Quote:
Originally Posted by Effduration
The ONLY aluminum valve cover I would use is the Genuine M56 valve cover, which includes a better CCV design...
I have seen a few complaints about fitment of the asian-made aluminum M54 valve covers. Though I have heard about cracks and warpage on plastic valve covers, I have never had a problem with any of the plastic valve covers on my BMW's - more than 6 vehicles...and I have several spare valve covers from previous engine rebuilds on the shelf...
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would you happen to have any spare newer covers for M54? I'm not looking to do anything extreme here, I'd prefer just the OEM plastic or asian made aluminum tbh doesn't look that bad, surprised mine has lasted this long tbh, I'm not having any codes or issues but I do have a small whistle noise when I am around 1.5 RPM even after replacing my intake boot, my theory is it might be the valve cover