Lexus GS300/400 (2000 year). Manual — part 136

A11122

A02713

A02836

S03013

A02647

EM–36

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

1390

22.

REMOVE INTAKE MANIFOLD ASSEMBLY

(a)

Disconnect the starter wire from the manifold stay.

(b)

Remove the 2 bolts and manifold stay.

(c)

Remove the 7 bolts, 2 nuts, intake manifold and delivery
pipe assembly and gasket.

23.

REMOVE NO.1 AND NO.2 CYLINDER HEAD COVERS

(a)

Remove the 12 bolts and 4 nuts.

(b)

Remove the cylinder head covers and gaskets.

24.

DISCONNECT TIMING BELT FROM CAMSHAFT TIM-
ING PULLEYS (See page

EM–16

)

NOTICE:

Support the timing belt, so that the measuring of the
crankshaft timing pulley and timing belt does not
shift.

Be careful not to drop anything inside the timing belt
cover.

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

25.

REMOVE CAMSHAFT TIMING PULLEYS

(a)

Remove the exhaust camshaft timing pulley.

Hold the hexagon portion of the camshaft with a wrench, and
remove the pulley bolt and camshaft pulley.
(b)

Remove the VVT–i (intake camshaft timing) pulley.
(See page

EM–16

)

26.

REMOVE NO.4 TIMING BELT COVER

Remove the 4 bolts and timing belt cover.

A02695

5 mm Hexagon
Wrench

A02696

No.1

No.3

A02930

1

10

2

11

12

5

6

7

8

3

4

9

1

2

11

12

5

6

7

8

3

4

9

10

S02650

10 mm
Bi–Hexagon
Wrench

3

14

12

13

10

11

7

6

2

1

5

9

8

4

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

EM–37

1391

27.

REMOVE CAMSHAFTS

(a)

Using a 5 mm hexagon wrench, the 2 No.3 camshaft
bearing cap bolts.

(b)

Uniformly loosen and remove the 4 camshaft bearing cap
bolts.

(c)

Using a screwdriver, pry out the Nos.1, 3 camshaft bear-
ing caps and oil seals.

NOTICE:
Be careful not to damage the cap. Tape the screwdriver tip.

(d)

Uniformly loosen and remove the 12 camshaft bearing
cap bolts, in several passes, in the sequence shown.

(e)

Remove the 6 No.2 camshaft bearing caps and camshaft.
Remove the intake and exhaust camshafts.

28.

REMOVE CYLINDER HEAD ASSEMBLY

(a)

Using a 10 mm bi–hexagon wrench, uniformly loosen and
remove the 14 cylinder head bolts, in several passes, in
the sequence shown.

NOTICE:
Cylinder head warpage or cranking could result from re-
moving in incorrect order.
(b)

Remove the 14 plate washers.

S03016

Lift

Pry

EM–38

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

1392

(c)

Lift the cylinder head from the dowels on the cylinder
block.

(d)

Disconnect the heater hose from the heater union.

(e)

Place the head on wooden blocks on a bench.

If the cylinder head is difficult to lift off, pry with a screwdriver be-
tween the cylinder head and block projection.
NOTICE:
Be careful not to damage the contact surfaces of the cylin-
der head and cylinder block.

EM0DB–01

A02703

A02715

SST

–

ENGINE MECHANICAL (2JZ–GE)

CYLINDER HEAD

EM–39

1393

DISASSEMBLY

1.

REMOVE WATER OUTLET WITH WATER BYPASS
HOSE

Remove the 2 nuts, bolt, water outlet and gasket.
2.

REMOVE ENGINE HANGER

3.

REMOVE CAMSHAFT POSITION SENSOR

4.

REMOVE ECT SENSOR

5.

REMOVE VALVE LIFTERS AND SHIMS

HINT:
Store the valve lifters and shims in correct order.

6.

REMOVE VALVES

(a)

Using SST, compress the valve spring and remove the 2
keepers.
SST

09202–70020 (09202–00010)

(b)

Remove the spring retainer, valve spring, valve and
spring seat.

HINT:
Store the valves, valve springs, spring seats and spring retain-
ers in correct order.
(c)

Using needle–nose pliers, remove the oil seal.