1991 LEXUS SC400 Service Repair Manual

Page 2561 of 4087

LEXUS SC400 1991  Service Repair Manual 
REPLACEMENT OF ENGINE OIL
AND OIL FILTER
CAUTION:
wProlonged and repeated contact with mineral oil will
result in the  removal of natural fats from the skin, leading
to dryness, irritation and dermat

Page 2562 of 4087

LEXUS SC400 1991  Service Repair Manual 
(d)  Tighten the oil filter by hand until the rubber gasketcontacts  the  seat of the filter mounting. Then using SST,
give it an additional 3/4 turn to seat the oil filter.
SST 09228±07500
3.  FILL

Page 2563 of 4087

LEXUS SC400 1991  Service Repair Manual 
OIL PUMP
COMPONENTS FOR REMOVAL AND
INSTALLATION
LU±8±
LUBRICATION SYSTEM Oil Pump 
WhereEverybodyKnowsYourName

Page 2564 of 4087

LEXUS SC400 1991  Service Repair Manual 
REMOVAL OF OIL PUMP
(See Components on page LU±8)
HINT: When repairing the oil pump, the oil pan and strainer
should be removed and cleaned.
1.  REMOVE ENGINE WITH TRANSMISSION (See pages  EM±118 t

Page 2565 of 4087

LEXUS SC400 1991  Service Repair Manual 
(b)  Insert the blade of SST between the No.1 and No.2 oilpan,  cut off applied sealer and remove the No.1 oil pan.
SST 09032±00100
NOTICE:
w Be careful not to damage the No.2 oil pan contact surfac

Page 2566 of 4087

LEXUS SC400 1991  Service Repair Manual 
12.  REMOVE OIL STRAINERRemove the two bolts, two nuts, oil strainer and gasket.
13.  REMOVE OIL FILTER BRACKET (a)  Disconnect the oil pressure switch connector.
(b)  Remove the two bo lts, stud bol

Page 2567 of 4087

LEXUS SC400 1991  Service Repair Manual 
COMPONENTS FOR DISASSEMBLY AND
ASSEMBLY OF OIL PUMP
DISASSEMBLY OF OIL PUMP
1.  REMOVE RELIEF VALVEUsing snap ring pliers, remove the snap ring and following
parts:(1) Retainer
(2) Compression spring

Page 2568 of 4087

LEXUS SC400 1991  Service Repair Manual 
INSPECTION OF OIL PUMP
1.  INSPECT RELIEF VALVECoat the valve with engine oil and check that it falls smoothly
into the valve hole by its own weight.
If it doesnt, replace the relief valve. If neces