Coolant — General Information (Opel Vectra A)

1. Antifreeze should be present in the cooling system year round to prevent corrosion of engine components. The coolant should consist of clean, preferably soft water and a good quality antifreeze containing an anti-corrosion additive. Make sure the antifreeze you use is ethylene glycol based, as cheaper types (methanol based) evaporates over time.

2. The ratio of water to antifreeze depends on the required degree of protection. The minimum proportion of antifreeze at which the coolant has sufficient anti-corrosion properties is 25%. For absolute protection of the liquid from freezing, use a mixture containing 50% antifreeze. For further information, see the manufacturer's instructions.

3. The coolant should be changed every two years, as the anti-corrosion additives lose their effectiveness over time.

4. Before filling the system with new coolant, drain the old fluid and flush the system as described in Chapter 2 and Chapter 3. Make sure all hoses are securely attached.

5. Fill the system as described in Chapter 4. Remember that future top-ups should be done with coolant in the same proportion.

6. Do not use antifreeze in the windshield washer system as it will damage the paintwork of the vehicle. Please note that antifreeze is poisonous and should be handled with due care.

[Material published on the website OpelBook]