engine VOLVO XC70 2003 Service Manual

2003 VOLVO XC70
lower with the air conditioning on and the windows closed than with the \
air conditioning off and the
windows open.
l Using the onboard trip computer's fuel consumption modes can help you le\
arn how to drive more
economically.
Other factors that decrease gas mileage are:
l Dirty air cleaner
l Dirty engine oil and clogged oil filter
l Dragging brakes
l Incorrect front end alignment Some of the above mentioned items and othe\
rs are checked at the
standard Maintenance Service intervals.
NOTE: Vehicles equipped with automatic transmissions should use (D)rive as o\
ften as possible and
avoid using "kick-down" to help improve fuel economy. Vehicles equipped \
with manual transmissions
should use fifth gear at highway speeds. At other times, choose the high\
est gear that still allows smooth
acceleration.
Weight distribution affects handling
At the specified curb weight your car has a tendency to understeer, whic\
h means that the steering wheel
has to be turned more than might seem appropriate for the curvature of a\
bend. This ensures good
stability and reduces the risk of rear wheel skid. Remember that these p\
roperties can alter with the
vehicle load. The heavier the load on the rear of the vehicle (e.g., he\
avily loaded (max. 220 lbs, 100 kg)
cargo area or when towing a trailer, the less the tendency to understeer\
.
Handling, roadholding
Vehicle load, tire design and inflation pressure all affect vehicle hand\
ling. Therefore, check that the tires
are inflated to the recommended pressure according to the vehicle load. \
See "Tire pressure" section.
Loads should be distributed so that capacity weight or maximum permissib\
le axle loads are not
exceeded.

pg. 96 Points to remember
Cooling system
The risk for engine overheating is greatest, especially in hot weather, \
when:
l Towing a trailer up steep inclines for prolonged periods at wide open th\
rottle and low engine rpm.
l Stopping the engine suddenly after high speed driving (so-called "after\
-boiling" can occur).
l To avoid overheating, the following rules should be followed: Do not dri\
ve for prolonged periods at
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engine speeds above 4500 rpm if you are towing a trailer in hilly terrai\
n.
Reduce speed when towing a trailer up long, steep inclines. The risk of \
overheating can be reduced by
switching off the air conditioning system for a short time.
Do not let the engine idle unnecessarily for prolonged periods.
Do not mount auxiliary lamps in front of the grill.
When the risk of overheating is imminent, or in the event of overheating\
(the temperature gauge goes
repeatedly into, or stays continually in, the red section), the followi\
ng precautions should be taken:
l Switch off the air conditioning system.
l Pull off the road, away from traffic, stop the car and put the gear sele\
ctor into neutral.
l Switch the heater to full (maximum) position. Increase the engine spee\
d to approx. 2000 rpm (twice
idling speed) until the temperature begins to drop.
WARNING!
Do not remove coolant expansion tank cap. The coolant will be extremely \
hot.
If necessary, see
page 129 and 132 for information on checking and topping-up the coolant
level.
CAUTION: Drive slowly and carefully if going through standing water (i.e. flood\
ed roadways, etc.).
Damage to the engine could result if excess water is drawn in through th\
e air intake system. Never drive
the vehicle in water deeper than 1 foot (300 mm). See the flood warnin\
g on
page 7.
WARNING!
l Driving with the tailgate open: Driving with the tailgate open could mean that poisonous exhaust
gases enter the passenger compartment.
If the tailgate must be kept open for any reason, proceed as follows:
- Close the windows.
- Set the ventilation system control to air flow to floor, windshield an\
d side windows and blower
control to its highest setting.
l Floor mats: An extra mat on the driver's floor can cause the accelerator pedal to \
catch. Check that
the movement of the accelerator pedal is not impeded. Not more than one \
protective floor covering
may be used at one time.
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Electrical system
When replacing the battery or when carrying out work involving the elect\
rical system, the following
should be observed:
l A battery connection to the wrong terminal will damage the electrical sy\
stem. Be sure to connect the
positive battery cable to the positive battery terminal and the negative\
battery cable to the negative
battery terminal.
l If booster batteries are used for starting, they must be properly connec\
ted to minimize the risk of the
electrical system being damaged. For correct connection, see "Jump start\
ing" section.
l Never disconnect the battery circuit (for example, to replace the batte\
ry) while the engine is running,
as this may damage the generator. Always make sure that all the battery \
connections are properly
cleaned and tightened.
l If any electrical welding work is performed on the vehicle, the battery'\
s ground lead (negative cable)
and all the connecting cables of the generator must be disconnected and \
the welder cables placed as near
the welding points as possible.
l The radio must be turned off before the battery is disconnected.
l Switch off the ignition for at least 10 minutes before disconnecting the\
battery.

