04-25-2018, 06:34 AM | #1 |
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coolant is grey greenish color
So about a week ago my water pump failed while driving on the highway. I couldn’t stop it right away but after 30-40 seconds I got it on the off ramp and shut the car off. I was curious to see if there was oil in the coolant (god forbid the head gasket went) no oil but the coolant was a grey greenish color. Any help would be appreciated. The car is a 2009 335xi.
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04-25-2018, 09:11 AM | #2 |
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Was the coolant a different color last time you checked ?
Blown head gasket and oil in coolant meant the coolant looks like chocolate-milk. A few droplets of oil floating around in an overflow tank in a 9-year old car is not unusual. |
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04-25-2018, 11:04 AM | #3 |
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That's the appropriate coolant color. You may find more help on the 3 series E9X forum rather than this forum which pertains to the 2 series.
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04-25-2018, 11:22 AM | #4 |
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I would compare the coolant colour with new BMW coolant. It should be more blue than anything. If it looks too green, it has probably been topped up with the wrong coolant at some point, which could lead to cooling system problems (most likely corrosion and sediment if Prestone has been added). I would ensure the system is properly flushed and filled with the correct BMW compatible coolant when the water pump is changed, not just topped up.
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