fuel cap NISSAN PULSAR 1987 Workshop Manual
[x] Cancel search | Manufacturer: NISSAN, Model Year: 1987, Model line: PULSAR, Model: NISSAN PULSAR 1987Pages: 238, PDF Size: 28.91 MB
Page 7 of 238
VEHICLE IDENTIFICATION AND GENERAL SPECIFICATIONS
1. VEHICLE IDENTIFICATION
When purchasing spare parts or when
registering
or insuring a vehicle, it may be necessary to quote
various vehicle identification codes. The location of
these codes are as follows: The Engine Number is stamped on the front
face
of the engine block below No. 4 spark plug. The Chassis Number is stamped on the bulkhead
above and to the right of the brake booster. The Vehicle Identification Plate is located on the
bulkhead to the left of the MAP sensor and contains
codings relating to body style, engine capacity,
model,
transaxle type, engine number, paint, trim and build
date. The Compliance Plate contains information on
the vehicle make, model, month and year of manu-
facture, chassis number, seating, capacity and the
Australian Design Rules (ADR) with which the vehi-
cle complies. This plate is affixed to the bulkhead
above and to the left of the brake booster. The Tire Placard, which is located on the inside
of the glove compartment, contains information
on
the tire size, rim size, tire pressure and load ratings.
2. GENERAL VEHICLE SPECIFICATIONS
Length:
Pulsar ................................................... 4 030 mm
Astra hatchback .................................. 4 035 mm
Vector ..................................................4215 mm
Astra sedan.......................................... 4 255 mm
Width:
Nissan.................................................. 1 640 mm
Holden ................................................. 1 655 mm
Height ........................................................ 1 380 mm
Wheelbase .................................................. 2 430 mm
Wheel track:
Front .................................................... 1 435 mm
Rear ..................................................... I 430 mm
View of the engine compartment showing the location
of various vehicle identification information.
Minimum ground clearance:
Nissan.................................................... 128 mm
Holden ................................................... 110 mm
Turning circle kerb to kerb .......................... 10.8 m
Fuel tank capacity:
Nissan.................................................... 47 liters
Holden ................................................... 50 liters
Towing capacity:
Without trailer brakes............................ 400 kg
With trailer brakes ................................. 900 kg
*Fuel consumption:
L/100km L/100km
(City) (Highway)
Manual transaxle 8.5 6.6
Automatic transaxle 9.0 7.2
*The fuel consumption information is based on
tests made according to Australian Standard 2877.
The actual fuel consumption will depend on many
factors including driving habits, vehicle condition
and equipment and the prevailing conditions.
Page 10 of 238
10 General Information
If tools are to be stored for any length of time, it is
good policy to wipe them with an oily cloth.
Bladed screwdrivers should be checked for dam-
age to the tip. If necessary, the tip can be returned to
its original profile by careful grinding. Do not grind
screwdriver tips to a sharp point.
Hammer heads should be secure on their handles
and should be regularly checked for cracking or other
damage.
Chisels and punches should be checked for dam-
age or 'mushrooming' of the head. Any faults should
be rectified by grinding.
Hydraulic jacks should be regularly checked for
fluid leaks. Chassis stands and car ramps should be
checked for damage and cracks. Any equipment that
is suspect should not be used.
STORES
For routine maintenance, stores of automotive
oils, greases and additives should be kept on hand.
The following is a suggested list.
Engine oil.
Brake fluid.
Manual transmission or automatic transmission
oil — automatic transmission oil is also used in
the power steering system.
Rear axle oil.
Cooling system corrosion inhibitor/antifreeze.
Chassis grease.
High melting point grease, for hub bearings etc.
Penetrating oil or spray.
Kerosene or similar cleaning solvent.
Methylated spirits.
Oils and greases are available in handy pack size for
do-it-yourself lube jobs.
2. SAFETY
PERSONAL SAFETY
Safety when working on a motor vehicle is basical-
ly a matter of commonsense. Some safety precautions
to prevent personal in juries are as follows.
Raising a Vehicle
Always jack a vehicle on firm, level ground and at
the specified jacking points . Ensure that the wheels
remaining on the ground are fully chocked.
After raising the vehicle, place chassis stands
underneath and allow the weight of the vehicle to rest
on them. Do not use bricks, blocks of wood or similar
material.