pg. 97 Roof racks/Load carriers
Load carriers (accessory)
Load carriers are available as Volvo accessories. Observe the following \
points when in use:
l To avoid damaging your car and to achieve maximum safety when driving, w\
e recommend using the
load carriers that Volvo has developed especially for your car.
l Volvo-approved removable roof racks are designed to carry the maximum al\
lowable roof load for this
vehicle: 220 lbs (100 kg). For Non-Volvo roof racks, check the manufac\
turer's weight limits for the rack.
l Never exceed the rack manufacturer's weigh limits and never exceed the m\
aximum rated roof load of
220 lbs (100 kg).
l Avoid single-point loads. Distribute loads evenly.
l Place heavier cargo at the bottom of the load.
l Anchor the cargo correctly with appropriate tie-down equipment.
l Check periodically that the load carriers and load are properly secured.\

l Remember that the car's center of gravity and handling change when you c\
arry a load on the roof.
l The car's wind resistance (and correspondingly, fuel consumption) will\
increase with the size of the
load.
l Drive smoothly. Avoid rapid starts, fast cornering and hard braking.
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2003 VOLVO XC70
Rear towing eyelet
Precautions when the car is in tow
l The steering wheel must be unlocked. Turn the ignition key to position I\
or II.
l The gear selector must be in position N.
l Maximum speed: 50 mph (80 km/h)
l Maximum distance with front wheels on ground: 50 miles (80 km).
l While the car is being towed, try to keep the tow rope taut at all times\
.
l Cars with an automatic transmission should only be towed in forward dire\
ction.
CAUTION:
l Please check with state and local authorities before attempting this typ\
e of towing, as vehicles being
towed are subject to regulations regarding maximum towing speed, length \
and type of towing device,
lighting, etc.
l If the car's battery is dead, do not attempt to start the vehicle by pus\
hing or pulling it as this will
damage the three-way catalytic converter(s). The engine must be jump s\
tarted using an auxiliary battery
(see
page 103).
l If the car is being towed on a flat bed truck, the towing eyelets must n\
ot be used to secure the car on
the flat bed. Consult the tow truck operator.
WARNING!
l Remember that the power brakes and power steering will not function when\
engine is not running.
The braking and steering systems will function but the brake pedal press\
ure required is 3 - 4 times
above normal and greater steering effort must be exerted.
l The towing eyelets must not be used for pulling another vehicle out of a\
ditch or for any similar
purpose involving severe strain.
l Do not use the towing eyelets to pull the car up onto a flat bed tow tru\
ck.


