Lexus SC300 / Lexus SC400. Service manual — part 462

REPLACEMENT OF CRANKSHAFT OIL
SEALS

1.

REPLACE CRANKSHAFT FRONT OIL SEAL
HINT: There are two methods, A and B, to replace the oil seal
as follows:

A.

If oil pump is removed from cylinder block:
(a) Using a screwdriver, pry out the oil seal.

(b) Using SST and a hammer, tap in a new oil seal until its

surface is flush with the oil pump body edge.

SST 09316–60010 (09316–00010)
(c) Apply MP grease to the oil seal lip.

B.

If oil pump is installed on cylinder block:
(a) Using a knife, cut off the oil seal lip.
(b) Using a screwdriver, pry out the oil seal.
NOTICE: Be careful not to damage the crankshaft. Tape
the screwdriver tip.

(c) Apply MP grease to a new oil seal lip.
(d) Using SST and a hammer, tap in the oil seal until its

surface is flush with the oil pump body edge.

SST 09316 60010 (09316–00010)

EM–92

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ENGINE MECHANICAL

Cylinder Block

2.

REPLACE CRANKSHAFT REAR OIL SEAL
HINT: There are two methods, A and B, to replace the oil seal
as follows:

A.

If rear oil seal retainer is removed from cylinder block:
(a) Using a screwdriver and hammer, tap out the oil seal.

(b) Using SST and a hammer, tap in a new oil seal until its

surface is flush with the rear oil seal retainer edge.

SST 09223–15030, 09608–30022 (09608–05010)
(c) Apply MP grease to the oil seal lip.

B.

If rear oil seal retainer is installed on cylinder block:
(a) Using a knife, cut off the oil seal lip.
(b) Using a screwdriver, pry out the oil seal.
NOTICE: Be careful not to damage the crankshaft.
Tape the screwdriver tip.

(c) Apply MP grease to a new oil seal lip.
(d) Using SST and a hammer, tap in the oil seal until its

surface is flush with the rear oil seal retainer edge.

SST 09223–15030, 09608–30022 (09608–05011)

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ENGINE MECHANICAL

Cylinder Block

EM–93

ASSEMBLY OF PISTON AND
CONNECTING ROD ASSEMBLIES

1.

ASSEMBLE PISTON AND CONNECTING ROD
(a) Install a new snap ring at one end of the piston pin hole.
HINT: Be sure that end gap of the snap ring is not aligned with
the pin hole cutout portion of the piston.

(b) Gradually heat the piston to about 80

C (176

F).

(c) Coat the piston pin with engine oil..
(d) Align the front marks of the piston and connecting rod,

and push in the piston pin with your thumb.

(e) Install a new snap ring at the other end of the piston pin

hole.

HINT: Be sure that end gap of the snap ring is not aligned with
the pin hole cutout portion of the piston.

2. INSTALL

PISTON

RINGS

(a) Install the oil ring expander and two side rails by hand.

EM–94

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ENGINE MECHANICAL

Cylinder Block

(b) Using a piston ring expander, install the two

compression rings with the code mark facing up.

Code mark:

No.1 1T

No.2 2T

(c) Position the piston rings so that the ring ends are as

shown.

NOTICE: Do not align the piston ring ends.

3. INSTALL

BEARINGS

(a) Align the bearing claw with the groove of the connecting

rod and connecting cap.

(b) Install the bearings in the connecting rod and

connecting rod cap.

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ENGINE MECHANICAL

Cylinder Block

EM–95