NOTE: Never work under a vehicle which is
only supported by a jack.
Electrical System
Always disconnect the negative battery terminal
when working on any electrical components. Avoid
wearing metal watches, rings and chains which may
short across live terminals.
As battery gases are explosive, keep naked flames
and sparks clear of the work area. When connecting
and disconnecting jumper leads, use extreme caution
to avoid sparking.
Electronic Ignition Systems
Electronic ignition systems produce dangerous
high tension voltages in bo th the primary and second-
ary circuits which can be fatal. Exercise extreme
caution when working on or near any ignition system
components. Do not disconnect high tension leads
while the engine is running.
Work Area
Do not run the engine in a confined space. Ensure
that the work area is adequately ventilated.
Spilt oil or water should be cleaned immediately
to avoid the possibility of slipping.
Fuel System
Always disconnect the negative battery terminal
when working on any fuel components. Do not smoke.
Keep naked flames and sparks clear of the work area.
Do not siphon fuel using the mouth. Use a hand
pump or suitable siphon.
Do not attempt to repair a fuel tank by welding it.
This is an extremely hazardous procedure and should
be entrusted to a specialist.
Cooling System
To avoid scalding, use caution when releasing the
radiator cap on an engine wh ich is at normal operating
temperature. Turn the cap anti-clockwise to the first
stop and allow any pressure in the system to release.
When the pressure is released, remove the cap from
the radiator.
Brakes
As asbestos is used in some brake lining material,
avoid inhaling brake dust. Do not use compressed air
to remove the dust. Gentle brushing with a small
brush or using a vacuum cleaner with a hose attach-
ment are the safest methods of cleaning the brakes.
The above precautions also apply to the clutch plate
lining material.
Page 11 of 238
General Information 11
Lifting Equipment
When using lifting equipment to lift heavy com-
ponents such as the engine and/or transmission, use
metal slings or chain in preference to rope. If rope
must be used, ensure that it is not placed against sharp
edges on the component.
Automotive Lubricants and Solvents
Avoid prolonged skin contact with oils, greases
and solvents as some can cause skin irritations and
dermatitis.
Exercise caution when us ing cleaning solvents as
many are inflammable. Do not smoke. Keep naked
flames and sparks clear of the work area.
Compressed Air
Never point an air hose at another person or allow
compressed air to blow onto your skin. High pressure
air forced against the skin can enter the bloodstream
and prove fatal.
Suspension and Steering Components
Damaged suspension and steering components
should not be welded. Many of these components are
fabricated from toughened metals. If welded they may
lose their strength or become brittle. Damaged com-
ponents should be renewed.
Air Conditioning
Avoid disconnecting air conditioning hoses as
escaping refrigerant can cause frostbite. The refriger-
ant is highly flammable and when burnt, a poisonous
gas is produced.
VEHICLE SAFETY
To prevent damage to the vehicle during servicing
or repair work, note the following precautions.
Brake Fluid
If spilt on the vehicle paintwork, brake fluid
should be immediately washed away with clean water
and allowed to dry naturally, not wiped with a cloth.
Catalytic Converter
The following should be observed to prevent
damage to the catalytic converter:
Do not operate the vehicle on leaded fuel.
Do not push or tow start the vehicle.
Do not allow the engine to idle for prolonged
periods.
Do not switch the ignition off while the vehicle is
in motion and the transmission is in gear.
Do not 'prime' the engine by pouring fuel into the
inlet manifold.
Do not operate the vehicle if the engine is
misfiring.
Avoid running the vehicle out of fuel.
Ensure that the engine oil is formulated to contain
low phosphorus levels.
Electronic Components
The electronic components of the ignition and
fuel injection systems can be damaged by the use of
incorrect testing equipment.
It is essential in all tests where voltage or resis-
tance is to be measured that a digital display multi-
meter with a minimum 10 megohm input impedance
be used.
Some types of tachometers, timing lights and
ignition system analyzers are not compatible with
certain engine electronic systems. It is therefore
recommended that the manufacturer of the test equip-
ment be consulted before using the equipment.
Jump starting, or being jump started by another
vehicle can cause damage to the electronic compon-
ents of the vehicle. Refer to the Roadside Trouble
shooting section for the correct jump starting proce-
dure.