pg. 100 Vehicle towing information

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pg. 101 Towing a trailer
When preparing for trailer towing, observe the following:
Volvo recommends the use of Volvo trailer hitches which are specially de\
signed for the car.
l Maximum trailer weight recommended by Volvo is:
Trailers without brakes: 1100 lbs (500 kg)
Trailers with brakes: 3300 lbs* (1,500 kg),
Observe the legal requirements of the state/province in which the vehicl\
es are registered.
l All Volvo models are equipped with energy-absorbing shock-mounted bumper\
s. Trailer hitch
installation should not interfere with the proper operation of this bump\
er system.
Trailer towing does not normally present any particular problems, but ta\
ke into consideration:
l Increase tire pressure to recommended full. See section "Wheels and tire\
s".
l When your car is new, avoid towing heavy trailers during the first 620 m\
iles (1000 km).
l Recommended hitch tongue load is:
Trailer weights below 2,650 lbs (1,200 kg) - 110 lbs (50 kg)
Trailer weights above 2,650 lbs (1,200 kg) - 165 lbs (75 kg)
l Maximum speed when towing a trailer: 50 mph (80 km/h).
l Engine and transmission are subject to increased loads. Therefore, engin\
e coolant temperature should
be closely watched when driving in hot climates or hilly terrain. Use a \
lower gear and turn off the air
conditioner if the temperature gauge needle enters the red range.
l If the automatic transmission begins to overheat, a message will be disp\
layed in the text window.
l Avoid overload and other abusive operation.
l Hauling a trailer affects handling, durability, and economy.
l It is necessary to balance trailer brakes with the towing vehicle brakes\
to provide a safe stop (check
and observe state/local regulations).
l Do not connect the trailer's brake system directly to the vehicle's brak\
e system.
l More frequent vehicle maintenance is required.
l Remove the ball and drawbar assembly when the hitch is not being used.
l Volvo recommends the use of synthetic engine oil when towing a trailer o\
ver long distances or in
mountainous areas.
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WARNING!
l Bumper-attached trailer hitches must not be used on Volvo's, nor should \
safety chains be attached
to the bumper.
l Trailer hitches attaching to the vehicle rear axle must not be used.
l Never connect a trailer's hydraulic brake system directly to the vehicle\
brake system, nor a trailer's
lighting system directly to the vehicle lighting system. Consult your ne\
arest authorized Volvo retailer
for correct installation.
l When towing a trailer, the trailer's safety wire must be correctly faste\
ned to the hole or hook
provided in the trailer hitch on the car. The safety wire should never b\
e fastened to or wound around
the drawbar ball.
NOTE:
l When parking the car with a trailer on a hill, apply the parking brake before putting the gear selector
in (P)ark. When starting on a hill, put the gear selector in (D)rive\
before releasing the parking brake.
l If you use the manual (Geartronic) shift positions while towing a trai\
ler, make sure the gear you select
does not put too much strain on the engine (using too high a gear).
l The drawbar assembly/trailer hitch may be certified for trailers that ar\
e heavier than the car is
designed to tow. Please adhere to Volvo's recommended trailer weights.
* When driving for prolonged periods at temperatures above 86° F (30\
° C), the maximum recommended
weight is 2000 lbs (900 kg).

pg. 102 Detachable trailer hitch (accessory) - installing/removing


A - ball holder, B - locking bolt, C - cotter pin, D - hitch assembly
Installing the ball holder
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1. If necessary, remove the cotter pin from the locking bolt and slide t\
he locking bolt out of the hitch
assembly.
2. Slide the ball holder into the hitch assembly.
3. Align the hole in the ball holder with the one in the hitch assembly.\

4. Slide the locking bolt through the hitch assembly/ball holder.
5. Insert the cotter pin in the hole at the end of the locking bolt.
Removing the ball holder
1. Remove the cotter pin from the locking bolt and slide the locking bol\
t out of the ball holder/hitch
assembly.
2. Pull the ball holder out of the hitch assembly.
NOTE: A cover for the hitch assembly can be purchased from your Volvo retaile\
r.

pg. 103 Jump starting

Jump starting
Follow these instructions to jump start your car's dead battery or to ju\
mp start another car's dead battery
using your car. Although your car's battery is located under the floor o\
f the cargo area, jumper cables
should be connected in the engine compartment, to the points shown in the illustrations.
If the 12-volt auxiliary battery to be used is in another car, check tha\
t the cars are not touching to prevent
premature completion of a negative circuit. Be sure to follow jump start\
ing instructions provided for the
other vehicle.
To jump start your car:
l Switch off the ignition.
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l First connect the auxiliary battery positive (+) terminal (1) to the\
positive (+) terminal in your car's
engine compartment (2), located under a small black plastic cover atta\
ched to the fuse box cover,
marked with a "+" sign. Remove the cover on the main fuse box if necessa\
ry to access this terminal. See
page 113.
l Then connect the auxiliary battery negative (-) terminal (3) to the \
ground point in your car's engine
compartment (4).
Start the engine in the assisting car, then start the engine in the car \
with the dead battery.
l After the engine has started, first remove the negative (-) terminal j\
umper cable. Then remove the
positive (+) terminal jumper cable.
CAUTION:
Improper hookup of jumper cables or use of other than 12-volt batteries \
could result in damage to
equipment and/or the battery.
WARNING!
l Do not connect the jumper cable to any part of the fuel system or to any\
moving parts. Avoid
touching hot manifolds.
l Never expose the battery to open flame or electric spark.
l Do not smoke near the battery.
l Batteries generate hydrogen gas which is flammable and explosive.
l Battery fluid contains sulfuric acid. Do not allow battery fluid to cont\
act eyes, skin, fabrics or
painted surfaces. If contact occurs, flush the affected area immediately\
with water. Obtain medical
help immediately if eyes are affected.
Failure to follow the instructions for jump starting can lead to persona\
l injury.
NOTE: Refer to
pages 138-139 for information on properly maintaining the battery.
PROPOSITION 65 WARNING!
Battery posts, terminals, and related accessories contain lead and lead \
compounds, chemicals known
to the state of California to cause cancer and reproductive harm. Wash h\
ands after handling.


