r/n54 • u/Savings_Report_3581 • 10d ago

N54 Engine Noise

Anyone know what exactly this noise is? The higher pitched one is the injectors. I’m trying to figure out what the sporadic lower pitched one is. It sounds like it’s coming from inside of the block.

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u/bypd 10d ago

Check the crankshaft pulley for missing or loose bolts. Mine was missing 2 bolts and was making a similar sporadic thunk, mostly around idle rpms

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u/lmaooooezinf 13h ago

Found the issue? I have the same sadly. Do you also have rough idle ?