Volvo 2004 S60 R Manual page 78

105,000 miles (168,000 km) and again at 150,000 miles (240,000 km).
Spark plugs
The spark plugs should be replaced every 60,000 miles (96,000 km) under normal driving conditions. City driving or
fast highway driving may necessitate replacement sooner.
Under normal driving conditions, spark plugs require no maintenance between replacement intervals. When installing
new plugs, be sure to use the right type and to tighten them correctly. When changing the plugs, clean the terminals
and rubber seals. Also check that the suppressor connectors are in good condition. Cracked or damaged connectors
should be replaced.
pg. 122 Maintenance and service
Working on your car
Note the following before you begin working on your car:
Battery
Ensure that the battery cables are correctly connected and tightened.
Never disconnect the battery when the engine is running (e.g. when replacing the battery).
Never use a fast charger to charge the battery. The battery cables should be disconnected when recharging.
The battery contains acid that is both corrosive and poisonous. It is important that the battery is handled in an
environmentally friendly way. Let your Volvo dealer assist you.
Hoisting the car
If a garage jack is used to lift the car, the two jack attachments points should be used. They are specially reinforced to
bear the weight of the car. A garage jack can also be placed under the front of the engine support frame. Take care not
to damage the splash guard under the engine. Ensure that the jack is positioned so that the car cannot slide off it.
Always use axle stands or similar structures.
If a two-post hoist is used to lift the car, the front and rear lift arm pads should be centered under the reinforced lift
plates on the inboard edge of the sill rail (see illustration).
WARNING!
The car ignition system has very high voltage!
The voltage in the ignition system is dangerous!
Do not touch spark plugs, ignition cables or the ignition coil when the engine is running or the ignition is switched
on!