3. GENERAL REPAIR PROCEDURES
SEIZED FASTENERS
Seized bolts, nuts or screws should first have a
liberal amount of penetrating oil applied. The fastener
should be left for a period of time to allow the oil to
penetrate and soften the corrosion which is causing
the binding.
Often, a sharp hammer blow to the head of the
fastener can dislodge the corrosion and permit it to be
loosened.
An impact driver, which can be fitted with a
socket or screwdriver bit, can be used to loosen a
seized fastener.
Another method is to heat the component in
which the fastener is seized. However, extreme cau-
tion should be exercised when heating aluminum
alloy components as the melting point is much lower
than that of steel.
If the above methods fail to free a seized nut,
carefully hacksaw through one side of the nut until it
can be split. Care should be taken that the threads of
the bolt or stud are not damaged.
Should a bolt or stud break below the surface of
the component, it will be necessary to use a screw
extractor to remove the remaining part. Follow the
screw extractor manuf acturers instructions.
Tap and die set and assorted screw extractors.
Page 29 of 238
Engine Tune-up 29
Check the cylinder compressions using a compression gauge.
(a) Inject a small amount of engine oil into the
spark plug hole of the cylinder concerned ensuring
that the oil is evenly distributed within the cylinder by
rotating the engine.
(b) Repeat the compression test on the cylinder
concerned.
A substantial increase of compression pressure
indicates faulty or worn piston rings, pistons or
cylinder.
No increase of compression pressure indicates
burnt, obstructed or sticking valves, or a leaking or
blown cylinder head gasket.
(9) Install the fusible li nk and connect the high
tension lead to the coil.
TO SERVICE THE DISTRIBUTOR
The electronic ignition system requires virtually
no maintenance except for checking of the distributor
cap. rotor and high tension leads as described below.
Refer to the Fuel and Engine Management section
for Specifications and Trouble Shooting.
NOTE: When working on or near electronic
ignition systems, care should be taken as
dangerous high voltages are present in both
the primary and secondary circuits.
The ignition switch should be turned off
before removing or inst alling any electrical
connections otherwise damage to the igni-
tion system as well as severe electrical shock
could result.
TO SERVICE HIGH TENSION LEADS
Check the leads for perishing or cracking and
renew as required. Never a ttempt to repair defective
carbon impregnated core leads.
The lead may be carefully cleaned, using cloth
moistened with kerosene a nd then wiped completely
dry.
If an ohmmeter is available the electrical resis-
tance of the leads may be checked as follows:
View showing the location of the fusible links.
Check the spark plug high tension leads for cracks and
burnt or corroded terminals.
Check the distributor cap for cracks or tracking
between the terminals
.
Page 32 of 238
![NISSAN PULSAR 1987 Workshop Manual
32
ROADSIDE TROUBLE SHOOTING
CAUTION: To prevent severe electrical shock extreme care must be taken w\
hen
working on or near the electronic ignition system as dangerous high tension voltages
are](/img/5/57382/w960_57382-31.png "NISSAN PULSAR 1987 Workshop Manual
32
ROADSIDE TROUBLE SHOOTING
CAUTION: To prevent severe electrical shock extreme care must be taken w\
hen
working on or near the electronic ignition system as dangerous high tension voltages
are")
32
ROADSIDE TROUBLE SHOOTING
CAUTION: To prevent severe electrical shock extreme care must be taken w\
hen
working on or near the electronic ignition system as dangerous high tension voltages
are produced in both the primary and secondary circuits. See the text fo\
r
precautionary notes.
This section deals with the common causes of
engine failure to start, as inevitably there will come a
time when every driver will experience this problem
and will therefore need to call upon his own resources
to rectify the trouble. Roadside breakdowns other
than engine failure can be identified by reference to
the Trouble Shooting section on the particular com-
ponent affected.
1. TROUBLE SHOOTING
Trouble shooting is only a process of elimination
and provided the procedure is carried out correctly
and systematically an accur ate diagnosis of the trouble
can be made in the minimum amount of time.
For an internal combustion engine to run there
are three basic requirements, these are ignition, fuel
and compression. There are other factors of course
but as a rule an engine's failure to start can be
attributed to a fault in one of these three systems.
Reports from field engineers of motoring organi-
sations prove that the bigg est percentage of engine
breakdowns are in the order of ignition or electrical
failure first, followed by fuel, with mechanical or
compression failure the least common.
