Section 9 (Thermostat): Installation

WARNING: This page is about a different car, the 2000 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.

PLACE THERMOSTAT IN WATER INLET HOUSING
1. Install a new gasket to the thermostat.
2. Insert the thermostat into the water inlet housing with the jiggle valve facing straight upward.
  NOTE: The jiggle valve may be set within 30° of either side of the prescribed position.
  
  Fig 1: Aligning Thermostat Jiggle Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL WATER INLET
Install the water inlet with the 3 nuts.

Torque: 19 N.m (195 kgf.cm, 14 ft.lbf)
FILL WITH ENGINE COOLANT (See COOLING SYSTEM BLEEDING )
START ENGINE AND CHECK FOR ENGINE COOLANT LEAKS