1991 LEXUS SC400 Service Repair Manual

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Page 1265 of 4087

LEXUS SC400 1991 Service Repair Manual CHECK AND REPLACEMENT OF ENGINE COOLANT 1. CHECK ENGINE COOLANT LEVEL AT RESERVE TANKThe coolant level should be above the ºCOLD LEVELº at nor- mal temperature (20 5C (68 5F)). If low, check for l

Page 1266 of 4087

LEXUS SC400 1991 Service Repair Manual (f) Slowly add coolant to water inlet housing until it is full.w Use a good brand of ethylene±glycol base coolant, mixed according to the manufacturers directions. w Using coolant which includes m

Page 1267 of 4087

LEXUS SC400 1991 Service Repair Manual WATER PUMP COMPONENTS FOR REMOVAL AND INSTALLATION REMOVAL OF WATER PUMP 1. REMOVE TIMING BELT(See steps 1 to 35 on pages EM±35 to 43) 2. REMOVE RH IGNITION COIL (a) Disconnect the ignition coil

Page 1268 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Remove the two bolts holding the water inlet housing tothe water pump. (c) Pull out the water inlet and inlet housing assembly. (d) Remove the O±ring from the water inlet housing. 4. REMOVE W

Page 1269 of 4087

LEXUS SC400 1991 Service Repair Manual INSTALLATION OF WATER PUMP (See Components on page CO±8) 1. INSTALL WATER PUMP (a) Remove any old packing (FIPG) material and be careful not to drop any oil on the contact surfaces of the water pum

Page 1270 of 4087

LEXUS SC400 1991 Service Repair Manual (b) Apply seal packing to the sealing groove of the waterinlet housing as shown in the illustration. Seal packing: Part No. 08826±00100 or equivalent w Install a nozzle that has been cut to a 2±3

Page 1271 of 4087

LEXUS SC400 1991 Service Repair Manual THERMOSTAT HINT: Removing the thermostat would decrease the cooling efficiency. Do not remove the thermostat, even if it tends to overheat. COMPONENTS REMOVAL OF THERMOSTAT 1. DRAIN ENGINE COOLANT (

Page 1272 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF THERMOSTAT INSPECT THERMOSTATHINT: The thermostat is numbered with the valve opening temperature. (a) Immerse the thermostat in water and gradually heat thewater. (b) Check the valve
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