W123

Mixing injector cores when rebuilding?

I need to rebuild the injectors on my 1979 300TD, and I have a set of Monarks that I ordered here. I have access to a pop-tester and a shim kit.

I asked my mechanic about obtaining cores so I could do the rebuild at my leisure. He sold me ($50) a mixed set of turbo and non-turbo injectors, after measuring them and deciding it would work.

I don't think he's correct. I suspect the springs in the turbo injector bodies are stronger, and that no amount of shim removal is going to get me the required pop pressure.

Can you confirm or deny?

thanks!!

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Valve Adjustment 83 MBCDT

Mercedessource Diesel Valve Adjustment Procedures calls for and shows the cam lobe to be straight up, ie vertical.
Mercedes Maintenance Manual: Tip of cam should be vertical in relation to the rocker arm.
Haynes states same and shows the lobe to be 1 o'clock. Diesel Giant says the same but shows vertical position in second photo of two lobe positions.
Vertical lobe or 1 o'clock looking front to firewall down the camshaft?

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