Lexus RX300 (MCU15). Manual — part 443

A05244

SST

EM–56

–

ENGINE MECHANICAL

CYLINDER HEAD

LEXUS RX300 (RM785E)

(d)

Using SST and a hammer, tap in a new gasket until its sur-
face is flush with the upper edge of the cylinder head cov-
er.
SST

09608–03071

(e)

Apply a light coat of MP grease to the gasket lip.

(f)

Return the ventilation plate tab to its original position.

EM0KL–02

P11511

10 – 15 mm (0.39 – 0.59 in.)

Adhesive

P12572

Protrusion

P12869

Flush

A05418

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ENGINE MECHANICAL

CYLINDER HEAD

EM–57

LEXUS RX300 (RM785E)

REASSEMBLY

HINT:

S

Thoroughly clean all parts to be assembled.

S

Before installing the parts, apply new engine oil to all slid-
ing and rotating surfaces.

S

Replace all gaskets and oil seals with new ones.

1.

INSTALL SPARK PLUG TUBES

HINT:
When using a new cylinder head, spark plug tubes must be
installed.
(a)

Apply adhesive to the end of the spark plug tube.
Adhesive: Part No. 08833–00070, THREE BOND 1324
or equivalent

(b)

Using a press, press in a new spark plug tube until there
is 42.4 – 43.4 mm (1.669 – 1.709 in.) protruding from the
camshaft bearing cap installation surface of the cylinder
head.

NOTICE:
Avoid pressing a new spark plug tube in too far by measur-
ing the amount of the protrusion while pressing.

2.

INSTALL PCV PIPES

HINT:
When using a new cylinder head, PCV pipe must be installed.
Using a wooden block and hammer, tap in a new PCV pipe until
its top side is flush with the cylinder head edge.
NOTICE:
Be careful not to damage the cylinder head edge.

3.

INSTALL OIL CONTROL VALVE FILTER

(a)

Assemble the valve filter and plug.

(b)

Install the plug with new gasket.
Torque: 45 N·m (460 kgf·cm, 33 ft·lbf)

A05276

P12719

SST

S05923

Intake

Exhaust

Mark

”NOK”

Light Brown Surface

Gray Surface

P12668

(e)

(d)

(c)

(b)

A05224

SST

EM–58

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ENGINE MECHANICAL

CYLINDER HEAD

LEXUS RX300 (RM785E)

4.

INSTALL CYLINDER HEAD REAR COVER

Install the rear cover and gasket with the 6 bolts.

Torque: 10 N·m (100 kgf·cm, 7.3 ft·lbf)

5.

INSTALL VALVES

(a)

Using SST, push in a new oil seal.
SST

09201–41020

HINT:
The intake valve oil seal is light brown and the exhaust valve oil
seal is gray.
NOTICE:
Pay much attention when assembling the oil seal for intake
and exhaust. Assembling the wrong one may cause a fail-
ure.

(b)

Install the valve.

(c)

Install the spring seat.

(d)

Install the valve spring.

(e)

Install the spring retainer.

(f)

Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST

09202–70020 (09202–00010)

A05246

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ENGINE MECHANICAL

CYLINDER HEAD

EM–59

LEXUS RX300 (RM785E)

(g)

Using a plastic–faced hammer and the valve stem (not in
use) tip wound with vinyl tape, lightly tap the valve stem
tip to assure proper fit.

NOTICE:
Be careful not do damage the valve stem tip.
6.

INSTALL VALVE LIFTERS AND SHIMS

(a)

Install the valve lifter and shim.

(b)

Check that the valve lifter rotates smoothly by hand.