5 Maintenance 5.7. Service procedure 5.7.1. Pre-start checklist Cooling system – checking the coolant level, top ping up coolant A wrong water/coolant mixing ratio will damage the radiator! Always mix water and coolant in the ratio 50 : 50. This also applies to countries with a hot climate. Danger of fire! Coolant may ignite at hot engine! Do not top up coolant, unless the engine has cooled down sufficiently. 1. Open the bonnet. 2. Check that the coolant level in the expansion tank is between the MAX and MIN markings. If the coolant level does not reach up to the MIN marking, top up coolant. 3. Therefore remove the cover cap of the expansion tank. 4.
Top up coolant until the level reaches up to the MAX marking. 5. After topping up, firmly close the cover cap. 6. Usually, the radiator needs not to be opened. However, for safety reasons it is required to check the refrigerant level in the radiator after 50 operating hours (see "5.7.9. Maintenance every 1000 operating hours" on page 5-61). 7. If the expansion tank is empty again after a short period of time, immediately have the cooling system checked for leaks and have any leaks repaired in the garage. 5-26 WA90-5 – VEAM270100 CAUTION CAUTION