Lexus GS300/400 (2000 year). Manual — part 141

V00720

Adjusting Shim Selection Chart (Exhaust)

Exhaust valve clearance (Cold):
0.25 – 0.35 mm (0.010 – 0.014 in.)

EXAMPLE: The 2.800 mm (0.1102 in.) shim is installed, and
the measured clearance is 0.450 mm (0.0177 in.).
Replace the 2.800 mm (0.1102 in.) shim with a new No.10 shim.

New shim thickness mm (in.)

Shim
No.

Thickness

Thickness

Shim
No.

HINT: New shims have the thickness
in millimeters imprinted on the face.

Installed Shim Thickness
mm (in.)

Measured Clearance
mm (in.)

–

ENGINE MECHANICAL

(2JZ–GE)

V

A

L

VE CLEARANCE

EM–1

1

1365

2000

LEXUS GS300/GS400 (RM718U)

EM0DE–03

P02185

Adhesive Width
2 – 3 mm

Adhesive

10 mm

Z08040

Protrusion

A02704

A02686

(e) (d) (c)

(b)

EM–50

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

1404

REASSEMBLY

HINT:

Thoroughly clean all parts to be assembled.

Before installing the parts, apply fresh engine oil to all slid-
ing and rotating surfaces.

Replace all gaskets and oil seals with new ones.

1.

INSTALL HEATER UNION

HINT:
When using a new cylinder head, a new heater union must be
installed.
(a)

Apply adhesive to the end of the heater union as shown
in the illustration.
Adhesive: Part No.08833–00070, THREE BOND 1324
or equivalent

(b)

Using a wooden block and hammer, tap in a new heater
union, leaving 48 mm (1.89 in.) protruding from the cylin-
der head.

NOTICE:
Do not tap it in too far.

2.

INSTALL VALVES

(a)

Install a new oil seal on the valve guide bushing.

(b)

Install the valve.

(c)

Install the spring seat.

(d)

Install the valve spring.

(e)

Install the spring retainer.

A02715

SST

A02702

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

EM–51

1405

(f)

Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST

09202–70020 (09202–00010)

(g)

Using a plastic–faced hammer, lightly tap the valve stem
tip to assure proper fit.

3.

INSTALL VALVE LIFTERS AND SHIMS

(a)

Install the valve lifter and shim.

(b)

Check that the valve lifter rotates smoothly by hand.

4.

INSTALL ECT SENSOR
Torque: 19.6 N·m (200 kgf·cm, 14 ft·lbf)

5.

INSTALL CAMSHAFT POSITION SENSOR

6.

INSTALL ENGINE HANGER
Torque: 40 N·m (400 kgf·cm, 30 ft·lbf)

7.

INSTALL WATER OUTLET WITH WATER BYPASS
HOSE

Install a new gasket and the water outlet with the bolt and 2
nuts.

Torque: 28 N·m (280 kgf·cm, 21 ft·lbf)

EM0DF–04

S02567

S02651

10 mm
Bi–Hexagon
Wrench

12

8

4

2

5

9

13

14

10

11

6

1

3

7

S02643

Front

90

°

Painted Mark

90

°

90

°

90

°

A02699

Knock Pin

Up

Up

EM–52

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

1406

INSTALLATION

1.

PLACE CYLINDER HEAD ON CYLINDER BLOCK

(a)

Place a new cylinder head gasket in position on the cylin-
der block.

NOTICE:
Be sure to install it correctly.
(b)

Place the cylinder head in position on the cylinder head
gasket.

2.

INSTALL CYLINDER HEAD BOLTS

HINT:

The cylinder head bolts are tightened in 2 progressive
steps (steps (c) and (f)).

If any of bolts break or deform, replace them.

(a)

Apply a light coat of engine oil on the threads and under
the heads of the cylinder head bolts.

(b)

Install the 14 plate washers to each cylinder head bolt.

(c)

Using a 10 mm bi–hexagon wrench, uniformly tighten the
cylinder head bolts, in several passes, in the sequence
shown.
Torque: 35 N·m (350 kgf·cm, 26 ft·lbf)

If any of the bolts do not meet the torque specification, replace
the bolt.

(d)

Mark the front of the cylinder head bolt head with paint.

(e)

Retighten the cylinder head bolts 90

°

in the numerical or-

der shown.

(f)

Retighten cylinder head bolts by an additional 90

°

shown.

(g)

Check that the painted mark is now turned to the rear.

3.

INSTALL CAMSHAFTS

(a)

Apply engine oil to the thrust portion of the camshaft.

(b)

Place the camshaft on the cylinder head with the cam
lobe facing up as shown.