Lexus RX300 (MCU15). Manual - part 435

A02338

5th

4th

3rd

2nd 6th

1st

A05064

1.27 mm
Hexagon
Wrench

A05065

A05066

1.27 mm
Hexagon
Wrench

EM–24

–

ENGINE MECHANICAL

TIMING BELT

LEXUS RX300   (RM785E)

7.

INSTALL TIMING BELT

NOTICE:
The engine should be cold.
(a)

Remove any oil or water on the pulleys, and keep them
clean.

NOTICE:
Only wipe the pulleys; do not use any cleansing agent.
(b)

Face the front mark on the timing belt forward.

(c)

Align the installation mark on the timing belt with the tim-
ing mark of the crankshaft timing pulley.

(d)

Align the installation marks on the timing belt with the tim-
ing marks of the camshaft timing pulleys.

(e)

Install the timing belt in this order: 
1st: Crankshaft timing pulley
2nd: Water pump pulley
3rd: LH camshaft timing pulley
4th: No. 2 idler pulley
5th: RH camshaft timing pulley
6th: No. 1 idler pulley

8.

SET TIMING BELT TENSIONER

(a)

Using a press, slowly press in the push rod using 981 –
9,807 N (100 – 1,000 kgf, 200 – 2,205 lbf) of pressure.

(b)

Align the holes of the push rod and housing, pass a 1.27
mm hexagon wrench through the holes to keep the set-
ting position of the push rod.

(c)

Release the press.

(d)

Install the dust boot to the tensioner.

9.

INSTALL TIMING BELT TENSIONER

(a)

Temporarily install the tensioner with the 2 bolts.

(b)

Alternately tighten the 2 bolts.
Torque: 27 N·m (280 kgf·cm, 20 ft·lbf)

(c)

Remove the 1.27 mm hexagon wrench from the tension-
er.

A05051

A05052

P12983

Length = 1410 mm (55.51 in.)

A05067

–

ENGINE MECHANICAL

TIMING BELT

EM–25

LEXUS RX300   (RM785E)

10.

CHECK VALVE TIMING

(a)

Slowly turn the crankshaft 2 revolutions, and align the tim-
ing marks of the crankshaft timing pulley and oil pump
body.

NOTICE:
Always turn the crankshaft clockwise.

(b)

Check that the timing marks of the RH and LH timing pul-
leys with the timing marks of the No. 3 timing belt cover
as shown in the illustration.

If the marks do not align, remove the timing belt and reinstall it.
(c)

Remove the crankshaft pulley bolt.

11.

INSTALL RH ENGINE MOUNTING BRACKET
Torque: 28 N·m (290 kgf·cm, 21 ft·lbf)

12.

INSTALL NO. 2 TIMING BELT COVER

(a)

Check that the timing belt cover gasket has no cracks or
peeling, etc.

If the gasket has cracks or peeling, etc., replace it using these
steps:

S

Using a screwdriver and gasket scraper, remove all
the old gasket material.

S

Thoroughly clean all components to remove all the
loose material.

S

Remove the backing paper from a new gasket and
install the gasket evenly to the part of the timing belt
cover shaded black in the illustration.

S

After installing the gasket, press down on it so that
the adhesive firmly sticks to the timing belt cover.

(b)

Install the timing belt cover with the 5 bolts.
Torque: 8.5 N·m (85 kgf·cm, 74 in.·lbf)

(c)

Install the engine wire protector clamps to the No.3 timing
belt cover.

13.

INSTALL TIMING BELT GUIDE

Install the timing belt guide, facing the cup side outward.

P12982

Length = 240 mm (9.45 in.)

Join
Line

Join
Line

Length = 460 mm

(18.11 in.)

A04693

SST

P18816

EM–26

–

ENGINE MECHANICAL

TIMING BELT

LEXUS RX300   (RM785E)

14.

INSTALL NO. 1 TIMING BELT COVER

(a)

Check that the timing belt cover gaskets have cracks or
peeling, etc.

If the gasket has cracks or peeling, etc., replace it using these
steps:

S

Using a screwdriver and gasket scraper, remove all
the old gasket material.

S

Thoroughly clean all components to remove all the
loose material.

S

Remove the backing paper from a new gasket and
install the gasket evenly to the part of the timing belt
cover shaded black in the illustration.

NOTICE:
When joining 2 gaskets, do not leave a gap between them.
Cut off any excess gasket.

S

After installing the gasket, press down on it so that
the adhesive firmly sticks to the timing belt cover.

(b)

Install the timing belt cover with the 4 bolts.
Torque: 8.5 N·m (85 kgf·cm, 74 in.·lbf)

15.

INSTALL CRANKSHAFT PULLEY

(a)

Align the pulley set key with the key groove of the pulley,
and slide on the pulley.

(b)

Using SST, install the pulley bolt.
SST

09213–54015 (91651–60855), 09330–00021

Torque: 215 N·m (2,200 kgf·cm, 159 ft·lbf)

16.

INSTALL NO. 2 ALTERNATOR BRACKET

Install the generator bracket with the pivot bolt and nut. Do not
tighten the bolt yet.

Torque: (Nut): 28 N·m (290 kgf·cm, 21 ft·lbf)

17.

INSTALL NO. 2 RH ENGINE MOUNTING BRACKET
AND ENGINE MOVING CONTROL ROD
(See page EM–82)

18.

CONNECT GROUND STRAP CONNECTORS

19.

INSTALL CRUISE CONTROL ACTUATOR

20.

INSTALL PS PUMP DRIVE BELT

21.

INSTALL ALTERNATOR DRIVE BELT

22.

INSTALL RH FENDER APRON SEAL

23.

INSTALL RH FRONT WHEEL

24.

INSTALL FRONT UPPER SUSPENSION BRACE
(See page EM–82)

25.

INSTALL OUTER COWL TOP PANEL
(See page EM–82)

26.

VEHICLE ROAD TEST

Check for abnormal noise, shock, slippage, correct shift points
and smoothly operation.

EM0B7–04

A14983

N·m (kgf·cm, ft·lbf)

: Specified torque

LH Wiper Arm and Blade Assembly

Hood to Cowl Top Seal

Wiper Motor with Wiper Link

Outer Cowl Top Panel

x 6

Wiper Motor Connector

24 (245, 18)

RH Cowl Top
Ventilator Louver

LH Cowl Top Ventilator Louver

RH Wiper Arm and Blade Assembly

–

ENGINE MECHANICAL

CYLINDER HEAD

EM–27

LEXUS RX300   (RM785E)

CYLINDER HEAD

COMPONENTS