Fuel Injector Pump 3.0 BiTdi 320HP Audi A6 4G 2015

Hello everyone,

We have a big problem: the fuel injection pump was removed without being secured from the rear.

The impeller (located within the chain case) has obviously sagged slightly, which means the high-pressure pump (CP4) cannot be mounted. While I can easily lift the impeller into the desired position with a screwdriver (the chain tensioner hasn't engaged), it doesn't stay in place. To access the impeller from the back, I would have to remove the entire turbocharger, which I honestly want to avoid.

Does anyone have any ideas on how to solve this problem?
Is there a way to position the impeller and apply tension via the crankshaft so that the impeller stays in place? It's essentially suspended like in a hammock and held by either the chain or the right-side engine mount (which connects to the camshaft).

I would be very grateful for any helpful tips.
Best regards and have a nice weekend.