Chapter 5 N40469 How to fill the coolant circuit Warning! If coolant is to be added to the circuit during service, allow the engine to cool before the coolant is added. Remove the filler cap slowly as dangerous coolant could be discharged if the coolant is still hot and the system under pressure. Do not put too much coolant in the coolant circuit. There is a relief valve in the filler cap which will open and release hot coolant if too much coolant is added. Caution: If coolant is added to the circuit during service, it must consist of the same original mixture as used to fill the system. 1.
Remove the filler cap (1) of the header tank and Figure 1 slowly fill the coolant system until the coolant level is just below the pipes inside the header tank. 2. Wait for five to ten minutes and check the coolant level, add coolant if necessary. Fit the filler cap. 3. Start the engine. When it has reached its normal temperature of operation, stop it and let it cool. 4. Remove the filler cap of the header tank and add coolant until the level of the coolant is between 25 mm (1.00in) and 40mm (1.50in) below the bottom of the pipes. Fit the filler cap. Page 26