VOLVO V90 1998 Owners Manual

1998 Volvo S90
extreme operating conditions such as trailer
towing in sustained ambient temperatures over
104° F (40° C). However, SAE 10W-30 synthetic
oil would be a better alternative in such
conditions.
SAE 15W-40 should not be used under normal
operating conditions.
American Petroleum Institute
(API) labels. These labels certify
the oil conforms to the applicable
standards and specifications of
the API.
Servicing pg. 110
Torque exhaust and
intake manifold nuts


A loose manifold could alter air/
fuel ratio and cause an increase
in emissions and/or poor
driveability.

Air cleaner

Replace the air cleaner cartridge
with a new one every 30,000
miles (48,000 km). The
cartridge should be replaced
more often when driving under
dirty and dusty conditions, The
filter cannot be cleaned and,
therefore, should always be
replaced with a new one.

Vacuum fittings, hoses
and connections


Unstable idle, misfiring, or poor
emission control is often caused
by leaking vacuum hoses or
connections. Check hoses and
connections on distributor
vacuum unit, connections on
heater control servo systems and
hydraulic brake servo.
Fuel system cap, tank
and lines, and
connections


The effectiveness of the fuel
system to contain hydrocarbons
is dependent largely on a
leakfree system. Check for
proper sealing of gasoline filler
cap which contains "O" ring-
type seals. Check all
evaporative hoses in vehicle for
tightness. Check fuel lines under
vehicle and repair if necessary.

Fuel (line) filter

The fuel line filter is located
next to the fuel pump. This filter
should be replaced every
100,000 miles (160,000 km).
The filter is replaced as one
complete unit.
Replace more frequently if
contaminated fuel is introduced
into the tank (or if there is
reason to suspect that this has
occurred).

Timing belt

WARNING!
The distributor ignition
system operates at very high
voltages. Special safety
precautions must be followed
to prevent injury.
Always turn the ignition off
when:
l Replacing distributor
ignition components e.g.
plugs, coil, etc.
l Do not touch any part of
the distributor ignition system
while the engine is running.
This may result in unintended
movements and body injury.


Replacing spark plugs

The spark plugs should be
changed every 30,000 miles
(48,000 km). However, city
driving or fast highway driving
may necessitate changing after
15,000 miles (24,000 km) of
driving. When installing new
plugs, be sure to fit the right type
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1998 Volvo S90

Idle air control system

Your Volvo is equipped with an
electronically-controlled idle air
control system that requires no
checking or adjustment.
Volvo recommends that the
timing belt be replaced every
70,000 miles (112,000 km).

PCV system

The orifice nipple in the intake
manifold and the filter at the
end of the PCV hose in the
aircleaner should be inspected
every 60,000 miles (96,000 km).
Check/replace rubber hoses at
the same time.
and use correct torque, see
Specifications. When changing
the plugs, check that the
suppressor connectors are in
good condition. Cracked or
damaged connectors should be
replaced.
When changing the spark plugs,
clean the terminals and the
rubber seals.
Battery maintenance pg. 111
Battery maintenance

Driving habits and conditions, climate, the
number of starts, etc. all affect the service life and
function of the battery. In order for your battery to
perform satisfactorily, keep the following in mind:
l Check the fluid level in the battery every 6
months or every 10,000 * miles (16,000 km).
The fluid level in each battery cell should be
checked - use a screw driver to open the caps and
a flashlight to inspect the level.
*More frequently in warm climates.
l If necessary, add distilled water to
approximately 0.4 in. (10 mm) above the plates in
the cell or to the level indicator. See the
illustrations above.
l Check that the battery cables are correctly
connected and properly tightened.
l Never disconnect the battery when the engine is
running, for example when changing the battery.
l The battery should be disconnected when a
boost charger is used.
l Switch off the radio before disconnecting the
battery. If your radio has an antitheft code and the
battery is disconnected, the radio code has to be
reentered in order for the radio to function.
Fuel/emissions systems pg. 112
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1998 Volvo S90
SFI is all-electronic and microprocessor-
controlled. It can continually compensate for
variations in engine load, speed and temperature
to give the best economy and power. An
important feature of the system is a mass air flow
sensor that measures the mass of the inducted air
instead of the volume. In this way the system can
make instantaneous adjustments for changes in air
temperature or density, thus always assuring the
best economy with the lowest possible exhaust
emissions.

Heated oxygen sensor

This is an emission control system designed to
reduce emissions and improve fuel economy. The
heated oxygen sensors monitor the composition of
the exhaust gases leaving the engine. The exhaust
gas analysis is fed into an electronic module. This
adjusts the air-fuel ratio to provide optimum
conditions for combustion and efficient reduction
of the three major pollutants (hydrocarbons,
carbon monoxide and oxides of nitrogen) by a
three-way catalytic converter.
Air pump system

During cold starts, an electric pump is activated
which directs air to the exhaust channels. This
initiates a secondary combustion of exhaust gases
which helps minimize hydrocarbon and carbon
monoxide levels and reduces warm-up time for
the three-way catalytic converter. The pump
begins to function when the engine is started. It
remains in operation until the three-way catalytic
converter has reached normal operating
temperature. A sound may be audible from the air
pump during this warm-up period. This is normal.
When idling, the air pump performs a self-
diagnosis. A soft whining noise can be heard,
which is also normal.
Emissions systems pg. 113


Evaporative control system (EVAP)

The engine is equipped with a fuel evaporation
system which prevents the emission of fuel vapor


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1998 Volvo S90
into the atmosphere. The system consists of a
system of hoses in the fuel tank, a "Roll-Over"
valve on the cross-member forward of the fuel
tank, a carbon filter canister in the engine
compartment which binds the fuel vapors, and an
electric valve which, when necessary, empties the
canister in the engine compartment of evaporated
fuel and routes it into the engine. Crankcase ventilation

The engine is provided with positive crankcase
ventilation which prevents crankcase gases from
being released into the atmosphere. Instead, the
crankcase gases are admitted to the intake
manifold and cylinders.