pg. 104 Winter driving
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Cold weather precautions
If you wish to check your car before the approach of cold weather, the f\
ollowing advice is worth noting:
l Make sure that the engine coolant contains 50 percent antifreeze. Any ot\
her mixture will reduce
freeze protection. This gives protection against freezing down to -31°\
F (-35°C). See section "Coolant".
The use of "recycled" antifreeze is not approved by Volvo. Different typ\
es of antifreeze must not
be mixed.
l Volvo recommends using only genuine Volvo antifreeze in your car's radia\
tor. Your local Volvo
retailer stocks plenty of Volvo engine coolant to protect your car durin\
g cold weather.
l Try to keep the fuel tank well filled - this prevents the formation of condensation in the tank. \
In
addition, in extremely cold weather conditions it is worthwhile to add f\
uel line de-icer before refueling.
l The viscosity of the engine oil is important. Oil with low viscosity (thinner oil) improves cold-
weather starting as well as decreasing fuel consumption while the engine\
is warming up. For winter use,
5W-30 oil, particularly the synthetic type *, is recommended. Be sure to\
use good quality oil but do not
use this cold-weather oil for hard driving or in warm weather. See section "Engine oil" for more
information.
l The load placed on the battery is greater during the winter since the windshield wipers, lighting, etc\
.
are used more often. Moreover, the capacity of the battery decreases as \
the temperature drops. In very
cold weather, a poorly charged battery can freeze and be damaged. It is \
therefore advisable to check the
state of charge more frequently and spray an anti-rust oil on the batter\
y posts.
l Volvo recommends the use of snow tires on all four wheels for winter dri\
ving - see section "Wheels
and tires".
l To prevent the washer fluid reservoir from freezing, add washer solvents\
containing antifreeze (see
page 130 for the location of the washer fluid reservoir). This is important sin\
ce dirt is often splashed on
the windshield during winter driving, requiring the frequent use of the \
washers and wipers. The Volvo
Washer Solvent should be diluted as follows:
Down to 14° F (-10° C): 1 part washer solvent and 4 parts water \
Down to 5° F (-15° C): 1 part washer solvent and 3 parts water
Down to 0° F (-18° C): 1 part washer solvent and 2 parts water
Down to -18° F (-28° C): 1 part washer solvent and 1 part water \
l Use Volvo Teflon Lock Spray in the locks.
NOTE: Avoid the use of de-icing sprays as they can cause damage to the locks.
W Winter/Wet driving mode - enhanced vehicle traction
l Mode W will only function if the gear selector is in the (D)rive posit\
ion.
l Press the button at the base of the gear selector to engage/disengage th\
is driving mode (see
illustration).
l An LED in the button will light up to indicate that W is engaged and this will also be displayed in the
instrument panel (see
page 27).
l This mode may be selected for starting/moving off on slippery roads.
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pg. 105 Long distance trips
Before a long distance trip
It is always worthwhile to have your car checked at a Volvo retailer bef\
ore driving long distances. Your
retailer will also be able to supply you with bulbs, fuses, spark plugs \
and wiper blades for your use in the
event that problems occur.
As a minimum, the following items should be checked before any long trip\
:
l Check that engine runs smoothly and that fuel consumption is normal.
l Check for fuel, oil, and fluid leakage.
l Check condition of accessory drive belts.
l Check transmission oil level*.
l Check state of the battery's charge.
l Examine tires carefully (the spare tire as well), and replace those th\
at are worn. Check tire pressures.
l The brakes, front wheel alignment, and steering gear should be checked b\
y your Volvo retailer only.
l Check all lights, including high beams.
l Reflective warning triangles are legal requirement in some countries.
l Have a word with your Volvo retailer if you intend to drive in countries\
where it may be difficult to
obtain the correct fuel.
l Consider your destination. If you will be driving through an area where \
snow or ice are likely to
occur, consider snow tires.
* To prevent injury from contact with hot surfaces, do not inspect your \
car's transmission fluid yourself.
Have your car's transmission fluid level inspected by a qualified Volvo \
service technician.

pg. 106 Three-way catalytic converters


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