Checking Coolant Level - BMW 318i Owner's Handbook Manual

Checking coolant level

1. Allow the engine to cool down.
2. Turn the cap on the expansion tank slightly
anti-clockwise until it starts to open, then
allow the pressure to escape before open-
ing it fully.
3. The coolant level is correct if it is between
the maximum and minimum marks in the
filler neck, see also diagram next to the filler
neck.
4. If necessary, slowly top up to correct level
but do not overfill.
5. Fit the cap and turn until it is clearly heard to
click into place.
6. Have the cause of coolant loss rectified as
soon as possible.
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