hi
 

hi guys im new to all this how is everyone? i wondered if anyone can help me my 318i auto 2002 keeps running out of coolant and i dont know why please help :cry:

Possibilities:

One or more components failed/leaking (i.e., coolant reservoir, radiator, hoses, etc.)

Cracked head

Cracked block

Failed head gasket

Have the cooling system pressure-tested, and report back here.

MOST LIKELY cause is the coolant expansion tank is cracked and is leaking. This is a very common failure on your car. A lot of times it comes from overfilling the expansion tank, then after it pressurizes, it cracks around one of the hose fittings.