Note: Check coolant level only when the engine is cold. Do not refill the coolant expansion tank if valve clearance still has to be checked/adjusted.
Checking coolant
Check coolant level through the sight glass in the left cover.
Top up the coolant if the level is below the MIN mark.
Adding coolant
Remove left cover (See Group 46).
![](https://motoinstruction.ru/img/bmw/10/116704.jpg)
Caution! Anti-freeze protection must be guaranteed to at least -30°C (-22°F). Use only nitrite-free long-term antifreeze and corrosion inhibitor. Do not top up expansion tank past the MAX mark (A).
Check antifreeze concentration in the expansion tank, top up antifreeze if necessary.
Note: Mix the coolant in a mix ratio of 50% antifreeze, 50% water.
Check coolant level in the expansion tank, top up coolant if necessary.
- Maximum level — A
- Minimum level — B
Installation is the reverse of the removal procedure.