Lexus ES300 (1997 year). Manual — part 457

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.)

Thickness

Thickness

Shim

No.

Shim

No.

ters imprinted on the face.

HINT: New shims have the thickness in millime–

Installed shim thickness

Measured clearance

mm (in.)

mm (in.)

–

ENGINE MECHANICAL

V

A

L

VE CLEARANCE

EM–9

746

1997

L

EXUS ES300 (RM51

1

U

)

S05456

LEXUS
Hand–Held Tester

EM03W–02

S04529

DLC1

E1

SST

DLC1

TE1

P18806

EM–10

–

ENGINE MECHANICAL

IGNITION TIMING

747

1997 LEXUS ES300 (RM511U)

IGNITION TIMING

INSPECTION

1.

WARM UP ENGINE

Allow the engine to warm up to normal operating temperature.
2.

CONNECT LEXUS HAND–HELD TESTER OR OBDII
SCAN TOOL

(a)

Connect the LEXUS hand–held tester or OBDII scan tool
to the DLC3.

(b)

Please refer to the LEXUS hand–held tester or OBDII
scan tool operator’s manual for further details.

3.

CONNECT TIMING LIGHT TO ENGINE

Connect the tester probe of a timing light to the No.1 high–ten-
sion cord for No.4 cylinder.
4.

CHECK IDLE SPEED

(a)

Race the engine speed at 2,500 rpm for approx. 90 se-
conds.

(b)

Check the idle speed.
Idle speed: 700

±

50 rpm

5.

INSPECT IGNITION TIMING

(a)

Using SST, connect terminals TE1 and E1 of the DLC1.
SST

09843–18020

(b)

Using a timing light, check the ignition timing.
Ignition timing:
8 – 12

°

BTDC @ idle

(Transmission in neutral position)

(c)

Remove the SST from the DLC1.
SST

09843–18020

6.

FURTHER CHECK IGNITION TIMING
Ignition timing:
7 – 24

°

BTDC @ idle

(Transmission in neutral position)

HINT:
The timing mark moves in a range between 7

°

and 24

°

.

7.

DISCONNECT TIMING LIGHT FROM ENGINE

8.

DISCONNECT LEXUS HAND–HELD TESTER OR
OBDII SCAN TOOL

EM03X–03

–

ENGINE MECHANICAL

IDLE SPEED

EM–11

748

1997 LEXUS ES300 (RM511U)

IDLE SPEED

INSPECTION

1.

INITIAL CONDITIONS

(a)

Engine at normal operating temperature

(b)

Air cleaner installed

(c)

All pipes and hoses of air induction system connected

(d)

All accessories switched OFF

(e)

All vacuum lines properly connected

HINT:
All vacuum hoses for EGR system, etc. should be properly connected.
(f)

SFI system wiring connectors fully plugged

(g)

Ignition timing check correctly

(h)

Transmission in neutral position

2.

CONNECT LEXUS HAND–HELD TESTER OR OBDII SCAN TOOL (See page

EM–10

)

3.

INSPECT IDLE SPEED

(a)

Race the engine speed at 2,500 rpm for approx. 90 seconds.

(b)

Check the idle speed.
Idle speed: 700

±

50 rpm

If the idle speed is not as specified, check the IAC valve and air intake system.
4.

DISCONNECT LEXUS HAND–HELD TESTER OR OBDII SCAN TOOL

EM03Y–04

S04770

S04770

RH Fender Apron Seal

Generator Drive Belt

Engine Moving
Control Rod

RH Engine Mounting Stay

No.2 RH Engine

Mounting Bracket

Ground Strap

PS Pump Drive Belt

Engine Coolant Reservoir Hose

64 (650, 47)

32 (320, 23)

N·m (kgf·cm, ft·lbf)

: Specified torque

EM–12

–

ENGINE MECHANICAL

TIMING BELT

749

1997 LEXUS ES300 (RM511U)

TIMING BELT

COMPONENTS