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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 06-01-2009, 11:56 AM   #1 (permalink)
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87 325es Coolant Warning Light Stays On

I have filled the coolant to the recommended height but the coolant light stays on. Any suggestions?

...just bought the car this weekend so I am going through the issues I find...thanks for your help and sorry if this is a repeat post as I could not find this topic. - Ted
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Old 06-01-2009, 12:20 PM   #2 (permalink)
OMFG another one!?
 
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There's likely air in the system that must be bled out.
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Old 06-01-2009, 07:53 PM   #3 (permalink)
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drain and fill, work?

i was going to perform a drain and refill on the coolant anyways since there are no records on when it was done last...will this likely remedy my 'air' situation?
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Old 06-01-2009, 08:31 PM   #4 (permalink)
OMFG another one!?
 
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Only if the air is carefully bled out.
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Old 06-01-2009, 09:16 PM   #5 (permalink)
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My e30 had the same issue Normally it is the sensor has gone bad there cheap to replace...
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Old 06-17-2009, 04:32 AM   #6 (permalink)
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Originally Posted by AlpineSixAndSeven View Post
My e30 had the same issue Normally it is the sensor has gone bad there cheap to replace...

You have a pic of the sensor??
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Old 06-17-2009, 09:30 AM   #7 (permalink)
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Part #5

RealOEM.com * BMW E30 325e EXPANSION TANK
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Old 06-17-2009, 07:20 PM   #8 (permalink)
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what I do is fill the coolant resevour a little at a time while the engine is just a little bit warm, so that the cap comes off without spraying stuff all over the place but keeping the thermostat open...there's a point in there where you have both conditions...then I top the coolant off a little bit at a time and squeeze the radiator hoses one by one until no squishing sound. I always see the coolant level in the tank lower, then I add more coolant and do it again...eventually the system is stocked......button it up and there you go...good luck....
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Old 06-18-2009, 05:19 PM   #9 (permalink)
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thanks. i had a complete flush and fill done on the coolant system and I am still seeing the light. probably a bad sensor at this point. will try that.
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Old 06-18-2009, 06:48 PM   #10 (permalink)
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whatever, the only thing that trips the telltale lamp in the cabin is the cap on the overflow/filler tank.....that's it....try tapping the plunger on the cap and see if doesn't release....just a guess, but's that only thing that triggers that light...now...if the temp gauge runs high that's an issue.....
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Old 10-05-2009, 04:48 PM   #11 (permalink)
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changed the sensor this weekend...fixed the issue immediately...now I wish all of the repairs were that simple. :-)
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