Lexus ES300 (1997 year). Manual - part 462

Z19041

Adjusting Shim

Valve Lifter
Keeper
Spring Retainer

Valve Spring

Spring Seat



 Oil Seal

Valve



 Valve Guide Bushing

LH Cylinder Head Cover

Gasket

Wave Washer

Camshaft Gear

Spring



 Spark Plug

Tube Gasket

LH Intake Camshaft

Snap Ring

Camshaft

Sub–Gear

LH Exhaust Camshaft

RH Cylinder Head Cover

Gasket

RH Intake Camshaft

Camshaft Sub–Gear

Snap Ring

Camshaft Gear Spring

RH Exhaust

Camshaft

Wave Washer

Semi–Circular Plug

Semi–Circular
Plug

LH Cylinder Head

Camshaft

Bearing cap



 Camshaft Oil Seal

RH Cylinder
Head



 RH Cylinder

Head Gasket



 LH Cylinder Head

Gasket

18 (185, 13)

x8

16 (160, 12)

See Page

EM–52

1st 54 (550,40)

2nd Turn 90

°

N·m (kgf·cm, ft·lbf)

: Specified torque



 Non–reusable part

–

ENGINE MECHANICAL

CYLINDER HEAD

EM–29

766

1997 LEXUS ES300   (RM511U)

EM043–02

S05625

5 mm

Hexagon
Wrench

Clip

S05034

(2)

(1)

(3)

S05049

(6)

(4)

(9)

(7)

(5)

(8)

EM–30

–

ENGINE MECHANICAL

CYLINDER HEAD

767

1997 LEXUS ES300   (RM511U)

REMOVAL

1.

REMOVE ENGINE RH FENDER APRON SEAL

2.

DRAIN ENGINE COOLANT

3.

REMOVE AIR CLEANER CAP ASSEMBLY AND AIR
FILTER

4.

REMOVE FRONT EXHAUST PIPE
(See page 

EM–66

)

5.

REMOVE RH ENGINE MOUNTING STAY

6.

REMOVE V–BANK COVER

(a)

Using a 5 mm hexagon wrench, remove the 2 nuts.

(b)

Disconnect the 2 clips, and remove the cover.

7.

REMOVE HIGH–TENSION CORD SET
(See page 

IG–1

)

8.

REMOVE AIR INTAKE CHAMBER ASSEMBLY

(a)

Disconnect these cables and connectors:

Accelerator cable

A/T throttle cable

Throttle position sensor connector

IAC valve connector

EGR gas temperature sensor connector

EGR valve position sensor connector

VSV connector for ACIS

VSV connector for EVAP

VSV connector for EGR

DLC1 from bracket on intake air control valve

(b)

Remove the 2 nuts, and disconnect the PS pressure tube
from the No.1 engine hanger.

(c)

Disconnect the hoses, cables, strap and clamp:
(1)

PCV hose from PCV valve on RH cylinder head

(2)

Ground strap and cable from intake air control valve
for ACIS

(3)

Ground cable from air intake chamber

(4)

Brake booster vacuum hose from air intake
chamber

(5)

2 water bypass hoses from throttle body

(6)

Air assist hose from throttle body

(7)

EVAP hose from pipe on emission control valve set

(8)

2 vacuum hoses from vacuum tank for ACIS

(9)

Engine wire clamp from emission control valve set

S04790

Chamber Stay

EGR
Pipe

Engine

Hanger

S04791

8 mm Hexagon
Wrench

S04788

(2)

(1)

S04580

P20049

Gasket

–

ENGINE MECHANICAL

CYLINDER HEAD

EM–31

768

1997 LEXUS ES300   (RM511U)

(d)

Remove the 2 bolts and No.1 engine hanger.

(e)

Remove the 2 bolts and air intake chamber stay.

(f)

Remove the 4 nuts, No.2 EGR pipe and 2 gaskets.

(g)

Using an 8 mm hexagon wrench, remove the 2 bolts, 2
nuts, the air intake chamber assembly and gasket.

9.

REMOVE INTAKE MANIFOLD ASSEMBLY

(a)

Disconnect the 6 injector connectors.

(b)

Disconnect these hoses:
(1)

Fuel inlet hose from fuel filter

CAUTION:
Perform disconnecting operations of the fuel tube connec-
tor (quick type) after observing the precaution.
(See page 

SF–1

)

(2)

Heater hose from intake manifold

(c)

Remove the 9 bolts, 2 nuts, 2 plate washers, the intake
manifold, delivery pipes and injectors assembly.

10.

REMOVE WATER OUTLET

(a)

Disconnect these connectors, (strap) and hoses:

ECT sender gauge connector

ECT sensor connector

Ground strap (connector)

Radiator hose

Engine coolant reservoir hose

(b)

Remove the 2 bolts, 2 nuts and 2 plate washers.

P18772

Clamp

Clamp

Clamp

S04786

S04787

P18767

EM–32

–

ENGINE MECHANICAL

CYLINDER HEAD

769

1997 LEXUS ES300   (RM511U)

(c)

Disconnect the water bypass hose, and remove the water
outlet.

(d)

Remove the 2 gaskets.

11.

REMOVE GENERATOR DRIVE BELT
(See page 

CH–6

)

12.

REMOVE PS PUMP
(See page 

SR–20

)

13.

REMOVE IGNITION COILS

14.

REMOVE SPARK PLUGS

15.

REMOVE TIMING BELT
(See page 

EM–14

)

16.

REMOVE CAMSHAFT TIMING PULLEYS
(See page 

EM–14

)

17.

REMOVE NO.2 IDLER PULLEY
(See page 

EM–14

)

18.

REMOVE NO.3 TIMING BELT COVER

(a)

Disconnect the 3 engine wire clamps from the timing belt
cover.

(b)

Remove the 6 bolts and timing belt cover.

19.

DISCONNECT ENGINE WIRE PROTECTOR FROM
REAR SIDE

Remove the 2 nuts, and disconnect the engine wire protector
from the RH cylinder head and water inlet.

20.

DISCONNECT ENGINE WIRE AND PROTECTOR
FROM RH SIDE

Remove the 5 nuts, and disconnect the engine wire and protec-
tor from the RH cylinder head cover.

21.

DISCONNECT ENGINE WIRE PROTECTOR FROM LH
SIDE

Remove the 2 bolts, and disconnect the engine wire protector
from the LH cylinder head cover.