Lexus RX300 (MCU15). Manual — part 437
A05703
Adjusting Shim
Valve Lifter
Keeper
Spring Retainer
Valve Spring
Spring Seat
z Oil Seal
Valve
z Valve Guide Bushing
LH Cylinder Head Cover
LH Intake
Camshaft
Snap Ring
Camshaft Sub–Gear
LH Exhaust
Camshaft
RH Cylinder Head Cover
Gasket
RH Intake
Camshaft
Camshaft Sub–Gear
Camshaft Gear Spring
RH Exhaust
Camshaft
Wave Washer
Semi–Circular Plug
Semi–Circular
Plug
LH Cylinder Head
Camshaft
Bearing Cap
z Camshaft Oil Seal
RH Cylinder Head
z RH Cylinder
Head Gasket
z LH Cylinder Head Gasket
18 (185, 13)
x8
16 (160, 12)
See Page EM–60
1st 54 (550,40)
2nd Turn 90°
N·m (kgf·cm, ft·lbf)
: Specified torque
z Non–reusable part
z Spark Plug
Tube Gasket
Wave Washer
Gasket
Snap Ring
Camshaft Gear Spring
Oil Control Valve Filter
z Gasket
Camshaft Timing
Gear (VVT–i)
z Gasket
z Gasket
Oil Control
Valve Filter
Cylinder Head
Rear Cover
Cylinder Head
Rear Cover
z Gasket
150 (1,530, 110)
NOTICE:
Camshaft
Do not remove or install the camshaft timing
gear (VVT–i) beside changing VVT–i or the
camshaft.
z
EM–32
–
ENGINE MECHANICAL
CYLINDER HEAD
LEXUS RX300 (RM785E)
EM0B8–04
A05071
5 mm
Hexagon
Wrench
A05270
(2)
(1)
(3)
(4)
–
ENGINE MECHANICAL
CYLINDER HEAD
EM–33
LEXUS RX300 (RM785E)
REMOVAL
NOTICE:
Do not remove or install the camshaft timing gear (VVT–i)
beside changing VVT–i or the camshaft.
1.
REMOVE OUTER COWL TOP PANEL
(See page EM–75)
2.
DRAIN ENGINE COOLANT
3.
REMOVE RH FENDER APRON SEAL
4.
REMOVE ALTERNATOR DRIVE BELT
(See page CH–6)
5.
REMOVE PS PUMP (See page SR–22)
6.
REMOVE FRONT EXHAUST PIPE
(See page EM–75)
7.
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.
8.
REMOVE AIR CLEANER CAP AND CASE ASSEMBLY
(See page EM–75)
9.
REMOVE CRUISE CONTROL ACTUATOR
10.
REMOVE FRONT UPPER SUSPENSION BRACE
(See page EM–75)
11.
REMOVE AIR INTAKE CHAMBER ASSEMBLY
(a)
Disconnect the accelerator cable.
(b)
Disconnect the throttle position sensor connector and
clamps.
(c)
Disconnect the ISC valve connector.
(d)
Disconnect the No. 1 VSV connector for ACIS.
(e)
Disconnect the No. 2 VSV connector for ACIS.
(f)
Disconnect the VSV connector for EVAP.
(g)
Remove the 3 bolts, and disconnect the PS pressure tube
from the air intake chamber, chamber stay and No. 1 en-
gine hanger.
(h)
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
A14992
(9)
(7)
(8)
(6)
(5)
A05072
Chamber Stay
Engine
Hanger
A14993
8 mm Hexagon Wrench
A05074
(2)
(1)
A05075
EM–34
–
ENGINE MECHANICAL
CYLINDER HEAD
LEXUS RX300 (RM785E)
(5)
2 water bypass hoses from throttle body
(6)
Air assist hose from throttle body
(7)
Purge 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
(i)
Remove the 2 bolts and No. 1 engine hanger.
(j)
Remove the 2 bolts and air intake chamber stay.
(k)
Using an 8 mm hexagon wrench, remove the 2 bolts, 2
nuts, the air intake chamber assembly and gasket.
12.
REMOVE INTAKE MANIFOLD ASSEMBLY
(a)
Disconnect the 6 injector connectors.
(b)
Disconnect the fuel inlet hose from fuel pipe.
CAUTION:
Perform disconnecting operations of the fuel tube connec-
tor (quick type) after observing the precautions.
(See page FI–1)
(c)
Disconnect the heater hose from intake manifold.
(d)
Remove the 9 bolts, 2 nuts, 2 plate washers, the intake
manifold, delivery pipes and injectors assembly.
A05076
Gasket
A05077
Clamp
Clamp
Clamp
A05206
A05187
–
ENGINE MECHANICAL
CYLINDER HEAD
EM–35
LEXUS RX300 (RM785E)
13.
REMOVE WATER OUTLET
(a)
Disconnect the water temperature sensor connector.
(b)
Disconnect the ground strap connector.
(c)
Disconnect the radiator hose.
(d)
Remove the 2 bolts, 2 nuts and 2 plate washers.
(e)
Disconnect the water bypass hose, and remove the water
outlet.
(f)
Remove the 2 gaskets.
14.
REMOVE IGNITION COILS
15.
REMOVE SPARK PLUGS
16.
REMOVE TIMING BELT
(See page EM–16)
17.
REMOVE CAMSHAFT TIMING PULLEYS
(See page EM–16)
18.
REMOVE NO. 2 IDLER PULLEY
(See page EM–16)
19.
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.
20.
REMOVE CAMSHAFT POSITION SENSORS
21.
REMOVE CAMSHAFT TIMING OIL CONTROL VALVES
22.
DISCONNECT ENGINE WIRE PROTECTOR FROM
REAR SIDE
Remove the nut, and disconnect the engine wire protector from
the RH cylinder head.
23.
DISCONNECT ENGINE WIRE AND PROTECTOR
FROM RH SIDE
Remove the 3 nuts and 2 clamps, and disconnect the engine
wire protector from the RH cylinder head cover.
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