Lexus SC300 / Lexus SC400. Service manual — part 644

SERVICE SPECIFICATIONS

SERVICE DATA

Oil pressure

at idling

29 kPa (0.3 kgf/cm

2

, 4.3 psi) or more

at 3,000 rpm

294–588 kPa

(3.0–6.0 kgf/cm

2

, 43–85 psi)

Oil pump

Tip clearance

STD

0.110–0.240 mm

0.0043–0.0094 in.

Limit

0.35 mm

0.0138 in.

Side clearance

STD

0.030–0.090 mm

0.0012–0.0035 in.

Limit

0.15 mm

0.0059 in.

Body clearance

STD

0.100–0.175 mm

0.0039–0.0069 in.

Limit

0.30 mm

0.0118 in.

TORQUE SPECIFICATIONS

Part tightened

N

⋅

m

kgf

⋅

cm

ft

⋅

lbf

Oil oumo body cover X Oil pump body

10

105

8

Oil pump X Cylinder block

12 mm head

16

160

12

14 mm head

30

310

22

Engine speed sensor X Oil pump

6.4

65

56 in.

⋅

lbf

Oil filter bracket X Oil pump

18

185

13

Oil strainer X Oil pump

7.8

80

69 in.

⋅

lbf

Oil strainer X Cylinder block

7.8

80

69 in.

⋅

lbf

No.2 oil pan X Cylinder block

10 mm head

7.8

80

69 in.

⋅

lbf

12 mm head

18

185

13

Oil pan baffle plate X No.1 oil pan

7.8

80

69 in.

⋅

lbf

No.2 oil pan X No.1 oil pan

7.8

80

69 in.

⋅

lbf

No.2 oil pan X Cylinder block

7.8

80

69 in.

⋅

lbf

Oil level sensor X No.1 oil pan

5.4

55

48 in.

⋅

lbf

LU–20

–

LUBRICATION SYSTEM

Service Specifications

STARTING SYSTEM

STARTING SYSTEM

NOTE: The specification descriptions ”USA Spec.” and
”Exc. USA Spec.” used in this section indicate the following
specifications.
USA Spec.: USA (50 States) Specifications
Exc. USA Spec.: USA (except California) and Canadian
Specifications.

ST–1

DESCRIPTION

The starter is a reduction type starter with a small, high–speed motor used to drive the pinion gear. It is

installed in the center of the V–bank of the cylinder block.

ST–2

–

STARTING SYSTEM

Description

SYSTEM CIRCUIT

OPERATION

When the ignition switch is turned to START, current flows from terminal 50 to the coil of the solenoid and

the plunger is pulled by the magnetic force of the coil. When the plunger is pulled to the left as shown above,
the contact plate of the plunger allows current from the battery to flow directly from terminal 30 to the motor, and
the starter rotates.

When the engine is running and the ignition switch is returned to ON, the magnetic force of the coil disappears

and the contact plate of the plunger is returned to its original position by the return spring. Battery voltage no
longer flows from terminal 30, so the motor stops.

–

STARTING SYSTEM

System Circuit, Operation

ST–3