Section 152 (Engine Cooling System): Thermostat: Replacement

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

DRAIN COOLANT (See ENGINE COOLANT )
REMOVE BATTERY
REMOVE AIR CLEANER CAP SUB-ASSY (See REPLACEMENT )
REMOVE AIR CLEANER FILTER ELEMENT SUB-ASSY
REMOVE AIR CLEANER INLET NO. 2 (See REPLACEMENT )
REMOVE AIR CLEANER CASE (See REPLACEMENT )
REMOVE AIR CLEANER BRACKET (See REPLACEMENT )
REMOVE AIR CLEANER INLET NO. 1 (See REPLACEMENT )
REMOVE STARTER ASSY (See REPLACEMENT )
DISCONNECT RADIATOR HOSE OUTLET
REMOVE WATER INLET
1. Disconnect the wire harness clamp.
2. Remove the bolts, the 3 nuts and the water inlet.
Fig 1: Disconnecting Wire Harness Clamp
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE THERMOSTAT
INSTALL THERMOSTAT
1. Install a new gasket to the thermostat.
2. Align the thermostat jiggle valve with the upper stud bolt, and insert the thermostat in the water inlet housing.
HINT:

The jiggle valve may be set within 15° of either side of the prescribed position.

Fig 2: Locating Jiggle Valve
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL WATER INLET
Torque:

Nut 8.0 N.m (82 kgf.cm, 71 in.lbf)

Bolt 20 N.m (199 kgf.cm, 14 ft.lbf)
INSTALL STARTER ASSY (See REPLACEMENT )
INSTALL AIR CLEANER INLET NO. 1 (See REPLACEMENT )
INSTALL AIR CLEANER BRACKET (See REPLACEMENT )
INSTALL AIR CLEANER CASE (See REPLACEMENT )
INSTALL AIR CLEANER INLET NO. 2 (See REPLACEMENT )
INSTALL AIR CLEANER CAP SUB-ASSY (See REPLACEMENT )
ADD COOLANT (See ENGINE COOLANT )
CHECK FOR ENGINE COOLANT LEAKS (See COOLING SYSTEM )