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Old 10-30-2009, 06:09 PM   #1 (permalink)
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Leaking coolant

Recently purchased MY 04 update 325Ci is dropping coolant despite the Thermostat, the Thermostat Housing and the Expansion Tank having been replaced in the past few months. I'm interested to see if other owners have similar experiences. Cheers
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Old 10-30-2009, 06:56 PM   #2 (permalink)
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Are there any obvious external leaks, or is your coolant level just mysteriously falling?
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Old 10-30-2009, 07:54 PM   #3 (permalink)
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Hi, it is actually dropping coolant onto garage floor. Is difficult to tel if the prb is simply a hose but I plan to check out that aspect.
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Old 10-30-2009, 08:20 PM   #4 (permalink)
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I wonder if the problem could be a result of the last time I added coolant when I filled the filler pipe to the top. The book indicates that coolant should only be added till the red indicator stick lines up with the top of the filler pipe or slightly higher. Maybe the coolant on the floor is simply overflow?
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Old 10-31-2009, 03:54 AM   #5 (permalink)
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There is no overflow, so if the float is at the correct position now, you have a leak, best thing to do is drop the under shield put some newspaper under, the next time you park up, the drops on the paper should give you a near on target where the leak is.
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Old 10-31-2009, 05:30 AM   #6 (permalink)
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Thanks Marti, cheers.
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Old 10-31-2009, 07:20 AM   #7 (permalink)
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If you still can not find the leak, a coolant dye is the next step...added to the coolant it shows up under ultra violet light. If I remember correctly just google 'coolant dye' and you should be able to find it.
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Old 10-31-2009, 04:44 PM   #8 (permalink)
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Much appreciated Marti.
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