1993 Volvo 850 GLT
pg. 8:6 Servicing (cont.)
The following precautions must be observed when carrying out repairs to the vehicle
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:
●
Connecting engine test and diagnostic equipment to the vehicle (timing light, tach-dwell tester,
ignition oscilloscope, etc.).
●
Replacing distributor ignition components e.g. plugs, coil, etc.
●
Do not touch any part of the distributor ignition system while the engine is running. This may result
in unintended movements and body injury.
Battery
●
Check that the battery cables are correctly connected and properly tightened.
●
Never disconnect the battery when the engine is running, for example when changing the battery.
●
The battery should be disconnected when a boost charger is used.
●
Switch off the radio before disconnecting the battery. If your radio has an anti-theft code and the
battery is disconnected, the radio code has to be re-entered in order for the radio to function.
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 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.
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 and under the reinforced plate in the spare wheel well. 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 arms should be positioned under the
reinforced lift plates on the bottom rail. The position of these plates is marked with arrows on the side of
the bottom rail, see illustration below.
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