Lexus SC300 / Lexus SC400. Manual - part 529

5. INSTALL 

DISTRIBUTOR 

CAPS

Install the distributor cap with the three bolts. Install the two
distributor caps.

Torque: 3.8 N

⋅

m (39 kgf

⋅

cm, 34 in.

⋅

lbf)

6.  CONNECT HIGH–TENSION CORDS TO DISTRIBUTOR

CAPS
Connect the ten high–tension cords.
NOTICE: Connect the high–tension cord by pressing on
the correct place as shown in the illustration.
If not done this way, the high–tension cord will interfere with
the camshaft timing pulley.

7. 

INSTALL RH NO.2 TIMING BELT COVER
(a)  Install the four gaskets to the timing belt cover.
(b)  Install the connector grommet to the timing belt cover.
(c)  Install the timing belt cover with the five bolts.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

HINT (12 mm head bolt): Use bolts 106 mm (4.17 in.) in
length.
(d)  Install the wire clamp to the timing belt cover.
(e) Install 

the 

cam position sensor wire to the wire clamp on

the timing belt cover.

(f) 

Install the cam position sensor connector to the ignition
coil bracket.

8. 

INSTALL LH NO.2 TIMING BELT COVER
(a)  Install the two gaskets to the timing belt cover.
(b)  Run the cam position sensor wire through the timing belt

cover hole.

(c)  Install the timing belt cover and connector bracket with

the three bolts.

(d)  Connect the cam position sensor connector.
(e)  Install the cam position sensor connector to the

connector bracket.

(f) Install 

the 

cam position sensor wire to the wire clamp on

the timing belt cover.

(g)  Install the connector grommet to the timing belt cover.

–

 IGNITION SYSTEM

Distributor

IG–27

9. 

INSTALL DRIVE BELT IDLER PULLEY
Install the idler pulley and cover plate with the pulley bolt.

Torque: 37 N

⋅

m (380 kgf

⋅

cm, 27 ft

⋅

lbf)

10.  INSTALL NO.3 TIMING BELT COVERS

(See steps 5 to 9 and 11 on pages 

IG–17

 to 19)

11.  CONNECT RADIATOR HOSE TO WATER INLET
12.  CONNECT CABLE TO NEGATIVE TERMINAL OF

BATTERY

13.  FILL ENGINE WITH COOLANT (See page 

CO–6

)

14.  WARM UP ENGINE

Allow the engine to warm up to normal operating tempera-
ture.

15. CONNECT 

TACHOMETER

Connect the tester probe of a tachometer to terminal IG

 of

the check (”DIAGNOSIS”) connector.
HINT: Set the tachometer to the 4–cylinder range.
NOTICE:

•

Never allow the tachometer tester probe to touch ground

as it could result in damage to the igniter and/or ignition

coil.

•

As some tachometers are not compatible with this

ignition system, we recommend that you confirm the

compatibility of your unit before use.

16.  CHECK IGNITION TIMING

(a)  Using SST, connect terminals TE1 and E1 of the check

(”DIAGNOSIS”) connector.

SST 09843–18020

(b) Connect the tester probe of a timing light to the

high–tension cord for No.6 cylinder.

IG–28

–

 IGNITION SYSTEM

Distributor

(c)  Check the ignition timing.

Ignition timing: 8–12

°

 BTDC @ idle

(Transmission in neutral range)

If the ignition timing is not as specified, check that following
conditions are normal:

•

Throttle valve fully closed

•

Continuity between terminals IDL1 and E2 of the
throttle position sensor (See page 

FI–73

)

•

Valve timing (See page 

EM–51

)

(e)  Remove the SST from the check connector.
SST 09843–18020

17.  DISCONNECT TACHOMETER AND TIMING LIGHT FROM

ENGINE

18.  INSTALL UPPER HIGH–TENSION CORD COVER

(See step 10 on pages 

IG–18

 and 19)

–

 IGNITION SYSTEM

Distributor

IG–29

SERVICE SPECIFICATIONS

SERVICE DATA

Oil pressure

at idle speed

29 kPa (0.3 kgf/cm, 4.3 psi) or more

at 3,000 rpm

294–539 kPa

(3.0–5.5 kgf/cm, 43–78 psi)

Oil pump

Tip clearance

STD

0.310–0.490 mm

0.0122–0.0193 in.

Limit

0.53 mm

0.0209 in.

Body clearance

STD

0.100–0.175 mm

0.0039–0.0069 in.

Limit

0.20 mm

0.0079 in.

Rotor clearance

STD

0.030–0.090 mm

0.0012–0.0035 in.

Limit

0.12 mm

0.0047 in.

TORQUE SPECIFICATIONS

Part tightened

N m

kgf cm

ft

⋅

lbf

A/C compressor X Cylinder block

Through bolt

26

265

19

Bolt and nut

52

530

38

Oil pressure switch X Cylinder
block

14

150

11

Oil drain plug X No.2 oil pan

45

450

33

Oil pump body cover X Oil pump
body

10

105

8

Plug X Oil pump body

49

500

36

Oil pump X Cylinder block

21

210

15

No.1 oil pan X Cylinder block

12 mm head bolt

21

210

15

14 mm head bolt

39

400

29

Oil pan baffle plate X No.1 oil pan

8.8

 90

78 

in.

⋅

lbf

Oil strainer X No.1 oil pan

8.8

 90

78 

in.

⋅

lbf

No.2 oil pan X No.1 oil pan

8.8

 90

78 

in.

⋅

lbf

Oil level sensor X No.1 oil pan

5.4

 55

48 

in.

⋅

lbf

–

LUBRICATION SYSTEM

Service Specifications

LU–19