E34 M50TU engine 170K with regular oil changes throughout it's life. Got to work this morning, and noticed quite a loud regular tapping coming from the engine. Sounded like a severe tappet noise. An hour or so later, switched the engine on to let a work mate hear it, and it was still there but was hardly noticeable. Starting it to go home, engine sounded quite normal, and was still OK when I got home. Any ideas of the cause? Are these engines known for having the occasional sticky hydraulic tappet, because that is definitely what it sounded like, and it would explain why it apparently cured itself. Mike.
- posted
17 years ago