Lexus RX300 (MCU15). Service manual — part 431
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
AL
VE CLEARANCE
LEXUS
RX300 (RM785E)
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
AL
VE CLEARANCE
EM–9
LEXUS
RX300 (RM785E)
A05071
EM0KH–02
D09456
A05417
Lead Wire
A05186
E1
TE1
Check Connector
SST
Check Connector
A05184
EM–10
–
ENGINE MECHANICAL
IGNITION TIMING
LEXUS RX300 (RM785E)
IGNITION TIMING
INSPECTION
1.
REMOVE V–BANK COVER
(a)
Using a 5 mm hexagon wrench, remove the 3 nuts.
(b)
Remove the V–bank cover fastener clip and V–bank cov-
er.
2.
WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
3.
CONNECT HAND–HELD TESTER
(a)
Connect the hand–held tester to the DLC3.
(b)
Please refer to the hand–held tester operator’s manual
for further details.
4.
CONNECT TIMING LIGHT TO ENGINE
Connect the tester probe of a timing light to the lead wire as
shown.
5.
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
6.
INSPECT IGNITION TIMING
(a)
Using SST, connect terminals TE1 and E1 of the check
connector.
SST
09843–18020
(b)
Using a timing light, check the ignition timing.
Ignition timing: 8 – 12° BTDC @ idle
(Transmission in neutral range)
(c)
Remove the SST from the check connector.
SST
09843–18020
7.
FURTHER CHECK IGNITION TIMING
Ignition timing: 10 – 25° BTDC @ idle
(Transmission in neutral range)
HINT:
The timing mark moves in a range between 10
° and 25°.
–
ENGINE MECHANICAL
IGNITION TIMING
EM–11
LEXUS RX300 (RM785E)
8.
DISCONNECT TIMING LIGHT FROM ENGINE
9.
DISCONNECT HAND–HELD TESTER
10.
REINSTALL V–BANK COVER
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