Should the engine fail to start, first check that
there is adequate fuel in the tank and if so. carry out
the following checking procedures in the order de-
scribed.
TO JUMP START A VEHICLE
NOTE: Jump starting a vehicle can be
dangerous if the procedure described below
is not performed correctly. If any doubt
exists, it is recommended that the services of
a competent mechanic be obtained.
The vehicles covered by this manual are
equipped with complex electronic circuitry
which can be damaged by voltage surges.
These voltage surges can be generated when
jump starting, or being jump started by
another vehicle. If av ailable use jumper
leads equipped with a surge protection de-
vice and follow the lead manufacturers in-
structions carefully, particularly regarding
the connection and disconnection of the
leads.
(1) Ensure that the booster battery is 12 volts
and the negative terminal is earthed.
(2) Ensure that the vehicles are not touching and
that the ignition and all accessories on both vehicles
are switched Off. (3) Ensure that the transmissions on both vehi-
cles are in Park or Neutral and the handbrakes are
firmly applied. (4) Remove the vent caps from the battery and
check the electrolyte level. Replenish with distilled
water as necessary.
View showing the correct jumper lead connections for
jump starting a vehicle. The leads shown are equipped
with a surge protection device.
Page 34 of 238
Roadside Trouble Shooting
ing the wiring from any component, ensure
that the ignition switch is off and the
negative battery terminal is disconnected to
prevent damage to the solid state circuitry.
(4) Open the electrode gap of a serviceable spark
plug to 6 mm. Securely earth the plug using a jumper
lead or by tying the plug to an earthed engine
component.
(5) Disconnect the high tension lead from a
spark plug and connect it to the test spark plug.
(6) Have an assistant operate the starter motor.
(7) Check that a spark, if any, jumps the gap on
the test spark plug. If the spark is satisfactory, proceed to operation
(8).
If there is no spark, proceed as follows:
(a) Check the high tension leads to ensure that
they are dry and that the insulation is not cracked or
perished. Check the ends of the leads for burning. Using an ohmmeter, measure the resistance in
each high tension lead. The resistance should be no
more than 15 000 ohms per lead.
(b) Check the distributor cap to ensure that it is
dry and clean. Examine both the inside and outside of
the cap for cracks or tracki ng, particularly between the
high tension lead segments.
Check that the carbon brush in the centre of the
distributor cap interior fa ce is clean and dry and
ensure that the brush moves freely in and out of its
locating hole.
(c) Check the rotor arm for cracks, deposits and
burning on the metal arm. (d) Ensure that the high tension leads have dry.
clean and secure connections on the distributor cap. (8) If the above checks r esult in a good spark at
the spark plug high tension leads but the engine is still
not operating satisfac torily, remove all the spark plugs
and check the condition and electrode gap as de-
scribed in the Engine Tune-up section under the
appropriate heading.
3. TO CHECK FUEL SYSTEM
Due to the complex nature of the EFI system, it is
recommended that should the following checks prove
satisfactory but the engine fail to start, reference be
made to the Fuel and Engine Management section of
this manual or a Nissan workshop be consulted.
(1) Check that the fuel tank contains a reason-
able amount of fuel. (2) Have an assistant switch the ignition on and
off while squeezing the fuel supply hose with the
fingers. If the fuel pump is operating it should be
possible to feel the fuel pr essure increase for approx-
imately two seconds.
NOTE: When conducting the above test it
should be possible to hear the fuel pump and
ignition relays clicking when the ignition is
switched on and off
If the fuel pump relay fails, power will be
supplied to the fuel pump via the oil pressure
Check the distributor cap for cracks or tracking between the terminals. Squeeze the fuel supply hose while the ignition is
switched On. An increase in pressure should be felt.
Check the spark plug high tension leads for cracks and
burnt or corroded terminals.
Page 48 of 238
48 Engine
TO INSTAL
(1) Check that the camshaft and crankshaft
timing gears have not been moved and that the timing
marks are still aligned. It will be necessary to tempo-
rarily install the crankshaft pulley to check that the
timing marks are still aligned. (2) Install the drive belt to the crankshaft timing
gear around the water pump gear and onto the
camshaft timing gear.
NOTE: If the original drive belt is being
installed, ensure that the arrow marked on
the belt prior to removal is pointing in the
direction of rotation.
