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Old 04-20-2018, 10:07 AM   #1
2nd Gear Member
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Join Date: Sep 2011
Location: Toronto
Posts: 251
E39 M54B30 engine CCV (general question)

Hi all!

Do you know if the M54B30 engine has an issue with the CCV going bad?

Is the CCV known to go bad and need replacement every certain amount of km's?

I am asking because the CCV on my car was replace in 2012 with the cold weather package CCV, the car then had 150k on it. Now the car has 270k on it and I am just wondering if after 120k the CCV needs to be replaced.

I am trying to rule out (if possible) the CCV as a culprit causing a rough cold start.

Any helpful feedback is much appreciated!
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Old 04-20-2018, 10:40 PM   #2
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Yes they go bad ALL the time, just a few year life span depending on the brand used. At your millage you should definitely get it done!
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Old 04-22-2018, 12:13 PM   #3
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Thank you! I am looking into having my mechanic look into it and replace it if it's bad.

I live close to work so my drives are short (10-15 minutes) long and in the winter that's a bad thing for the car. And I have a second car I depend on for other longer drives, so I know my E39's CCV is kind of abused with these short drives in the winter. This winter I saw this white foamy substance under the oil cap and on the tip of the dip stick, which can't be good! It went away after I went on a long drive.

Last week I had an oil change and now the car idles much better.

The only thing is that they say bad CCV causes black smoke. My car doesn't have black smoke from the exhaust. Only white smoke and it's gone now after the oil change of last week (I also did an engine oil flush before the oil change, so may be that's why the white smoke is mostly gone now.) But there is no black smoke!
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e39 m54b30 530i ccv

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