1991 LEXUS SC400 Service Repair Manual

Page 2569 of 4087

LEXUS SC400 1991  Service Repair Manual 
REPLACEMENT OF CRANKSHAFT
FRONT OIL SEAL
(See page EM±152)
ASSEMBLY OF OIL PUMP
(See Components on page  LU±12)
1.  INSTALL DRIVE AND DRIVEN ROTORS (a) Place  the drive and driven rotors into oil p

Page 2570 of 4087

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

Page 2571 of 4087

LEXUS SC400 1991  Service Repair Manual 
(e)  Install the oil pump with the eight bolts.
Torque:12 mm head 16 N Vm (160 kgf Vcm, 12 ft Vlbf)
14 mm head 30 N Vm (310 kgf Vcm, 22 ft Vlbf)
HINT: Each bolt length is indicated in the illustratio

Page 2572 of 4087

LEXUS SC400 1991  Service Repair Manual 
5.  INSTALL NO.1 OIL PAN(a)  Remove any old packing (FIPG) material and be carefulnot to drop any oil on the contact surfaces of the No.1
oil pan and cylinder block.
w Using a razor blade and gasket

Page 2573 of 4087

LEXUS SC400 1991  Service Repair Manual 
6.  INSTALL OIL PAN BAFFLE PLATEInstall the baffle plate with the six bolts and two nuts.
Torque: 7.8 N Vm (80 kgf Vcm, 69 in. Vlbf)
HINT: Use bolts 14 mm (0.55 in.) in length.
7.  INSTALL NO.2 OIL P

Page 2574 of 4087

LEXUS SC400 1991  Service Repair Manual 
8.  INSTALL OIL LEVEL SENSOR(a)  Install a new gasket to the level sensor.
(b)  Install the level sensor with the four bolts.
Torque: 5.4 N Vm (55 kgf Vcm, 48 in. Vlbf)
HINT: Use bolts 16 mm (0.63 in

Page 2575 of 4087

LEXUS SC400 1991  Service Repair Manual 
SERVICE SPECIFICATIONS
SERVICE DATA
Oil pressureat idling29 kPa (0.3 kgf/cm2, 4.3 psi) or more
at 3,000 rpm 294±588 kPa
(3.0±6.0 kgf/cm2, 43±85 psi)
Oil pumpTip clearanceSTD0.110±0.240 mm0.0043±

Page 2576 of 4087

LEXUS SC400 1991  Service Repair Manual 
STARTING SYSTEM
STARTING SYSTEM
NOTE: The specification descriptions ºUSA Spec.º and
º Exc. USA Spec. º used in this section indicate the following
specifications.
USA Spec .: USA (50 States) Spe