Lexus SC300 / Lexus SC400. Manual — part 416
EM–16
–
ENGINE MECHANICAL
Engine Tune–Up
13. REINSTALL NO. 3, NO. 1 AND NO. 2 CYLINDER HEAD
COVERS
(a) Remove any oil packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing: Part No. 08826–00080 or equivalent
(c) Install the gaskets to the No. 1 and No. 2 cylinder head
covers.
(d) Install the cylinder head cover with the 12 bolts and four
nuts.
Torque: 5.4 N
⋅
m (55 kgf
⋅
cm, 48 in.
⋅
lbf)
14. RECONNECT HIGH–TENSION CORDS TO SPARK
PLUGS
(a) Connect the high–tension cord to the spark plug.
HINT: The No. 4 high–tension cord must be raised 10
°
from
the perpendicular line.
(b) Connect the two high–tension cord clamps to the No. 3
cylinder head cover.
(c) Install the high–tension cord clamp with the bolt.
15. REINSTALL CYLINDER HEAD REAR COVER AND NO. 3
TIMING BELT COVER
(a) Using a 5 mm hexagon wrench, install the cylinder head
rear cover and No. 3 timing belt cover with the ten bolts.
(b) Install the oil filler cap.
–
ENGINE MECHANICAL
Engine Tune–Up
EM–17
16. REINSTALL THROTTLE BODY WITH INTAKE AIR
CONNECTOR
(a) Place a new gasket so the protrusion face the intake
chamber, and set the throttle body with intake air
connector.
(b) Connect the two water by–pass hoses to the throttle
body.
(c) Install the VSV nut.
(d) Install
the air intake connector with the four bolts and two
nuts.
Torque: 21 N
⋅
m (210 kgf
⋅
cm, 15 ft
⋅
lbf)
(e) Connect the following hoses and connectors:
(1) PCV hose
(2) Three vacuum hoses
(3) VSV (for EGR) connector
(4) Throttle position sensor connector
(5) IAC valve connector
(6) (w/ TRAC)
Sub–throttle position sensor connector
(7) (w/ TRAC)
Sub–throttle actuator connector
(8) (USA spec. only)
EGR gas temperature sensor connector
17. REINSTALL THROTTLE BODY BRACKET
Install the throttle body bracket with the four nuts.
Torque: 21 N
⋅
m (210 kgf
⋅
cm, 15 ft
⋅
lbf)
18. REINSTALL EGR PIPE
(a) Install
a
new gasket and the EGR pipe with the two bolts.
Torque: 21 N
⋅
m (210 kgf
⋅
cm, 15 ft
⋅
lbf)
(b) Tighten the union nut.
Torque: 64 N
⋅
m (650 kgf
⋅
cm, 47 ft
⋅
lbf)
EM–18
–
ENGINE MECHANICAL
Engine Tune–Up
19. REINSTALL AIR CLEANER HOSE
(a) Install the air cleaner hose with two hose clamps.
(b) Connect the following hoses:
(1) PS air hose to No. 4 timing belt cover
(2) PCV hose to No. 2 cylinder head cover
20. RECONNECT CONTROL CABLES TO THROTTLE BODY
Connect the following hoses:
(1) Accelerator cable
(2) (A/T)
Throttle control cable
(3) Cruise control actuator cable
21. RECONNECT CABLE TO NEGATIVE TERMINAL OF
BATTERY
INSPECTION OF IGNITION TIMING
(See page IG–14)
Ignition timing:
10
°
BTDC @ idle
(w/ Terminals TE1 and E1 connected)
INSPECTION OF IDLE SPEED
HINT: Initial conditions (See step 1 on page EM–20)
Idle speed:
M/T 700
±
50 rpm
A/T 650
±
50 rpm (N range)
–
ENGINE MECHANICAL
Engine Tune–Up
EM–19
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