1991 LEXUS SC400 Service Repair Manual

Page 1729 of 4087

LEXUS SC400 1991  Service Repair Manual 
35.  INSTALL LH IGNITION COIL(a)  Install the ignition coil with the two bolts.
(b)  Connect the following connectors and cord:(1) Ignition coil connector
(2) Noise filter connector
(3) High±tension

Page 1730 of 4087

LEXUS SC400 1991  Service Repair Manual 
37.  INSTALL A/C COMPRESSOR(a) In sta ll th e A/C co mp re sso r, co mp re sso r sta y an dground  cable with the three bolts and nut.
Torque: Bolt 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
Nut 29 N Vm (300

Page 1731 of 4087

LEXUS SC400 1991  Service Repair Manual 
CYLINDER HEAD
COMPONENTS FOR REMOVAL AND
INSPECTION
EM±34±
ENGINE MECHANICAL Cylinder Head 
WhereEverybodyKnowsYourName

Page 1732 of 4087

LEXUS SC400 1991  Service Repair Manual 
COMPONENTS FOR REMOVAL AND
INSTALLATION (Contd)
±
ENGINE MECHANICAL Cylinder HeadEM±35 
WhereEverybodyKnowsYourName

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LEXUS SC400 1991  Service Repair Manual 
REMOVAL OF CYLINDER HEAD
(See Components on pages EM±34 and 35)1.  DISCONNECT HIGH±TENSION CORDS FROM SPARK PLUGS
(See steps 1 to 8 on pages EM±10 and 11)
2. REMOVE SPARK PLUGS (See step 2 on page

Page 1734 of 4087

LEXUS SC400 1991  Service Repair Manual 
8.  REMOVE WATER BY±PASS OUTLET AND NO. 1 WATERBY±PASS PIPE
(a)  Remove the two bolts, water by±pass outlet and No. 1water by±pass pipe.
(b)  Remove the three O±rings from the water by±pass out

Page 1735 of 4087

LEXUS SC400 1991  Service Repair Manual 
(b)  Disconnect the following hoses:(1) Vacuum hose from brake booster union
(2) Vacuum hose (from ACIS vacuum tank)
(3) Vacuum sensing hose
(4) Air hose (from PS air control valve)
(c)  Remove the t

Page 1736 of 4087

LEXUS SC400 1991  Service Repair Manual 
17. REMOVE NO. 3, No. 1 AND NO. 2 CYLINDER HEADCOVERS
(a)  Remove the 12 bolts and four nuts.
(b)  Remove the cylinder head covers and gaskets.
18.  REMOVE CAMSHAFT TIMING PULLEYS Hold the hexagon po