1991 LEXUS SC400 Service Repair Manual

Page 2545 of 4087

LEXUS SC400 1991  Service Repair Manual 
DISTRIBUTOR
COMPONENTS FOR REMOVAL AND
INSTALLATION
±
 IGNITION SYSTEM DistributorIG±23 
WhereEverybodyKnowsYourName

Page 2546 of 4087

LEXUS SC400 1991  Service Repair Manual 
REMOVAL OF DISTRIBUTOR
(See Components on page IG±23)
1.  DRAIN ENGINE COOLANT (See page  CO±6)
2.  DISCONNECT RADIATOR HOSE FROM WATER INLET
3.  REMOVE NO.3 TIMING BELT COVERS
(See steps 1 to 8 on

Page 2547 of 4087

LEXUS SC400 1991  Service Repair Manual 
7. DISCONNECT HIGH±TENSION CORDS FROMDISTRIBUTOR CAPS
Disconnect   the high±tension cords at the rubber boot. Do not
pull on the cord.
NOTICE: Pulling or bending the cords may damage the
conductor

Page 2548 of 4087

LEXUS SC400 1991  Service Repair Manual 
INSTALLATION OF DISTRIBUTOR
(See Components on page IG±23)
1.  INSTALL CAM POSITION SENSORS TO DISTRIBUTOR HOUSINGS
Install the  cam position sensor with the bolt and screw. Install
the two cam posi

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LEXUS SC400 1991  Service Repair Manual 
5. INSTALL DISTRIBUTOR CAPSInstall the distributor cap with the three bolts. Install the two
distributor caps.
Torque: 3.8 N Vm (39 kgf Vcm, 34 in. Vlbf)
6.  CONNECT  HIGH±TENSION CORDS TO DISTRIBUT

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LEXUS SC400 1991  Service Repair Manual 
9.  INSTALL DRIVE BELT IDLER PULLEYInstall the idler pulley and cover plate with the pulley bolt.
Torque: 37 N Vm (380 kgf Vcm, 27 ft Vlbf)
10.  INSTALL NO.3 TIMING BELT COVERS
(See steps 5 to 9 and

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LEXUS SC400 1991  Service Repair Manual 
(c)  Check the ignition timing.
Ignition  timing: 8±125 BTDC @ idle
(Transmission in neutral range)
If the ignition timing is not as specified, check that following
conditions are normal: w Throttle

Page 2552 of 4087

LEXUS SC400 1991  Service Repair Manual 
ENGINE SPEED SENSOR
COMPONENTS FOR REMOVAL AND
INSTALLATION
REMOVAL OF ENGINE SPEED SENSOR
1.  DISCONNECT CABLE FROM NEGATIVE TERMINAL OFBATTERY
CAUTION: Work must be started after approx. 20 se-
con