Volvo XC90 owner manual Belt check, Check coolant level, Changing coolant

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09 Maintenance and servicing

Working on your vehicle

Belt check

Check the belt regularly to make sure it is in good condition and is clean. A worn or dirty belt can cause poor cooling and low alternator out- put as well as impair the operation of the power steering and the air conditioning unit.

NOTE

The drive belt is equipped with a self-ten- sioning mechanism and requires no adjust- ment between changes.

WARNING

The engine must not be running when this check is performed.

Check coolant level

The cooling system must be filled with coolant and not leak to operate at maximum efficiency. Check the coolant level regularly. 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 when the cooling system has been drained.

Do not remove the filler cap other than for top- ping up with coolant. Frequent removal may prevent coolant circulation between the engine

and the expansion tank during engine warm up and cooling.

Changing coolant

Normally, the coolant does not need to be changed. If the system must be drained, con- sult a trained and qualified Volvo service tech- nician.

Do not top off with water only. This reduces the rust-protective and antifreeze qualities of the coolant and has a lower boiling point. It can also cause damage to the cooling system if it should freeze. Top off with Volvo Genuine Coolant/Antifreeze only (a 50/50 mix of water and antifreeze.

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. Dif- ferent types of antifreeze/coolant may not be mixed.

WARNING

Never remove the radiator cap while the engine is warm. Wait until the vehicle cools.

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