Lexus RX300 (MCU15). Manual — part 434

EM0B5–02

EM3336

NO!

B00635

P12604

EM–20

–

ENGINE MECHANICAL

TIMING BELT

LEXUS RX300 (RM785E)

INSPECTION

1.

INSPECT TIMING BELT

NOTICE:

S

Do not bend, twist or turn the timing belt inside out.

S

Do not allow the timing belt to come into contact with
oil, water or steam.

S

Do not utilize timing belt tension when installing or re-
moving the mount bolt of the camshaft timing pulley.

If there are any defects, as shown in the illustrations, check
these points:
(a)

Premature parting

S

Check for proper installation.

S

Check the timing cover gasket for damage and
proper installation.

(b)

If the belt teeth are cracked or damaged, check to see if
either camshaft is locked.

(c)

If there is noticeable wear or cracks on the belt face,
check to see if there are nicks on the side of the idler
pulley lock and water pump.

(d)

If there is wear or damage on only one side of the belt,
check the belt guide and the alignment of each pulley.

(e)

If there is noticeable wear on the belt teeth, check timing
cover for damage and check gasket has been installed
correctly and for foreign material on the pulley teeth.

If necessary, replace the timing belt.

2.

INSPECT IDLER PULLEYS

(a)

Visually check the seal portion of the idler pulley for oil
leakage.

If leakage is found, replace the idler pulley.

(b)

Check that the idler pulley turns smoothly.

If necessary, replace the idler pulley.

A05058

P18764

A05059

Protrusion

–

ENGINE MECHANICAL

TIMING BELT

EM–21

LEXUS RX300 (RM785E)

3.

INSPECT TIMING BELT TENSIONER

(a)

Visually check the seal portion of the tensioner for oil leak-
age.

HINT:
If there is only the faintest trace of oil on the seal on the push
rod side, the tensioner is all right.
If leakage is found, replace the tensioner.

(b)

Hold the tensioner with both hands and push the push rod
strongly as shown to check that it doesn’t move.

If the push rod moves, replace the tensioner.
NOTICE:
Never hold the tensioner push rod facing downward.

(c)

Measure the protrusion of the push rod from the housing
end.
Protrusion: 10.0 – 10.8 mm (0.394 – 0.425 in.)

If the protrusion is not as specified, replace the tensioner.

EM0B6–05

A05060

Inward

Sensor

A01802

10 mm
Hexagon

Wrench

Plate Washer

A05055

EM–22

–

ENGINE MECHANICAL

TIMING BELT

LEXUS RX300 (RM785E)

INSTALLATION

1.

INSTALL CRANKSHAFT TIMING PULLEY

(a)

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

(b)

Install the timing pulley, facing the sensor side inward.

NOTICE:
Do not scratch the sensor part of the crankshaft timing
pulley.
(c)

Install the timing belt plate with the bolt.
Torque: 8.0 N·m (80 kgf·cm, 69 in.·lbf)

2.

INSTALL NO. 1 IDLER PULLEY
Adhesive: Part No. 08833–00080, THREE BOND 1344,
LOCTITE 242 or equivalent

(a)

Using a 10 mm hexagon wrench, install the plate washer
and idler pulley with the pivot bolt.
Torque: 34 N·m (350 kgf·cm, 25 ft·lbf)

(b)

Check that the pulley bracket moves smoothly.

3.

INSTALL NO. 2 IDLER PULLEY

(a)

Install the idler pulley with the bolt.
Torque: 43 N·m (440 kgf·cm, 32 ft·lbf)

(b)

Check that the idler pulley moves smoothly.

4.

INSTALL RH CAMSHAFT TIMING PULLEY

(a)

Face the flange side of the timing pulley outward.

(b)

Align the knock pin on the camshaft with the knock pin
groove of the timing pulley, and slide on the timing pulley.

A05061

Fulcrum
Length

SST

SST

RH:

A05056

LH:

SST

A05062

A05063

SST

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ENGINE MECHANICAL

TIMING BELT

EM–23

LEXUS RX300 (RM785E)

(c)

Using SST, install the pulley bolt.
SST

09249–63010, 09960–10010 (09962–01000,
09963–01000)

Torque: 88 N·m (900 kgf·cm, 65 ft·lbf)

HINT:
Use a torque wrench with a fulcrum length of 340 mm (13.39
in.).

5.

INSTALL LH CAMSHAFT TIMING PULLEY

(a)

Face the flange side of the timing pulley inward.

(b)

Align the knock pin on the camshaft with the knock pin
groove of the timing pulley, and slide on the timing pulley.

(c)

Using SST, install the pulley bolt.
SST

09960–10010 (09962–01000, 09963–01000)

Torque: 125 N·m (1,300 kgf·cm, 94 ft·lbf)

6.

SET NO. 1 CYLINDER TO TDC/COMPRESSION

(a)

Crankshaft timing pulley position:
Temporarily install the crankshaft pulley bolt to the crank-
shaft.

(b)

Crankshaft timing pulley position:
Turn the crankshaft, and align the timing marks of the
crankshaft timing pulley and oil pump body.

(c)

Camshaft timing pulley positions:
Using SST, turn the camshaft pulley, align the timing
marks of the timing pulley and No.3 timing belt cover.
SST

09960–10010 (09962–01000, 09963–01000)