REV-SPECIFIC SCREAM!

Dear Friends,

I have a light green metallic 1984 300d with 230ks on the clock.

It's been going nicely until recently when I had to have its fuel pump replaced and injection pump timing reset.

The latest development is a strange screaming sound. The engine begins to squeal only after a certain number of revs has been reached and stops if I either increase or decrease the revs. After a few minutes, however, it stops.

I realise this might be one of the V-Belts but I don't have the expertise to tell if they are too loose or excessively worn...

Any tips about the V-Belts or other causes of that spooky scream?

Thanks in advance,

David.

P.S. How cool is this list?! Thank you to all responsible!