escort 1800 diesel very noisy

hi     My local mechanic changed the water pump, cam belt and pump belt on my '94 escort van today. When he returned it, the engine was extremely
noisy (knocking loudly). He suggested I get rid of the van asap as the engine is shot.
Now this engine was not making this sort of noise before having this work done, and a friend has suggested that the injection timing could be out, causing what he called "diesel knock".
Could he be right. If so, how do I remedy this.
Many thanks for any help
Steve L
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The injector pump could very well be out of time, and will cause a knock. The engine needs to be retimed before it self destructs.

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says...

Many thanks Thomas. I shall take it to the local diesel injection specialist.
Steve L
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Hell... I think I want to see an Escort VAN!
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