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Old 04-05-2020, 01:45 PM
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crystalworks crystalworks is offline
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You drop a tool in there? Use a torque wrench to tighten everything? Maybe a bolt came loose? Any codes? Did you inspect the chain guides that were visible? I also seem to remember certain n52's having problems with the cam gear bolts sheering or backing out.

I doubt the sludging is the problem. Here is what a 182,000 mile n52 looked like last year when I bought my E61 wagon. Previous owners were not kind. Looks much better now after some Seafoam and ATF in the crank case treatments. Runs like a champ.

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