(3) Use the adjusting tool to turn the water
pump assembly sufficiently to engage the water pump
pulley with the drive belt. (4) Install the inner cover lower retaining bolt.
(5) Ensure that the drive be lt is correctly meshed
with the teeth of the camshaft, crankshaft and water
pump gears. Install the crankshaft pulley and tighten
the bolts to Specifications. (6) Adjust the drive belt as described under the
following heading.
(7) Install the drive belt outer cover and fasten
the retaining clips. (8) Install and adjust the alternator and if
equipped, the power steeri ng and air conditioning
drive belts as desc ribed in the Engine Tune-up section.
TO ADJUST
(1) Remove the alternator drive belt and if
equipped, the power steering and air conditioning
drive belts. (2) Release the clips securing the camshaft drive
belt outer cover to the inner cover and remove the
outer cover. (3) Turn the engine in the direction of rotation
until the timing marks on the camshaft and the inner
cover are aligned. (4) Loosen the water pump retaining bolts and
using the adjusting tool, rotate the water pump
housing to gain the required belt tension. The belt is
correctly tensioned when it can be grasped between
the thumb and forefinger midway between the cam-
shaft timing gear and the water pump gear and turned
ninety degrees from i t s operating position.
After the belt has been tensioned, tighten the
water pump retaining bolts to the specified torque.
NOTE: Over tensioning of the drive belt will
result in noisy operation and premature
wear of the belt.
(6) Install the outer drive belt cover.
(7) Install and adjust the alternator, and if
equipped, the power steering and air conditioning
drive belts as desc ribed in the Engine Tune-up section. 6. CAMSHAFT. ROCKER ARMS AND TAPPETS
Special Equipment Required:
To Check Camshaft — Dial gauge, Vee blocks and
micrometers
To Install — Drive belt adjusting tool
It is recommended that a new cylinder head
gasket is installed and the cylinder head bolts renewed
when the camshaft housing is removed.
TO REMOVE
(1) Disconnect the negative battery terminal.
Remove the nuts securing the earth wires to the
cylinder head bolts and remove the earth wires.
(2) On 1.6 liter models, remove the air cleaner
wingnuts and withdraw the air cleaner.
(3) Disconnect the engine breather hoses from
the camshaft housing and the camshaft housing top
cover. (4) Remove the camshaft housing top cover
retaining bolts and remove the top cover. Discard the
gasket.
(5) Remove the camshaft dr ive belt as described
under the previous heading. (6) Using an open ended spanner, hold the
camshaft between the inle t and exhaust lobes of
number four cylinder and remove the camshaft timing
gear retaining bolt and the camshaft timing gear.
(7) Remove the distributor, distributor cap and
high tension leads. If necessary refer to the Fuel and
Engine Management section. (8) Check the camshaft end float before remov-
ing the camshaft from the engine. Mount a dial gauge
to the cylinder block with the plunger bearing on the
distributor drive end of the camshaft. (9) Lever the camshaft towards the dial gauge
and zero the gauge. Move the camshaft in the opposite
direction away from the dial gauge and note the
reading obtained. Check this measurement against
Specifications.
Checking the camshaft end float.
Page 69 of 238
Cooling and Heating Systems 69
the cylinder head or cylinder block and renew the
cylinder head gasket.
(2) Crack in the cylinder head or cylinder block:
Repair or renew as necessary.
NOTE; Check the engine for internal leak-
age by withdrawing the dipstick and inspect-
ing for emulsified oil. Run the engine and
check for excessive steam at the exhaust
pipe which would indi cate coolant leakage
into the combustion chamber.
COOLANT LOSS BY OVERFLOW
(1) Overfull system: Drain the excess coolant
from the system.
(2) Faulty radiator cap: Renew the faulty cap.
(3) Blocked radiator core tubes: Clean or renew
the radiator core.
(4) Faulty thermostat: Renew the thermostat.
(5) Coolant foaming due to poor quality anti-
freeze or corrosion inhibitor: Drain the system and
renew the coolant and additive.
Renew the radiator cap if the sealing rubber has
deteriorated.
ENGINE OVERHEATING
(1) Radiator cap defective: Renew the radiator
cap.
