust System - "Intake Manifold")
Disconnect the water hose and then remove the heater pipe (A).
Tightening torque :
19.6 ~ 26.5 N.m (2.0 ~ 2.7 kgf.m, 14.5 ~ 19.5 lb-ft)
Remove the water temperature control assembly (A).
Tightening torque
Thermostat housing bolt & nut :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
Water inlet fitting bolt & nut :
19.6 ~ 26.5 N.m (2.0 ~ 2.7 kgf.m, 14.5 ~ 19.5 lb-ft)
Install in the reverse order of removal.
Fill with engine coolant.
Start the engine and check for leaks.
Recheck the engine coolant level.
Immerse the thermostat in water and gradually heat the water.
Check the valve opening temperature.
Valve opening temperature : 88 ± 1.5°C (190.4 ± 2.7˚F)
Full opening temperature : 100°C (212˚F)
Check the valve lift.
Valve lift : 8 mm (0.3 in) or more at 95°C (203˚F)
