Content .. 383 384 385 386 ..

Lexus SC300 / Lexus SC400. Manual - part 385

Mark “14”

72.014 mm (2.8352 in.)

Mark “15”

72.015 mm (2.8352 in.)

Mark “16”

72.016 mm (2.8353 in.)

Crankshaft main journal diameter (B):

Mark “00”

67.000 mm (2.8378 in.)

Mark “01”

66.999 mm (2.6378 in.)

Mark “02”

66.998 mm (2.6377 in.)

Mark “03”

66.997 mm (2.5377 in.)

Mark “04”

66.996 mm (2.6376 in.)

Mark “05”

66.995 mm (2.6376 in.)

Mark “06”

66.994 mm (2.6376 in.)

Mark “07”

66.993 mm (2.6375 in.)

Mark “08”

66.992 mm (2.6375 in.)

Mark “09”

66.991 mm (2.6374 in.)

Mark “10”

66.990 mm (2.6374 in.)

Mark “11”

66.989 mm (2.6374 in.)

Mark “12”

66.988 mm (2.6373 in.)

Standard sized bearing center wall thickness:

Mark “1”

2.486 – 2.489 mm (0.0979 – 0.0980 in.)

Mark “2”

2.489 – 2.492 mm (0.0980 – 0.0981 in.)

Mark “3”

2.492 – 2.495 mm (0.0981 – 0.0982 in.)

Mark “4”

2.495 – 2.498 mm (0.0982 – 0.0983 in.)

Mark “5”

2.498 – 2.501 mm (0.0983 – 0.0985 in.)

–

1UZ–FE ENGINE

ENGINE MECHANICAL

EG–163

Standard sized Bearing Selection Chart

ÑÑÑÑÑÑÑÑÑÑÑÑ

Crankshaft

number mark

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Cylinder block number mark

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

ÑÑ

ÑÑÑ

EXAMPLE: Cylinder block “06”, Crankshaft “08”

= Use bearing “3”

V01566

(l)

Remove the 10 bolts, 20 nuts and 5 main bearing caps. (See
procedure (a) to (c) above)

(m) Remove the 5 upper main bearings from the cylinder block.

HINT: Arrange the main bearing caps, bearings and thrust
washers in correct order.

EG–164

–

1UZ–FE ENGINE

ENGINE MECHANICAL

CYLINDER BLOCK INSPECTION AND
REPAIR

EG1KU–01

CLEAN CYLINDER BLOCK

A. Remove gasket material

Using a gasket scraper, remove all the gasket material from
the top surface of the cylinder block.

B. Clean cylinder block

Using a soft brush and solvent, thoroughly clean the cylinder
block.

NOTICE: If the cylinder is washed at high temperatures, the

cylinder liner sticks out beyond the cylinder block, so always

wash the cylinder block at temperature of 45

or less.

2. INSPECT TOP SURFACE OF CYLINDER BLOCK FOR

FLATNESS
Using a precision straight edge and feeler gauge, measure
the surface contacting the cylinder head gasket for warpage.

Maximum warpage:

0.07 mm (0.0028 in.)

If warpage is greater than maximum, replace the cylinder
block.

INSPECT CYLINDER FOR VERTICAL SCRATCHES
Visually check the cylinder for vertical scratches.
If deep scratches are present, replace the cylinder block.

–

1UZ–FE ENGINE

ENGINE MECHANICAL

EG–165

INSPECT CYLINDER BORE DIAMETER
HINT: There are 3 sizes of the standard cylinder bore diame-
ter, marked “1”, “2” and “3” accordingly. The mark is stamped
on the top of the cylinder block.

Using a cylinder gauge, measure the cylinder bore diameter
at positions A, B and C in the thrust and axial directions.

Standard diameter:

Mark “1”

87.500 – 87.510 mm (3.4449 – 3.4453 in.)

Mark “2”

87.510 – 87.520 mm (3.4453 – 3.4457 in.)

Mark “3”

87.520 – 87.530 mm (3.4457 – 3.4461 in.)

Maximum diameter:

87.73 mm (3.4539 in.)

If the diameter is greater than maximum, replace the cylinder
block.

REMOVE CYLINDER RIDGE
If the wear is less than 0.2 mm (0.008 in.), using a ridge ream-
er, grind the top of the cylinder.

INSPECT MAIN BEARING CAP STUD BOLTS
Using a vernier caliper, measure the tension portion diameter
of the stud bolt.

Standard diameter:

7.500 – 7.600 mm (0.2953 – 0.2992 in.)

Minimum diameter:

7.40 mm (0.2913 in.)

If the diameter is less than minimum, replace the stud bolt.

EG–166

–

1UZ–FE ENGINE

ENGINE MECHANICAL

Content .. 383 384 385 386 ..