Lexus SC300 / Lexus SC400. Manual — part 377

33. California:

INSTALL EGR VALVE

(a) Place a new gasket on the EGR valve apaptor.

NOTICE:

•

Do not touch the adaptor and EGR valve surfaces of the

gasket with your hand.

•

Align the port holes of the gasket and adaptor. Be careful

of the installation direction.

(b) Install the EGR valve with the 2 nuts.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

(c) Connect the following hoses:

(1)

Water bypass hose to IAC valve

(2)

Water bypass hose to water bypass pipe (from rear wa-
ter bypass joint)

(d) Connect the EGR valve connector.

34. Except California:

INSTALL EGR VALVE AND VACUUM MODULATOR

(a) Place a new gasket on the EGR valve adaptor.

NOTICE:

•

Do not touch the adaptor and EGR valve surfaces of the

gasket with your hand.

•

Align the port holes of the gasket and adaptor. Be careful

of the installation direction.

(b) Install the EGR valve and vacuum modulator assembly with

the bolt and 2 nuts.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

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ENGINE MECHANICAL

EG–131

(c) Connect the following hoses:

(1)

Water bypass hose to IAC valve

(2)

Water bypass hose to water bypass pipe

(from rear water bypass joint)

(3)

2 vacuum hoses to VSV for EGR

(d) Install the hose clamp to the PCV hose.

35. INSTALL

VACUUM

PIPE

(a) Install the vacuum pipe, vacuum hose assembly and EGR

water bypass pipe (California) with the 2 bolts.

(b) Connect the following hoses:

(1)

California:

Vacuum hose to throttle body

(2)

Except California:

3 vacuum hoses to throttle body

(3)

Vacuum hose to fuel pressure regulator

(4)

2 vacuum hoses to VSV for fuel pressure control

(5)

Except California:

2 vacuum hoses to EGR vacuum modulator

(6)

2 vacuum hoses (from VSV for EVAP) to vacuum pipe

(7)

Vacuum hose (from VSV for fuel pressure) to air intake
chamber

(8)

Vacuum hose (from charcoal canister) to vacuum pipe

EG–132

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ENGINE MECHANICAL

36. INSTALL TIMING BELT REAR PLATES

Install the rear plate with the 2 bolts. Install the 2 rear plates.

Torque: 7.8 N

⋅

m (80 kgf

⋅

cm, 69 in.

⋅

lbf)

37. INSTALL WATER INLET AND INLET HOUSING
(a) Remove any old packing (FIPG) material and be careful not

to drop any oil on the contact surfaces of the water inlet
housing and water pump.

•

Using a razor blade and gasket scraper, remove all the
old packing (FIPG) material from the gasket surfaces
and sealing groove.

•

Thoroughly clean all components to remove all the
loose material.

•

Using a non–residue solvent, clean both sealing
surfaces.

(b) Apply seal packing to the sealing groove of water inlet

housing as shown in the illustration.

Seal packing:

Part No. 08826–00100 or equivalent

•

Install a nozzle that has been cut to a 2–3 mm (0.08–0
12 in.) opening.

•

Parts must be assembled within 5 minutes of
application. Otherwise the material must be removed
and reapplied.

•

Immediately remove nozzle from the tube and reinstall
cap.

(c) Install a new O–ring to the water inlet housing.
(d) Apply soapy water on the O–ring.

(e) Push the water inlet housing end into the water pump hole.
(f)

Install the water inlet and housing assembly with the 2 bolts.
Alternately tighten the bolts.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

HINT: Use bolts 25 mm (0.98 in.) in length.

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(g) Connect the water bypass hose to the IAC valve.

38. INSTALL RH IGNITION COIL
(a) Install the ignition coil with the 2 bolts.
(b) Connect the ignition coil connector.

39. CONNECT CONTROL CABLES TO THROTTLE BODY

Connect the following cables:
(1)

Accelerator cable

(2)

Transmission throttle control cable

(3)

Cruise control actuator cable

40. INSTALL THROTTLE BODY COVER
(a) Install the throttle body cover and hose clamp with the cap nut

and 2 bolts.

(b) Install the EVAP hose to the hose clamp.

41. INSTALL POWER STEERING (PS) PUMP
(a) Install the PS pump with the nut and 3 bolts. Alternately

tighten the bolts and nut.

Torque:

39 N

⋅

m (400 kgf

⋅

cm, 29 ft

⋅

lbf) for bolt

43 N

⋅

m (440 kgf

⋅

cm, 32 ft

⋅

lbf) for nut

EG–134

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ENGINE MECHANICAL