1991 LEXUS SC400 Service Repair Manual

Page 2801 of 4087

LEXUS SC400 1991  Service Repair Manual 
COMPONENTS FOR REMOVAL AND
INSTALLATION
±
COOLIING SYSTEM RadiatorCO±15 
WhereEverybodyKnowsYourName

Page 2802 of 4087

LEXUS SC400 1991  Service Repair Manual 
REMOVAL OF RADIATOR
(See Components on page CO±15)
1. REMOVE BATTERY CAUTION: Work must be started after approx. 20 seconds or
longer from the time the ignition switch is turned to the
ºLOCKº posi

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LEXUS SC400 1991  Service Repair Manual 
(4) Pressure hose from hydraulic motor
(5) Return hose from hydraulic motor
6.  DISCONNECT COOLING FAN INLET PIPE FROM FAN SHROULD
Remove the two bolts, brackets and bushings, and discon-
nect the in

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LEXUS SC400 1991  Service Repair Manual 
(b)  Slightly lift the radiator, and disconnect the two oil cooler
hoses (for cooling fan) from the hose clamp on the
radiator fan shrould.
(c)  Remove the radiator.
(d)  Remove the two lower radiato

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LEXUS SC400 1991  Service Repair Manual 
(d)  Install the upper radiator support with the two bolts andscrew. Install the two upper radiator supports.
Torque: 12 N Vm (120 kgf Vcm, 9 ft Vlbf)
3. CONNECT WATER TEMPERATURE SENSOR
CONNECTOR
(a

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LEXUS SC400 1991  Service Repair Manual 
(3) Two oil cooler hoses (for A/T) to radiator.
(4) Lower radiator hose to radiator
(5) Upper radiator hose to radiator
7. INSTALL RADIATOR RESERVOIR TANK (a)  Install the reservoir tank to the reser

Page 2807 of 4087

LEXUS SC400 1991  Service Repair Manual 
9.  FILL ENGINE WITH COOLANT (See page CO±7)
10.  FILL COOLING FAN RESERVOIR TANK WITH FLUID (See pages  CO±23 and 24)
11.  CHECK AUTOMATIC TRANSMISSION FLUID LEVEL
(See page  MA±11)
NOTICE: Do no

Page 2808 of 4087

LEXUS SC400 1991  Service Repair Manual 
ELECTRONICALLY CONTROLLED HYDRAULIC COOLING FAN
Description
In this way system, the cooling fan ECU controls the hydraulic pressure ac\
ting on the hydraulic motor, thus
controlling the speed of the