5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
Recently I notice that it only take 2 to 3 minutes(from starting the car) for the temperature gauge to reach the middle point under NORMAL WEATHER(around 75F degree) and under normal driving speed, around 35 miles per hour. Then the temperature needle will stay at middle point even after long driving.
My concern is how come the temperature jumps so quickly in 2-3 minutes? Any possible problem with the radiator or, it's time to flush/change coolant? Would there be warning light in case the car is overheat?
Once you start the car the temperature will normally heat up fairly quickly if you start driving straight away, and the rate of increase will normally be slower if you just let it sit and idle. If the gauge is settling at the same mid point either way, I wouldn't get too worried about it. It doesn't hurt to change your coolant every 18 - 24 months depeding on your specific circumstances.
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