Lexus SC300 / Lexus SC400. Manual - part 562

3. 

INSTALL NO. 2 IDLER PULLEY
(a)  Install the idler pulley with the pulley bolt. Torque the

pulley bolt.

Torque: 34 N

⋅

m (350 kgf

⋅

cm, 25 ft

⋅

lbf)

(b)  Check that the idler pulley moves smoothly.

4. 

TEMPORARILY INSTALL TIMING BELT
NOTICE: The engine should be cold.
(a)  Using the crankshaft pulley bolt, turn the crankshaft and

align the timing marks of the crankshaft timing pulley
and oil pump body.

(b) Remove 

any oil or water on the crankshaft timing pulley,

No. 1 idler pulley and No. 2 idler pulley, and keep them
clean.

(c)  Align the installation mark on the timing belt with the dot

mark of the crankshaft timing pulley.

(d) Install 

the timing belt on the crankshaft timing pulley, No.

1 idler pulley and No. 2 idler pulley.

5.  INSTALL TIMING BELT GUIDE (NO. 1 CRANK ANGLE

SENSOR PLATE)
Install the belt guide, facing the cup side forward.

6. 

INSTALL TIMING BELT COVER SPACER
(a)  Install the gasket to the spacer.
(b)  Install the spacer.

–

ENGINE MECHANICAL

Timing Belt

EM–47

7. 

INSTALL NO.1 TIMING BELT COVER
(a)  Install the gasket to the timing belt cover.
(b)  Install the timing belt cover with the four bolts.

8. 

INSTALL HYDRAULIC PUMP
(a)  Install the hydraulic pump and solenoid valve connector

clamp and engine speed sensor wire clamp with the two
bolts and two nuts.

Torque:

12 mm heads 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

Others 30 N

⋅

m (310 kgf

⋅

cm, 22 ft

⋅

lbf)

HINT: Each bolt length is indicated in the illustration.
Bolt length:

A 106 mm (4.17 in.) for 12 mm head
B 114 mm (4.49 in.) for 14 mm head

(b)  Connect the solenoid valve connector.

9. 

INSTALL CRANKSHAFT PULLEY
(a)  Align the pulley set key on the crankshaft with the key

groove of the pulley.

(b)  Using SST and a hammer, tap in the pulley.
SST 09223–46011

(c)  Using SST, install and torque the pulley bolt.
SST 09213–70010 and 09330–00021

Torque: 245 N

⋅

m (2,500 kgf

⋅

cm, 181 ft

⋅

lbf)

10.  INSTALL RH CAMSHAFT TIMING PULLEY

(a)  Align the knock pin on the camshaft with the knock pin

groove of the timing pulley.

(b)  Slide the timing pulley, facing the ”R” mark forward.
(c)  Using SST, install and torque the pulley bolt.
SST 09278–54012

Torque: 108 N

⋅

m (1,100 kgf

⋅

cm, 80 ft

⋅

lbf)

EM–48

–

ENGINE MECHANICAL

Timing Belt

11.  INSTALL LH CAMSHAFT TIMING PULLEY

(a)  Align the knock pin on the camshaft with the knock pin

groove of the timing pulley.

(b)  Slide the timing pulley, facing the ”L” mark forward.
(c)  Using SST, install and torque the pulley bolt.
SST 09278–54012

Torque: 108 N

⋅

m (1,100 kgf

⋅

cm, 80 ft

⋅

lbf)

12.  SET NO.1 CYLINDER TO TDC/COMPRESSION

(a) (Crankshaft 

Pulley 

Position)

Turn the crankshaft pulley, and align its groove with the
”O” timing mark of the No.1 timing belt cover.

(b)  (Camshaft Timing Pulley Position)

Using SST, turn the camshaft timing pulley, and align the
timing marks of the camshaft timing pulley and timing
belt rear plate.

SST 09278–54012

13. INSTALL TIMING BELT TO LH CAMSHAFT TIMING

PULLEY
(a) Align 

the installation mark on the timing belt with the end

of the hydraulic pump.

(b)  Remove any oil or water on the LH camshaft timing

pulley, and keep it clean.

(c)  Using SST, slightly turn the LH camshaft timing pulley

clockwise. Align the installation mark on the timing belt
with the timing mark of the camshaft timing pulley, and
hang the timing belt on the LH camshaft timing pulley.

SST 09278–54012

–

ENGINE MECHANICAL

Timing Belt

EM–49

(d)  Using SST, align the timing marks of the LH camshaft

pulley and timing belt rear plate.

SST 09278–54012
(e)  Check that the timing belt has tension between the

crankshaft timing pulley and LH camshaft timing pulley.

14. INSTALL TIMING BELT TO RH CAMSHAFT TIMING

PULLEY
(a)  Remove any oil or water on the RH camshaft timing and

water pump pulley, and keep them clean.

(b)  Using SST, slightly turn the RH camshaft timing pulley

clockwise. Align the installation mark on the timing belt
with the timing mark of the camshaft timing pulley, and
hang the timing belt on the RH camshaft timing pulley.

SST 09278–54012

(c)  Using SST, align the timing marks of the RH camshaft

pulley and timing belt rear plate.

SST 09278–54012
(d)  Check that the timing belt has tension between the RH

camshaft timing pulley and LH camshaft pulley.

15.  SET TIMING BELT TENSIONER

(a)  Using a press, slowly press in the push rod using

981–9,807 N (100–1,000  kgf, 220–2,205 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
setting position of the push rod.

(c)  Release the press.

(d)  Install the dust boot to the tensioner.

EM–50

–

ENGINE MECHANICAL

Timing Belt