Volvo 240 - Manual (Page 79)

1987 Volvo 240
Check coolant level
The cooling system must be filled with coolant and not leak to operate at maximum efficiency. Check
the coolant level whenever you refuel. 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 the
cooling system has been drained.
Do not remove the filler cap other than for topping-up with coolant. Frequent removal may prevent
coolant circulation between the engine and the expansion tank during engine warm-up and cooling.
CAUTION
The cooling system must always be kept filled to the correct level.
If it is not kept filled, there can be high local temperatures in the engine which could result in damage.
Top up with coolant
Top up with coolant by filling the expansion tank when level is at the "Min" mark. Use a mixture of 50
percent Volvo Type C coolant and 50 percent water all the year round. Top up to the "Max" mark.
If the engine is warm, and you are going to add coolant, unscrew the cap slowly in order to allow
any excess pressure to escape.
Note: Do not add water only. Water by itself reduces the rust-protective and anti-freezing qualities of
the coolant and has a lower boiling point. It can also cause damage to the cooling system if it should
freeze.
See "Specifications" section of the manual to type of coolant recommended.
Cooling system
The risk of overheating is greatest, especially in hot weather, when:
- towing a trailer up steep inclines for prolonged periods at full throttle, and at low engine rpm.
- idling for prolonged periods while the air conditioning system is in operation.
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