Lexus SC300 / Lexus SC400. Service manual — part 500

TORQUE SPECIFICATIONS

Part tightened

N

⋅

m

kgf

⋅

cm

ft

⋅

lbf

Fuel line

Union bolt type
Flare nut type

29

300

22

Fuel pipe X Delivery pipe

39

400

29

Fuel pump bracket X Fuel tank

5.4

55

48 in.

⋅

lbf

Fuel pump set plate X Fuel tank

3.9

40

35 in.

⋅

lbf

Fuel tank X Body

25

250

18

Fuel sender gauge X Fuel tank

2.9

30

26 in.

⋅

lbf

Fuel inlet pipe X Fuel tank

2.9

30

26 in.

⋅

lbf

Fuel tank main tube X Fuel tank

29

300

22

Fuel tank return tube X Fuel tank

29

300

22

Fuel tank evaporation vent tube X Fuel tank

29

300

22

Air flow meter X Air cleaner case

10

100

7

Cold start injector X Air intake chamber

7.8

80

69 in.

⋅

lbf

Cold start injector tube X Cold start injector

15

150

11

Air intake chamber X Intake manifold

18

185

13

EGR pipe X Air intake chamber

18

185

13

EGR pipe X RH cylinder head

18

185

13

Cold start injector tube X RH Delivery pipe

15

150

11

Throttle body X Air intake chamber

18

185

13

Fuel return pipe X Fuel pressure regulator

35

360

26

Fuel pressure regulator X RH delivery pipe

29

300

22

Delivery pipe X Intake manifold

18

185

13

Fuel inlet hose X LH delivery pipe

39

400

29

for SST

33

340

24

ISC valve X Air intake chamber

18

185

13

Cold start injector time switch X Front water by–pass joint

34

350

25

Water temperature sensor X Front water by–pass joint

20

200

14

Water inlet housing X Water pump

18

185

13

EGR gas temperature sensor X EGR valve adaptor

20

200

14

EGR valve adaptor X Air intake chamber

18

185

13

EGR valve X EGR valve adaptor

18

185

13

Knock sensor X Cylinder block

44

450

33

Intake manifold X Cylinder head

18

185

13

Main oxygen sensor X Exhaust manifold

44

450

33

Sub–oxygen sensor X Exhaust manifold

44

450

33

FI–142

EFI SYSTEM – Service Specifications

EFI 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.

FI–1

EFI SYSTEM

DESCRIPTION

FI–2

EFI SYSTEM – Description

FI–3

EFI SYSTEM – Description