Rashman4u Posted January 21 Share Posted January 21 Hello everyone, I have been observing and noting the valuable advise shared here. I own my cherished 2011 E92 330d equipped with a N57 engine. Over the years, I have removed the manifold to clean the flaps, changed the EGR valve, wheel sensors, and many other components; overall, it has functioned impeccably. She has 165,000 miles on the odometer with a complete dealership service history. Following the most recent oil treatment, I observed a tapping noise that occurs when the engine exceeds 1,500 rpm, varying in intensity with the engine revs. After around 10 minutes of driving, it becomes much quieter to the extent that I can hardly hear it. I am unable to identify the source of the issue inside the engine, and the only problem indicated by the diagnostics is a faulty glow plug, which I will address. I think the most probable issues are a faulty lifter, injector, or, hopefully not, a timing belt problem. Do you have any suggestions or insights? Quote Link to comment Share on other sites More sharing options...
MrGreedy Posted January 21 Share Posted January 21 When maintaining engine revolutions at 1500, is there any audible noise? Additionally, at a cold start, is there any atypical noise emanating from the back of the engine? Quote Link to comment Share on other sites More sharing options...
Rashman4u Posted January 21 Author Share Posted January 21 It likely begins at 1300 RPM; if I maintain it at that level or 1500 RPM, there is a persistent tapping noise that fluctuates with the RPM. I have not seen any issues during the cold start. I attempted to share a video I recorded, but the site does not let it. 😞 Quote Link to comment Share on other sites More sharing options...
MrGreedy Posted January 21 Share Posted January 21 You must upload to YouTube or a similar platform and share the URL. The description suggests it resembles timing chain noise. Quote Link to comment Share on other sites More sharing options...
Rashman4u Posted January 21 Author Share Posted January 21 Here you go MrGreedy thanks for the YouTube tip Quote Link to comment Share on other sites More sharing options...
Rashman4u Posted January 21 Author Share Posted January 21 Â Quote Link to comment Share on other sites More sharing options...
Rashman4u Posted January 21 Author Share Posted January 21 I hope this is effective; I would have assumed that if the issue were with the chain, it would be audible at idle as well. Quote Link to comment Share on other sites More sharing options...
MrGreedy Posted January 21 Share Posted January 21 The noise is audible and resembles chain strain in that little movie. Quote Link to comment Share on other sites More sharing options...
guyskin Posted January 21 Share Posted January 21 It is strange that you just saw it subsequent to the oil change. My vehicle seems to operate more quietly after the oil change, or at least that is my impression. Quote Link to comment Share on other sites More sharing options...
Ortsmatt Posted January 21 Share Posted January 21 A friend in Liverpool had similar sounds, which were ultimately identified as originating from the harmonic balancer, at around the same mileage. Quote Link to comment Share on other sites More sharing options...
dave783 Posted January 25 Share Posted January 25 i think is due to a cold start Quote Link to comment Share on other sites More sharing options...
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