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
)
13.
CONNECT RADIATOR HOSE TO WATER OUTLET
14.
REINSTALL IGNITION COILS
15.
REINSTALL AIR INTAKE CHAMBER ASSEMBLY
(See page
)
16.
INSTALL HIGH–TENSION CORD SET
(See page
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
)
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