Volvo 240 - Manual (Page 80)

1987 Volvo 240
- stopping the engine suddenly after high speed driving, so-called after-boiling.
To avoid overheating, the following rules should be followed.
●
Reduce speed and downshift 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 while.
●
Do not let the engine idle unnecessarily.
●
Do not stop the engine immediately after highspeed driving, but allow the engine to idle for 1/2 - 1
minute before switching off.
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 following precautions should be taken:
●
Switch off the air conditioning system.
●
Stop the car and put the gear lever into neutral position-position N. Do not stop the engine!
●
Increase the engine speed to approx. 2000 rpm (twice idling speed).
●
Check the level of coolant in the expansion tank. Top-up, if necessary.
pg. 73 Alternator, Jump starting
Note: This car is equipped with an alternator.
When changing the battery or when carrying out work involving the electrical system, the following
should be observed:
1 A battery connection to the wrong terminal will damage the diodes. Before connections are made
check the polarity of the battery with a voltmeter.
2 If booster batteries are used for starting, they must be properly connected to prevent the diodes from
being damaged. For correct connection, see "Jump starting".
3 The battery leads should be disconnected any time the battery is being charged.
4 Never disconnect the battery circuit (for example, to change the battery) while the engine is running,
as this will immediately ruin the alternator. Always make sure that all the battery connections are
cleaned and properly tightened.
5 If any electrical welding work is performed on the vehicle, the ground lead and all the connecting
cables of the alternator must be disconnected and the welder wires placed as near the welding point as
possible.
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