(2) Incorrect fuel mixture: Check the fuel system
as described in the Fuel and Engine Management
section. (3) Obstructed air passage through the radiator
core from the front to the rear: Blow the obstruction
from the rear to the front of the radiator core using
compressed air or water pressure. (4) Faulty thermostat: Renew the thermostat.
(5) Incorrect ignition timing: Check and adjust
the ignition timing as described in the Engine Tune-up
section. (6) Incorrect valve timing: Set the valve timing
as described in th e Engine section.
(7) Loss of coolant from the overflow: Check
and rectify as described under the heading Coolant
Loss By Overflow.
(8) Poor circulation: Check and rectify as de-
scribed under the heading Coolant Circulation Faulty.
(9) Low engine oil level: Stop the engine imme-
diately and replenish the oil in the sump. (10) Restricted muffler, catalytic converter or
damaged tailpipe, accompanied by loss of power:
Remove the restrictions or renew the faulty com-
ponents as necessary.
(11) Incorrectly adjusted or dragging brakes:
Check and rectify by adjustment or renewal of
components. (12) Faulty temperature gauge and/or sender unit:
Check and rectify as necessary.
NOTE: Engine overheating is indicated by
an excessive rise in engine temperature
shown by the temperature gauge.
Overheating is usually accompanied by
steam emitting from the coolant overflow
pipe and loss of engine power. A blown
cylinder head gasket may be indicated by
bubbles in the coolant.
COOLANT CIRCULATION FAULTY
(1) Partial blockage of the radiator core tubes:
reverse flush or renew the radiator core.
(2) Sludge deposits in the engine water jacket:
Clean and flush the engine water jacket and add
inhibitor to the coolant. (3) Faulty water pump: Renew the water pump.
(4) Faulty thermostat: Renew the thermostat.
(5) Collapsing lower radiator hose: Renew the
lower radiator hose and check the radiator core tubes. (6) Insufficient coolant in the system: Replenish
the coolant and check for leaks.
NOTE: If rust or sludge deposits are sus-
pected, check the color of the coolant in the
radiator. Rusty or muddy coolant indicates
rust or sludge in the system.
2. HEATER AND AIR CONDITIONER TROUBLE SHOOTING
NO HOT AIR INSIDE VEHICLE
Faulty thermostat: Renew the thermostat.
Faulty heater valve: Check and renew the
Blocked heater hoses: Remove the blockage.
Blocked heater core: Clean or renew the core.
NOTE: Ensure that the engine is reaching
normal operating temperature. If in doubt
check the operation of the thermostat as
described under the Thermostat heading in
this section.
(1)
(2)
valve.
(3)
(4)
Page 70 of 238
70 Cooling and Heating Systems
Installed view of the heater hoses. 1.6 liter models with the air cleaner removed for clarity
.
When the engine is at normal operating
temperature and the heater valve is open,
both of the heater hoses should feel
warm/hot. If the valve is not allowing the
coolant to flow, one hose will be hot while
the other will be cold.
NO COOLED AIR INSIDE VEHICLE
(1) Compressor drive belt slipping or broken:
Renew and/or adjust the drive belt as described in the
Engine Tune-up section.
(2) Insufficient refrigerant: Check the system for
leaks and charge as necessary. Refer to the Air
Conditioning heading in th is section for information
on checking the refrigerant level. (3) Compressor inoperative: Check for power to
the compressor clutch before removing the compres-
sor for repair by a specialist. (4) Heater system allowing warm air to mix with
cooled air: Check the operation of the heater system.
NOTE: The above trouble shooting proce-
dures are basic checks only. If the air
conditioning system is suspect, it is rec-
ommended that the vehicle be taken to an
authorized dealer for testing and repair.
It is normal for water to be seen drain-
ing under the vehicle from the evaporator
after the vehicle has been operated with
the air conditioning on.
3. DESCRIPTION
The cooling system is of the sealed, pressurized
type with fan and water pump assistance. The system
is pressurized in order to raise the boiling point of the
coolant and so increase the efficiency of the engine.
Provision for pressure a nd vacuum relief of the
system is incorporated in the radiator cap.
The radiator overflow hose is connected to a
reserve tank mounted adjacent to the battery. As the
coolant volume expands due to an increase in tem-
perature, the pressure valve in the radiator cap opens
and allows the excess coolant to flow into the reserve
tank. When the engine is stopped and the temperature
of the coolant falls, the vacuum valve in the radiator
cap opens and allows the excess coolant in the reserve
tank to siphon back into the radiator. Thus the
necessity for frequent topping up of the coolant is
eliminated.
