Lexus SC300 / Lexus SC400. Manual - part 609

(f) Place 

the 

eight 

injectors 

and 

two 

delivery 

pipes

assembly in position on the intake manifold.

(g) Temporarily install the connector bracket and four

mounting bolts.

(h)  Check that the injectors rotate smoothly.
HINT: If injectors do not rotate smoothly, the probable cause
is incorrect installation of O–rings. Replace the O–rings.
(i) 

Position the injector connector outward.

(j) 

Tighten the four bolts holding the delivery pipes to the
intake manifold.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

2. 

INSTALL FUEL RETURN PIPE
(a)  Temporarily install the return pipe with the bolt, two

gaskets and union bolt.

(b)  Tighten the union bolt holding the return pipe to the

pressure regulator.

Torque: 35 N

⋅

m (360 kgf

⋅

cm, 26 ft

⋅

lbf)

(c) Tighten 

the bolt holding the return pipe to the LH cylinder

head.

3. 

TIGHTEN LOCK NUT ON FUEL PRESSURE REGULATOR

Torque: 29 N

⋅

m (300 kgf

⋅

cm, 22 ft

⋅

lbf)

FI–55

EFI SYSTEM   –   Fuel System (Injectors)

4.  INSTALL ENGINE WIRE TO DELIVERY PIPES, REAR

WATER BY–PASS JOINT AND RH CYLINDER HEAD
(a)  Connect the eight injector connectors.
(b) Connect the two engine wire connectors to the

connector bracket on the LH delivery pipe.

(c)  Install the engine wire to the RH cylinder head with the

two bolts.

(d)  Install the engine wire to the rear water by–pass joint

with the two bolts.

(e)  Install the engine wire to the delivery pipes with the four

bolts.

5. 

INSTALL ENGINE WIRE TO INTAKE MANIFOLD
Install the engine wire with the two bolts.

6.  TEMPORARILY INSTALL EGR PIPE TO RH CYLINDER

HEAD
Temporarily Install the EGR pipe with the bolt.

FI–56

EFI SYSTEM   –   Fuel System (Injectors)

7. CONNECT 

FUEL RETURN HOSE TO FUEL RETURN PIPE

8. 

CONNECT FUEL INLET HOSE TO LH DELIVERY PIPE
Using SST, connect the inlet hose with two new gaskets and
pulsation damper.
SST 09612–24014 (09617–24011)

Torque: 39 N

⋅

m (400 kgf

⋅

cm, 29 ft

⋅

lbf)

33 N

⋅

m (340 kgf

⋅

cm, 24 ft

⋅

lbf) for SST

HINT: Use a torque wrench with a fulcrum length of 30 cm
(11.81 in.).

9. 

INSTALL AIR INTAKE CHAMBER
(See steps 2 to 18 on pages 

FI–35

 to 41)

HINT: After the air intake chamber installed, tighten the bolt
holding to the EGR pipe to the RH cylinder head.

FI–57

EFI SYSTEM   –   Fuel System (Injectors)

Fuel Pressure Pulsation Damper

COMPONENTS FOR REMOVAL AND
INSTALLATION

FI–58

             –   Fuel System (Fuel Pressure Pulsation Damper)

EFI SYSTEM