Turbo knocking on 300TD?

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Hola my PeachParters. I have another possibly odd question here. The turbo on my '85 has not worked in some time and I am trying to troubleshoot that once I get a vac gauge. (There are no obvious broken line or parts).

My question here may or maay nor be related, but it seems like there is a lot of chatter/clatter coming from the turbo itself lately. The engine is noticeably noisier at idle and almost sounds similar to a gas engine that has spark knock. Obviously that is not the case here, but wondering if anyone might have run into similar prob like this before.

As I mentioned in a previous post, the turbo has been inop for some time (no whine) but the car still runs good- albeit lacking kick and hill-climbing power.

Appreciate the input and responses here as always! Thanks.