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      06-04-2016, 09:47 AM   #1
rnbguy
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Can someone check their coolant expansion tank please?

Hi I have a bmw x6 2010 and noticed my expansion tank has a hole in it next to the cap. does anyone know what this is for? Should it be a hole or have a small cover like this pic?

https://www.google.com.au/imgres?img...iact=mrc&uact8
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      06-25-2016, 09:20 AM   #2
Tailwinds
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Mine is a 13 and is different so can't help.
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      07-20-2016, 09:10 PM   #3
toptounov
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Yes, the hole is to dump the steam or extra coolant when the water pump fails and engine starting to overheat. Just to release the pressure.
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