I have a 1984 300d with around 315k miles.
I lost vacuum yesterday. I pulled the metal vacuum pump check valve and it was hollow. A clear open path to the vacuum pump.

All of the internals must have deteriorated and then sucked into the vacuum pump.
It looks like I can remove the vacuum pump from the block with allen bolts or remove the front plate which is attached with phillip head screws.

That parts are probably jamming up the piston in the vacuum pump. I put a new check valve in but still very little if any vacuum.

Any thoughts?

Thx

pete

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