BMW E90 OIL BREATHER

[rhonwynlee4]

Hi, guys I own a bmw E90 323i 2010 model. My engine have been making this wheezing sound like a whistle, havinf a rough idle. How can i fix this DIY? Plz help

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[Lloyd09]

I had a whistling sound coming from my engine bay, turns out the o-ring on the water pipe attached to the head needed replacing.

Are you able to identify where the sound is coming from?
Do you have to fill coolant often?