Hi,
I know it is not easy to diagnose noise by description but some hints would be good.
'89 240 with b230k, 185.xxx miles.
I am hearing a sort of metalic whirring sound at tickover, it does not seem to change pitch as revs increase and is less noticeable with higher revs.
The closest comparrison sound is the water just starting to boil in my coal fired heating system.
It does not change with engine or outside temperature.
Thanks
Keith
My '83 has one of those mysterious noises too. Doesn't happen all the time though. On mine it is like a buzz... you can feel it as well as hear it. Like a power steering pump that's low on fluid except it doesn't change pitch with rpm's. If it had a big ol electric fuel pump under the hood, I'd say it was that. Injection pump? Torque converter maybe..? I dunno.
Puzzling, but it's been that way for years so it can't be that big of deal.
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