Contents | Top of Page
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1998 Volvo S90
Chapter 8 - (cont.)
Engine compartment
pg. 114
Engine compartment S90/V90

1 Expansion tank, coolant
2 Oil filler cap, engine
3 Engine oil dipstick
4 Brake fluid reservoir
5 Battery
6 Data plate
7 Radiator
8 Power steering fluid reservoir
9 Air cleaner
10 Washer fluid reservoir
11 Main fuse box
12 Relay/fuse box

WARNING!
The cooling fan may start or continue to
operate (for up to 6 minutes) after the
engine has been switched off.
Lubrication pg. 115

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1998 Volvo S90
No. Lubricating hint / Lubricant
1 Hood lock and latch / Oil
2 Hood hinges / Oil
3 Door stop and hinges / Oil
4 Sun roof wind deflector / Oil
Sun roof mechanism / Grease
5 Door lock catch plate / Oil
6 Trunk lid lock / Low temperature
keyhole and hinges / grease

No. Lubricating hint / Lubricant
7 Window regulator/ Oil, grease
locking device low temperature
(on inside of door) / grease
8 Front seat slide rail
and latch / Oil
9 Door lock keyhole / Low temperature grease or Volvo Teflon lock spray \

To avoid rattles and unnecessary wear, the body should be lubricated at \
regular service intervals. This should be done by
an authorized Volvo retailer.
Brake fluid, Power steering fluid pg. 116

Brake fluid reservoir
Power steering fluid

The fluid level should lie between the MIN and MAX on the
side of the dipstick. The space between the marks
corresponds to 0.2 US qts/liters.

Fluid type: ATF
Replace: no fluid change required.Brake fluid

The fluid level should be between the MIN and MAX
marks.

Fluid type: DOT 4+
Replace*: every second year or 30,000 miles (48,000
km). The brake fluid should be replaced once a year or
every 15,000 miles (25,000 km) when driving under
extremely severe conditions (mountain driving, hot
climate, high humidity etc.)

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1998 Volvo S90
Check, without removing the cap, that the level is above
the "MIN" mark of the fluid reservoir.
Always entrust brake fluid changing to an authorized
Volvo retailer.
Drive belt pg. 117
Belt check

Check the belt regularly to make sure it is in good
condition and is clean. A worn or dirty belt can cause poor
cooling and low generator output as well as impair the
operation of the power steering and the air conditioning
unit.

WARNING! The engine must not be running when
this check is performed. NOTE: The belt is equipped with a self-questioning
mechanism and requires no adjustment between changes.
Cooling system pg. 118



Changing coolant

Normally, the coolant does not
need to be changed. If the system
must be drained, use the following
procedure:
Remove the expansion tank cap.
Open the drain cock on the right
side of the engine block and
disconnect the lower radiator
hose.
Fill coolant through the expansion
tank. The heater controls should
be fully open when draining and
WARNING: If the engine is
warm and you are going to top
up coolant, unscrew the cap
slowly in order to allow any
excess pressure to escape.


NOTE: Do not top up with water
only. Water by itself reduces the
rust-protective and anti-freeze
qualities of the coolant and has a
lower boiling point. It can also
cause damage to the cooling system
if it should freeze.
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1998 Volvo S90

Check coolant level

The cooling system must be filled with
coolant and not leak to operate at maximum
efficiency. Check the coolant level regularly.
The level should be between the "Max" and
"Min" marks on the expansion tank. The
check should be made with particular
thoroughness when the engine is new or
when the cooling system has been drained.
Do not remove the filler cap other than for
topping-up with coolant. Frequent removal
may prevent coolant circulations between the
engine tank during engine warm-up and
cooling.
filling.
Add coolant until the level is up to
the MAX mark or slightly above.
Start the engine and run until hot.
Check the cooling system
connections for tightness. Also re-
check the coolant level.
Capacity: See "Specifications"
coolant: Volvo Genuine Coolant/
Antifreeze only

CAUTION
The cooling system must
always be kept filled to correct
level.
If it is not kept filled, there can
be high local temperatures in
the engine which could result
in damage.
Different types of anti-freeze/
coolant may not be mixed.
Adjusting washer nozzles, Washer fluid reservoir pg. 119


Adjusting washer nozzles

The washer jets should spray the windshield as shown. Use
the edge of a small screwdriver to adjust the nozzles, if
necessary. Please use caution to avoid damaging the
paintwork.


Washer fluid reservoir

The washer fluid reservoir is located in the engine
compartments and holds approx. 0.5 US gal. (2 liters) -
sedans and 0.8 US gal (3.2 liters) - wagons. During cold
weather, the reservoir should be filled with windshield
washer solvent containing anti-freeze.


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1998 Volvo S90


Contents | Top of Page
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1998 Volvo S90
Chapter 9 - Specifications
pg. 121
Specifications
This chapter contains facts and figures pertaining to the technical spec\
ifications of
your car.
Oil/Fluids specifications pg. 122

Engine specifications pg. 123
Cooling system pg. 124
Fuel system pg. 124
Distributor ignition system pg. 124
Transmission pg. 125
Suspension pg. 125
Electrical system/bulbs pg. 126
Capacities pg. 127
Service manuals, Road assistance pg. 128
Dimensions and weights pg. 129
Oil/Fluids Specifications
pg. 122
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