BMW N52 Valve Cover, Vent Hose And Oil Filter Housing - Whistling Noise Fixed
Channel: COMPLEX NOSHI
Date: 2022-02-16

Just wanted to document what I did, when replacing the valve cover to fix a whistling 2011 BMW 328i N52. Tried to find the most efficient want to do it. Hopefully can get some comments on other ways to improve this job. II was under the weather in this video, so just speed up the video lol.

The BMW N52 motor after 2006 has an integrated pcv system in the valve cover. Which means if there is an issue with the pcv system, the entire valve cover will need to be changed. In this instance I'm working on a 2011 BMW 328i, which at idle a whistling noise can be heard. If you open the oil fill cap the noise stops, which relieves the vacuum. I replaced the entire valve cover, along with the vent hose, and the oil filter housing gasket since it was leaking. This would be a good time to also change the serpentine belt and tensioner. The best part is I didn't have to remove the intake manifold.

This car also has a code for P2A7C - DME: VANOS, inlet, cold start. The vanos gears will need to be replaced. But will have to be done at another time. So while you have the valve cover off, check the vanos unit to make sure the bolts are not sheered off, or missing. In this case it was already sheered off and look like the broken bolts are in the oil pan already.

Parts List
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Valve Cover Install Kit - https://complexseven.com/products/rein-bmw-n52-valve-cover-install-kit

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NOTE: I don't claim to be an expert at this topic at all, just sharing the ​info I have found and experienced.