The temperature of the cooling system is con-
trolled by a thermostat located in the thermostat
housing attached to the cylinder head.
The thermostat prevents circulation of coolant
through the radiator by directing coolant through the
by-pass circuit, until the engine has reached operating
temperature. This restricted circulation allows the
engine to reach operating temperature quickly, im-
proving drivability and fuel economy.
Removal of the thermostat to cure overheating is
not recommended because th e by-pass circuit will
remain open reducing the amount of water flowing
through the radiator.
An anti-corrosion inhibitor should always be
added to the coolant to protect the cooling and
heating systems from corrosion.
The water pump is mounted to the front of the
engine and is driven by the camshaft drive belt. It is
equipped with a double row ball bearing and a spring
loaded seal assembly. The water pump is a disposable
unit and cannot be repaired.
The fan is driven by an electric motor which is
actuated by the coolant temperature sensor and the
control unit.
On vehicles equipped with air conditioning, an
additional electric fan is m ounted to the radiator. This
fan is controlled by a sw itch connected to the air
conditioning compressor.
The radiator consists of an aluminum core with
plastic side tanks. Minor damage to the core can be
repaired using Nissan repair agent.
The left hand tank of the radiator houses the
transaxle oil cooler on automatic transaxle models.
To drain the cooling system a drain plug is
provided on the lower radiator pipe outlet.
4. RADIATOR
NOTE: To avoid scalding, use caution when
releasing the radiator cap on an engine
which is at the normal operating tempera-
ture. Turn the cap anti-clockwise to the first
stop and allow any pressure in the system to
release. When the pressure is released turn
the cap past the stop and remove it from the
radiator.
Page 83 of 238
Fuel and Engine Management 83
the fuel pump will not operate until the oil
pressure is sufficient to extinguish the oil
pressure warning lamp. Therefore it will be
necessary to operate the starter motor for a
longer period than usual to start the engine.
(3) Faulty EFI component wiring connections:
Check that all component wiring connections are
clean and secure.
(4) Manifold absolute pressure (MAP) sensor
vacuum hose blocked or disconnected: Clear or recon-
nect the vacuum hose. (5) Fault in the ignition system: Check the
primary and secondary ignition circuits.
(6) Engine flooded: Fully depress the throttle
pedal until the engine starts. Check the coolant
temperature sensor. Check th e injector(s) for leakage.
ENGINE STARTS THEN STALLS
(1) Water in the fuel: Dr ain the fuel from the
system and renew the fuel filter.
(2) Air leakage at the inlet manifold: Check all
joints and hoses for air leaks. (3) Faulty EFI wiring connections: Check that
all component wiring connections are clean and
secure.
(4) Ignition timing incorrectly set: Check and
adjust the timing. (5) MAP sensor faulty or supply hose discon-
nected or blocked: Check the vacuum supply hose.
Check the operation of the MAP sensor.
ENGINE MISFIRES
(1) Faulty, dirty or incorrectly adjusted spark
plugs: Renew or clean and adjust the spark plugs.
(2) Condensation in the distributor cap: Dry and
examine the cap for cracks. (3) Faulty high tension leads: Check and renew
the high tension leads.
Testing the fuel system pressure using a pressure
gauge.
(4) Faulty ignition coil: Check and renew the
ignition coil.
(5) Fuel blockage: Check for blockage in the fuel
filter, lines and injector(s). (6) Low fuel pressure: Check the fuel pump and
fuel pressure regulator. (7) Water in the fuel: Dr ain the fuel from the
system and renew the fuel filter. (8) Loose fuel supply wiring connectors: Check
all connectors for tightness. (9) Faulty fuel injector: Check the connections
and test the condition of the fuel injectors.
ENGINE LACKS POWER
(1) Ignition timing incorrectly set: Check and
adjust the timing.
(2) Water in the fuel: Dr ain the fuel from the
system and renew the fuel filter.
(3) Incorrectly adjusted throttle cable: Adjust the
throttle cable.
Check the distributor cap for cracks or tracking be- tween the terminals. The air filter element should be renewed at 40 000 km
intervals. 1.8 liter engine.