Cooling system Checking the coolant level WARNING! Do not open the coolant filler cap in the expan- sion tank if the engine is hot. Hot coolant and steam may spray out and cause burns. If the cap has to be opened do it slowly and care- fully to release the pressure before removing the cap. Wear gloves as the coolant is still very hot. IMPORTANT! It is not permissible to top up large amounts of coolant via the expansion tank. Filling via the ex- pansion tank leads to air pockets in the cooling system which can lead to e.g. damage to the cool- ant pump shaft seal. If a large amount of coolant must be added, follow the instructions in the sec- tion Filling coolant.
Never fill a large amount of cold coolant in a hot engine. There is great risk of cracks forming in the cylinder block and cylinder heads. Only pour pre-mixed coolant into the cooling system. 1. Open the expansion tank cap and check the coolant level. The right coolant level on a cold engine is even with the lower edge of the filler neck. The right coolant level on a hot engine is approximately 25 mm (1 in) over the low- er edge of the filler neck. 2. Top up with coolant as necessary. 00:23-02 en-GB 24 © Scania CV AB 2016, Sweden