"Chain like noise" between transmission and engine.
As you can tell I have a 540i that has just recently developed a new problem. I wish I could record the sound it makes but my only recorder is really not able to pick up the noise correctly.
Anyways, I have what sounds like a chain rubbing against something and this sound is definitely coming from the area between the rear of the engine and the front of the transmission. The sound occurs right when I start the car, accelerate, or maintain around 1400rpm. I do not hear the sound while coasting or cruising above 2500rpm. There is no loss of power, however the sound makes me believe there could be a very large problem so the car is currently parked.
Additional information, I just fixed the oil-pump bolt issue and retensioned the chain that drives the oil-pump hoping that would fix the problem, however it did not although there was 3 bolts in the pan that I had to replace.
Does anyone have any ideas about this, or have a similar problem? I was thinking it could be the flywheel making contact with something in that area, or, hopefully not, the torque converter doing something strange. I'll see if I can get a sound clip up here as soon as possible but if you have any ideas before then please share.
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