Infiniti G37 Coupe. Manual - part 615

 

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Infiniti G37 Coupe. Manual - part 615

 

 

EXHAUST MANIFOLD

EM-35

< ON-VEHICLE REPAIR >

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• Install exhaust manifold and tighten mounting bolts in numerical

order as shown in the figure.

NOTE:
Tighten nuts the No. 1 and 2 in two steps. The numerical order No.
7 and 8 shows the second step.

AIR FUEL RATIO SENSOR

CAUTION:

• Before installing a new air fuel ratio sensor, clean exhaust system threads using heated oxygen sen-

sor thread cleaner tool (Commercial Service Tool: J-43897-18 or J-43897-12) and apply anti-seize
lubricant.

• Never apply excessive torque to air fuel ratio sensor. Doing so may cause damage to air fuel ratio

sensor, resulting in the “MIL” illuminating.

Inspection

INFOID:0000000001547590

INSPECTION AFTER REMOVAL

Surface Distortion

• Check the surface distortion of the exhaust manifold mating sur-

face with a straightedge (A) and a feeler gauge (B).

• If it exceeds the limit, replace exhaust manifold.

Tightening torque

Refer to 

EM-33, "Exploded View"

.

A

:  Bank  1

B

:  Bank  2

: Engine front

JPBIA0017ZZ

Limit

: Refer to 

EM-139, "Exhaust Manifold"

.

JPBIA0018ZZ

EM-36

< ON-VEHICLE REPAIR >

FUEL INJECTOR AND FUEL TUBE

FUEL INJECTOR AND FUEL TUBE

Exploded View

INFOID:0000000001547591

CAUTION:

Never remove or disassemble parts unless instructed as shown in the figure.

Removal and Installation

INFOID:0000000001547592

REMOVAL

WARNING:

• Put a “CAUTION: FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventilated area and furnish workshop with a CO

2

fire extinguisher.

• Never smoke while servicing fuel system. Keep open flames and sparks away from the work area.
• Never drain engine coolant when the engine is hot to avoid the danger of being scalded.

1.

Release fuel pressure. Refer to 

EC-601, "Inspection"

.

2.

Disconnect battery cable from the negative terminal. Refer to 

PG-96, "Exploded View"

.

3.

Remove engine cover with power tool. Refer to 

EM-24, "Exploded View"

.

4.

Remove air cleaner case and air duct (RH and LH). Refer to 

EM-26, "Exploded View"

.

5.

Remove intake manifold collector. Refer to 

EM-28, "Exploded View"

.

1.

Quick connector cap

2.

Fuel feed hose (with damper)

3.

O-ring

4.

Fuel sub tube

5.

O-ring

6.

Clip

7.

Fuel damper

8.

O-ring

9.

Fuel tube

10. O-ring (black)

11. Fuel injector

12. Clip

13. O-ring (green)

A.

Refer to 

EM-36

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1169GB

FUEL INJECTOR AND FUEL TUBE

EM-37

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6.

Remove fuel feed hose (with damper) (1) from fuel sub-tube (2)
and remove harness bracket (3).

NOTE:
There is no fuel return route.

CAUTION:

• While hoses are disconnected, plug them to prevent fuel

from draining.

• Never separate damper and hose.

7.

When separating fuel feed hose (with damper) and centralized under-floor piping connection, disconnect
quick connector as follows:

a.

Remove quick connector cap (2) from quick connector connec-
tion on right member side.

b.

Disconnect fuel feed hose (with damper) (1) from bracket hose
clamp.

c.

Disconnect quick connector from centralized under-floor piping as follows:

CAUTION:

Disconnect quick connector by using quick connector release [SST: — (J-45488)], not by picking
out retainer tabs.

i.

With the sleeve side of quick connector release facing quick connector, install quick connector release
onto centralized under-floor piping.

ii.

Insert quick connector release (A) into quick connector (2) until
sleeve (B) contacts and goes no further. Hold quick connector
release on that position.

CAUTION:

Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.

iii.

Draw and pull out quick connector straight from centralized under-floor piping.

CAUTION:

• Pull quick connector holding “D” position as shown in the figure.
• Never pull with lateral force applied. O-ring inside quick connector may be damaged.
• Prepare container and cloth beforehand because fuel will leak out.
• Avoid fire and sparks.
• Keep parts away from heat source. Especially, be careful when welding is performed around

them.

• Never expose parts to battery electrolyte or other acids.
• Never bend or twist connection between quick connector and fuel feed hose (with damper) dur-

ing installation/removal.

: Engine front

JPBIA0032ZZ

JPBIA0254ZZ

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: Centralized under-floor piping

C

: Insert and retain

D

: Holding position

E

: Pull quick connector

JPBIA0033ZZ

EM-38

< ON-VEHICLE REPAIR >

FUEL INJECTOR AND FUEL TUBE

• To keep the connecting portion clean and to avoid dam-

age and foreign materials, cover them completely with
plastic bags, etc. (A) or a similar item.

8.

Remove fuel sub tube mounting bolt.

9.

Disconnect harness connector from fuel injector.

10. Loosen mounting bolts in reverse order as shown in the figure,

and remove fuel tube and fuel injector assembly.

CAUTION:

Never tilt it, or remaining fuel in pipes may flow out from
pipes.

11. Remove fuel injector (2) from fuel tube (4) as follows:

a.

Open and remove clip (1).

b.

Remove fuel injector from fuel tube by pulling straight.

CAUTION:

• Be careful with remaining fuel that may go out from fuel

tube.

• Be careful not to damage injector nozzles during removal.
• Never bump or drop fuel injector.
• Never disassemble fuel injector.

12. Remove fuel sub-tube and fuel damper, if necessary.

INSTALLATION

JPBIA0035ZZ

: Engine front

JPBIA1170ZZ

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: O-ring

A

: Installed condition

B

: Clip mounting groove

JPBIA1359ZZ

 

 

 

 

 

 

 

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