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ENGINE COOLANT REMOVAL (1) Disconnect negative battery cable. to engine block and thermostat housing. Reposition (6) Disconnect upper radiator hose and heater hose from thermostat housing. (7) Remove thermostat housing fasteners (Fig. 13). INSTALLATION (1) Clean all sealing surfaces. housing. Align air bleed with notch in thermostat (3) Install thermostat housing and fasteners. Torque fasteners to 7 N·m (65 in. lbs.) (Fig. 13). (4) Connect upper radiator hose and heater hose to thermostat housing. (5) Install fasteners securing heater return tube to engine block and thermostat housing. (6) Install battery. GINE - STANDARD PROCEDURE). RADIATOR PRESSURE CAP DESCRIPTION The cooling system is equipped with a pressure cap that releases built up pressure, maintaining a range There is also a vent valve in the center of the cap. This valve also opens when coolant is cooling and OPERATION The pressure cap allows the cooling system to oper- ate at higher than atmospheric pressure. The higher The gasket in the cap seals the filler neck, so that vacuum can be maintained, allowing coolant to be DIAGNOSIS AND TESTING DIAGNOSIS AND TESTING - COOLING SYSTEM Dip the pressure cap in water. Clean any deposits off the vent valve or its seat and apply cap to end of Fig. 13 Engine Coolant Thermostat Housing 1 - ENGINE COOLANT THERMOSTAT HOUSING Fig. 14 Thermostat Orientation 1 - ALIGN AIR BLEED WITH NOTCH IN THERMOSTAT HOUSING 7 - 22 ENGINE - 1.6L SOHC PT |