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Infiniti M35/M45 Y50. Manual - part 788

PRECAUTIONS

GI-5

●

To prevent serious burns:
Avoid contact with hot metal parts.
Do not remove the radiator cap when the engine is hot.

●

Dispose of or recycle drained oil or the solvent used for cleaning
parts in an appropriate manner.

●

Do not attempt to top off the fuel tank after the fuel pump nozzle
shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel
spray and possibly a fire.

●

Clean all disassembled parts in the designated liquid or solvent
prior to inspection or assembly.

●

Replace oil seals, gaskets, packings, O-rings, locking washers, cotter pins, self-locking nuts, etc. with new
ones.

●

Replace inner and outer races of tapered roller bearings and needle bearings as a set.

●

Arrange the disassembled parts in accordance with their assembled locations and sequence.

●

Do not touch the terminals of electrical components which use microcomputers (such as ECM).
Static electricity may damage internal electronic components.

●

After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection.

●

Use only the fluids and lubricants specified in this manual.

●

Use approved bonding agent, sealants or their equivalents when required.

●

Use hand tools, power tools (disassembly only) and recom-
mended special tools where specified for safe and efficient ser-
vice repairs.

●

When repairing the fuel, oil, water, vacuum or exhaust systems,
check all affected lines for leaks.

●

Before servicing the vehicle:
Protect fenders, upholstery and carpeting with appropriate cov-
ers.
Take caution that keys, buckles or buttons do not scratch paint.

WARNING:

To prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness
connectors which are related to the engine control system and TCM (transmission control module)
system. The connectors should be disconnected only when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC and AT sections.

Precautions for Three Way Catalyst

NAS0009G

If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To
prevent this, follow the instructions.

●

Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.

●

When checking for ignition spark or measuring engine compression, make tests quickly and only when
necessary.

SGI233

PBIC0190E

SGI234

GI-6

PRECAUTIONS

●

Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to
the catalyst.

Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three
way catalyst.

Precautions for Fuel (Unleaded Premium Gasoline Recommended) (VQ35DE
Engine Models)

NAS0009H

INFINITY recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-
Knock Index) number (Research octane number 96).

If unleaded premium gasoline is not available, you may use unleaded regular gasoline with an octane rating of
at least 87 AKI number (Research octane number 91), but you may notice a decrease in performance.

CAUTION:

Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85%fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel
(i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.

Precautions for Fuel (Unleaded Premium Gasoline Required) (VK45DE Engine
Models)

NAS0009I

Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number (Research
octane number 96).

If unleaded premium gasoline is not available, unleaded regular gasoline with an octane rating of at least 87
AKI number (Research octane number 91) can be used, but only under the following precautions:

●

Have the fuel tank filled only partially with unleaded regular gasoline, and fill up with unleaded premium
gasoline as soon as possible.

●

Avoid full throttle driving and abrupt acceleration.

However, for maximum vehicle performance, the use of unleaded premium gasoline is recommended.

CAUTION:

Precautions for Multiport Fuel Injection System or Engine Control System

NAS0009J

●

Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.

●

Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.

●

Be careful not to jar components such as ECM and mass air
flow sensor.

SGI787

PRECAUTIONS

GI-7

Precautions for Hoses

NAS0009K

HOSE REMOVAL AND INSTALLATION

●

To prevent damage to rubber hose, do not pry off rubber hose
with tapered tool or screwdriver.

●

To reinstall the rubber hose securely, make sure that hose inser-
tion length and orientation is correct. (If tube is equipped with
hose stopper, insert rubber hose into tube until it butts up
against hose stopper.)

HOSE CLAMPING

●

If old rubber hose is re-used, install hose clamp in its original
position (at the indentation where the old clamp was). If there is
a trace of tube bulging left on the old rubber hose, align rubber
hose at that position.

●

Discard old clamps; replace with new ones.

●

After installing plate clamps, apply force to them in the direction
of the arrow, tightening rubber hose equally all around.

Precautions for Engine Oils

NAS0009L

Prolonged and repeated contact with used engine oil may cause skin cancer. Try to avoid direct skin contact
with used oil.
If skin contact is made, wash thoroughly with soap or hand cleaner as soon as possible.

HEALTH PROTECTION PRECAUTIONS

●

Avoid prolonged and repeated contact with oils, particularly used engine oils.

SMA019D

SMA020D

SMA021D

SMA022D

GI-8

PRECAUTIONS

●

Wear protective clothing, including impervious gloves where practicable.

●

Do not put oily rags in pockets.

●

Avoid contaminating clothes, particularly underpants, with oil.

●

Heavily soiled clothing and oil-impregnated footwear should not be worn. Overalls must be cleaned regu-
larly.

●

First aid treatment should be obtained immediately for open cuts and wounds.

●

Use barrier creams, applying them before each work period, to help the removal of oil from the skin.

●

Wash with soap and water to ensure all oil is removed (skin cleansers and nail brushes will help). Prepa-
rations containing lanolin replace the natural skin oils which have been removed.

●

Do not use gasoline, kerosene, diesel fuel, gas oil, thinners or solvents for cleaning skin.

●

If skin disorders develop, obtain medical advice without delay.

●

Where practical, degrease components prior to handling.

●

Where there is a risk of eye contact, eye protection should be worn, for example, chemical goggles or face
shields; in addition an eye wash facility should be provided.

Precautions for the Environment

NAS000BG

In servicing the vehicle, it may be necessary to use, dispose of or recycle hazardous, flammable, or poisonous
materials, such as gasoline, refrigerant gas, solvents, oil, oil filter, air bag modules, seat belt pretensioners,
etc. Disposal, recycling, and transportation of any hazardous materials should be performed in compliance
with applicable federal, state and local laws and regulations.

Precautions for Air Conditioning

NAS0009M

Use an approved refrigerant recovery unit any time the air conditioning system must be discharged. Refer to
ATC/MTC section “HFC-134a (R-134a) Service Procedure”, “REFRIGERANT LINES” for specific instructions.

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