Lexus ES300 (1997 year). Service manual - part 456

P13072

RH EX

RH IN

LH IN

LH EX

3 3

2 2

Front

5 5

4 4

P13073

RH EX

RH IN

LH IN

LH EX

Front

5 5

4 4

6 6

1 1

P12919

Upward

Notch

–

ENGINE MECHANICAL

VALVE CLEARANCE

EM–5

742

1997 LEXUS ES300   (RM511U)

(b)

Turn the crankshaft 2/3 of a revolution (240

°

), and check

only the valves indicated in the illustration. Measure the
valve clearance. (See procedure step (a))

(c)

Turn the crankshaft a further 2/3 of a revolution (240

°

),

and check only the valves indicated in the illustration.
Measure the valve clearance.
(See procedure step (a))

11.

ADJUST VALVE CLEARANCE

(a)

Remove the adjusting shim.

Turn the camshaft so that the cam lobe for the valve
to be adjusted faces up.

Turn the valve lifter with a screwdriver so that the
notches are perpendicular to the camshaft.

Z09456

Front of No.1 and No.2 Cylinders

Others

SST (A)

SST (A)

SST (B)

SST (B)

P12920

SST (B)

Magnetic Finger

EM0494

EM–6

–

ENGINE MECHANICAL

VALVE CLEARANCE

743

1997 LEXUS ES300   (RM511U)

Using SST (A), press down the valve lifter and place
SST (B) between the camshaft and valve lifter. Re-
move SST (A).

SST

09248–55040 (09248–05410, 09248–05420)

HINT:

Apply SST (B) at a slight angle on the side marked with
”9” or ”7”, at the position shown in the illustration.

When SST (B) is inserted too deeply, it will get pinched by
the shim. To prevent it from being stuck, insert it gently
from the intake side, at a slight angle.

Using a small screwdriver and magnetic finger, remove
the adjusting shim.

(b)

Determine the replacement adjusting shim size according
to these Formula or Charts:

Using a micrometer, measure the thickness of the
removed shim.

Calculate the thickness of a new shim so the valve
clearance comes within the specified value.

T .......... Thickness of used shim
A .......... Measured valve clearance
N .......... Thickness of new shim
Intake: N = T + (A – 0.20 mm (0.008 in.))
Exhaust: N = T + (A – 0.30 mm (0.012 in.))

Select a new shim with a thickness as close as pos-
sible to the calculated values.

HINT:
Shims are available in 17 sizes in increments of 0.050 mm
(0.0020 in.), from 2.500 mm (0.0984 in.) to 3.300 mm (0.1299
in.).

P12979

SST (B)

SST (A)

–

ENGINE MECHANICAL

VALVE CLEARANCE

EM–7

744

1997 LEXUS ES300   (RM511U)

(c)

Install a new adjusting shim.

Place a new adjusting shim on the valve lifter, with
imprinted numbers facing down.

Press down the valve lifter with SST (A), and re-
move SST (B).

SST

09248–55040 (09248–05410, 09248–05420)

(d)

Recheck the valve clearance.

12.

REINSTALL CYLINDER HEAD COVERS
(See page 

EM–52

)

13.

CONNECT RADIATOR HOSE TO WATER OUTLET

14.

REINSTALL IGNITION COILS

15.

REINSTALL AIR INTAKE CHAMBER ASSEMBLY
(See page 

EM–52

)

16.

INSTALL HIGH–TENSION CORD SET
(See page 

IG–1

)

17.

INSTALL V–BANK COVER

18.

REFILL WITH ENGINE COOLANT

19.

START ENGINE AND CHECK FOR LEAKS

20.

REINSTALL RH FENDER APRON SEAL

V00719

Adjusting Shim Selection Chart (Intake)

Intake valve clearance (Cold):

0.15 – 0.25 mm (0.006 – 0.010 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.12
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.)

EM–8

–

ENGINE MECHANICAL

V

A

L

VE CLEARANCE

745

1997

 L

EXUS ES300   (RM51

1

U

)