Lexus ES300 (1997 year). Service manual — part 468

P12814

Recessed Head Bolt

Front

8 mm Hexagon Wrench

P12595

Z09320

(1)

(2)

(3)

P12590

–

ENGINE MECHANICAL

CYLINDER HEAD

EM–53

790

1997 LEXUS ES300 (RM511U)

3.

INSTALL RECESSED HEAD CYLINDER HEAD BOLTS

(a)

Apply a light coat of engine oil on the threads and under
the heads of the cylinder head bolts.

(b)

Using an 8 mm hexagon wrench, install the cylinder head
bolt on each cylinder head, then repeat for the other side,
as shown.
Torque: 18.5 N·m (185 kgf·cm, 13 ft·lbf)

4.

ASSEMBLE EXHAUST CAMSHAFTS

(a)

Mount the hexagonal wrench head portion of the cam-
shaft in a vise.

NOTICE:
Be careful not to damage the camshaft.

(b)

Install these parts:
(1)

Camshaft gear spring

(2)

Camshaft sub–gear

HINT:
Attach the pins on the gears to the gear spring ends.

(3)

Wave washer

(c)

Using snap ring pliers, install the snap ring.

P12974

SST

Main Gear

Sub Gear

P12963

90

°

Exhaust

P12804

Exhaust

Front

P12390

Exhaust

Seal
Packing

EM–54

–

ENGINE MECHANICAL

CYLINDER HEAD

791

1997 LEXUS ES300 (RM511U)

(d)

Using SST, align the holes of the camshaft main gear and
sub–gear by turning camshaft sub–gear counterclock-
wise, and temporarily install a service bolt.
SST

09960–10010 (09962–01000, 09963–00500)

(e)

Align the gear teeth of the main gear and sub–gear, and
tighten the service bolt.

5.

INSTALL CAMSHAFTS OF RH CYLINDER HEAD

NOTICE:
Since the thrust clearance of the camshaft is small, the
camshaft must be held level while it is being installed. If the
camshaft is not level, the portion of the cylinder head re-
ceiving the shaft thrust may crack or be damaged, causing
the camshaft to seize or break. To avoid this, the following
steps should be carried out.

(a)

Install the exhaust camshaft.
(1)

Apply new engine oil to the thrust portion and jour-
nal of the camshaft.

(2)

Place the exhaust camshaft at 90

°

angle of timing

mark (2 dot marks) on the cylinder head.

(3)

Apply MP grease to a new oil seal lip.

(4)

Install the oil seal to the camshaft.

(5)

Remove any old packing (FIPG) material.

(6)

Apply seal packing to the No.1 bearing cap as
shown.

Seal packing: Part No. 08826–00080 or equivalent

P12890

Exhaust

P12887

Exhaust

8

7

6

5

4

3

2

1

9

10

P12875

Intake

Align

P12798

Intake

P25422

Intake

8

7

6

5

4

3

2

1

9

10

–

ENGINE MECHANICAL

CYLINDER HEAD

EM–55

792

1997 LEXUS ES300 (RM511U)

(7)

Install the 5 bearing caps in their proper locations.

(8)

Apply a light coat of engine oil on the threads and
under the heads of the bearing cap bolts.

(9)

Install and uniformly tighten the 10 bearing cap
bolts, in several passes, in the sequence shown.

Torque: 16 N·m (160 kgf·cm, 12 ft·lbf)

(b)

Install the intake camshaft.
(1)

Apply new engine oil to the thrust portion and jour-
nal of the camshaft.

(2)

Align the timing marks (2 dot marks) of the camshaft
drive and driven gears.

(3)

Place the intake camshaft on the cylinder head.

(4)

Install the 5 bearing caps in their proper locations.

(5)

Apply a light coat of engine oil on the threads and
under the heads of the bearing cap bolts.

(6)

Install and uniformly tighten the 10 bearing cap
bolts, in several passes, in the sequence shown.

Torque: 16 N·m (160 kgf·cm, 12 ft·lbf)

P12870

Intake

Service Bolt

P12884

Exhaust

90

°

P12805

Exhaust

Front

P12390

Exhaust

Seal
Packing

P12962

Exhaust

EM–56

–

ENGINE MECHANICAL

CYLINDER HEAD

793

1997 LEXUS ES300 (RM511U)

(7)

Remove the service bolt.

6.

INSTALL CAMSHAFTS OF LH CYLINDER HEAD

NOTICE:
Since the thrust clearance of the camshaft is small, the
camshaft must be held level while it is being installed. If the
camshaft is not level, the portion of the cylinder head re-
ceiving the shaft thrust may crack or be damaged, causing
the camshaft to seize or break. To avoid this, the following
steps should be carried out.

(a)

Install the exhaust camshaft.
(1)

Apply new engine oil to the thrust portion and jour-
nal of the camshaft.

(2)

Place the exhaust camshaft at 90

°

angle of timing

mark (1 dot mark) on the cylinder head.

(3)

Apply MP grease to a new oil seal lip.

(4)

Install the oil seal to the camshaft.

(5)

Remove any old packing (FIPG) material.

(6)

Apply seal packing to the No.1 bearing cap as
shown.

Seal packing: Part No. 08826–00080 or equivalent

(7)

Install the 5 bearing caps in their proper locations.