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ideas?...strange low coolant problem 2006 530i

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Old 01-21-2010, 10:09 AM
  #11  
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Dutch....

Same thing happened to me So they figured the reservoir for coolant had a crack on the bottom portion of it. Its a tough one to spot but maybe you can tell them to look for it.


Good luck to you!!!!!!!
Old 01-21-2010, 10:20 AM
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I had this happen to me, turned out to be a small crack in one of the hoses. It wouldn't leak unless I drove for a long time (10hr highway trip) and had enough heat that the hose warmed up enough to flex, so I never saw any coolant on my driveway just mysteriously losing coolant.
Old 08-26-2015, 03:44 AM
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Default the leak

Originally Posted by Dutch 530i
Problem has been found. It was a ring inside one of the pipes coming from the radiator which was worn. The mechanic said it was very hard to find!
Another pressure test finally found it.

Thank god it wasn't something more severe!!!!!
Can't wait to get it back:-)


I have the same problem, we cant find the where the leak is from, you said it was a seal inside one of the radiator hoses, could you describe me which hose was it?
Thanks
Old 08-26-2015, 04:47 AM
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Coolant system dye and a UV light will lead you to the leak.
Old 08-26-2015, 06:11 AM
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Default the leak

Originally Posted by syrousd
Dutch....

Same thing happened to me So they figured the reservoir for coolant had a crack on the bottom portion of it. Its a tough one to spot but maybe you can tell them to look for it.


Good luck to you!!!!!!!



Thanks! We disassembled the radiator, check the hoses and rings, pressure tested the radiator, we couldn't find the leak, I'll take a closer look at the reservoir tank, , but I can tell its leaking, specially in cold weather it seems to be more....
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