Lexus LS400 (2000 year). Manual — part 80

EM0A5–02

P21361

Front

Protrusion

Tighten

New
Gasket

Hollow

Touch

B

A

Hole

EM–120

–

ENGINE MECHANICAL

EXHAUST SYSTEM

1302

INSTALLATION

CONNECT CENTER EXHAUST PIPE TO FRONT EXHAUST
PIPE AND TAILPIPES
HINT:

Install a new gasket to the exhaust pipe in the correct
direction.

Fit together the clamp protrusion and pipe hollow, and
tighten the clamp bolt until A and B of the clamp are just
touching.

EM09M–02

A01892

A02247

A01865

A01866

–

ENGINE MECHANICAL

TIMING BELT

EM–15

1197

REMOVAL

1.

REMOVE OIL PAN PROTECTOR

2.

REMOVE ENGINE UNDER COVER

3.

DRAIN ENGINE COOLANT

4.

REMOVE BATTERY CLAMP COVER

5.

REMOVE AIR CLEANER INLET

6.

REMOVE V–BANK COVER

Remove the bolt, 2 cap nuts and V–bank cover.
7.

REMOVE AIR CLEANER AND INTAKE AIR CONNEC-
TOR ASSEMBLY

8.

REMOVE DRIVE BELT, FAN, FLUID COUPLING AND
FAN PULLEY

(a)

Loosen the 4 nuts holding the fluid coupling to the fan
bracket.

(b)

Remove the generator drive belt. (See page

CH–8

)

(c)

Remove the 4 nuts, the fan, fluid coupling assembly and
fan pulley.

9.

REMOVE RADIATOR ASSEMBLY (See page

CO–21

)

10.

REMOVE DRIVE BELT IDLER PULLEY

Remove the pulley bolt, cover plate and idler pulley.
11.

REMOVE RH NO.3 TIMING BELT COVER

(a)

Disconnect the PS air hose from the clamp of the timing
belt cover.

(b)

Disconnect the wire clamp.

(c)

Disconnect the radiator reservoir outlet hose from the wa-
ter inlet housing.

(d)

Remove the bolt and nut, disconnect the outlet pipe from
the timing belt cover and LH cylinder head.

(e)

Remove the 3 bolts, timing belt cover and gasket.

A01867

A01870

P20740

SST

A01871

Turn

EM–16

–

ENGINE MECHANICAL

TIMING BELT

1198

12.

REMOVE LH NO.3 TIMING BELT COVER

(a)

Disconnect the engine wire from the 2 wire clamps.

(b)

Remove the 4 bolts and nut.

(c)

Disconnect the camshaft position sensor wire from the
wire clamp on the timing belt cover.

(d)

Disconnect the sensor connector from the connector
bracket.

(e)

Disconnect the sensor connector.

(f)

Remove the wire grommet from the timing belt cover.

(g)

Remove the timing belt cover and gasket.

13.

REMOVE NO.2 TIMING BELT COVER

Remove the 2 bolts and No.2 timing belt cover.
14.

DISCONNECT A/C COMPRESSOR FROM ENGINE
(See page

EM–77

)

15.

REMOVE FAN BRACKET

Remove the 2 bolts, 2 nuts and fan bracket.

16.

IF RE–USING TIMING BELT, CHECK INSTALLATION
MARKS ON TIMING BELT

Check that there are 3 installation marks on the timing belt by
turning the crankshaft pulley as shown in the illustration.
HINT:
If the installation marks have disappeared, place a new installa-
tion mark on the timing belt before removing each part.

17.

LOOSEN CRANKSHAFT PULLEY BOLT

Using SST, loosen the pulley bolt.

SST

09213–70010 (90105–08076),
09330–00021

18.

SET NO.1 CYLINDER TO APPROX. 50

°

ATDC/COM-

PRESSION

(a)

Turn the crankshaft pulley and align its groove with timing
mark ”0” of the No.1 timing belt cover.

A01872

A01874

Crankshaft
Pulley Bolt

Timing
Mark

No.2 Idler
Pulley Bolt

Approx. 50

°

Turn

A01875

A01876

String

–

ENGINE MECHANICAL

TIMING BELT

EM–17

1199

(b)

Check that the timing marks of the camshaft timing pul-
leys and timing belt rear plates aligned.

If not, turn the crankshaft 1 revolution (360

°

).

(c)

Turn the crankshaft pulley approx. 50

°

clockwise, and put

the timing mark of the crankshaft pulley in line with the
centers of the crankshaft pulley bolt and the idler pulley
bolt.

NOTICE:
If the timing belt is disengaged, having the crankshaft
pulley at the wrong angle can cause the piston head and
valve head to come into contact with each other when you
remove the camshaft timing pulley (step 19), causing dam-
age. So always set the crankshaft pulley at the correct
angle.
(d)

Remove the crankshaft pulley bolt.

NOTICE:
Do not turn the crankshaft pulley.

19.

REMOVE TIMING BELT TENSIONER

HINT:

When re–using timing belt:
If the installation marks have disappeared, before remove
the timing belt, place 2 new installation marks on the tim-
ing belt to match the timing marks of the camshaft timing
pulleys.

When replacing timing belt tensioner only:
To avoid meshing of the timing pulley and timing belt, se-
cure one of them with string. And place matchmarks on
the timing belt and RH camshaft timing pulley.