YOu can pull start them.

I would be surprised if its the fuel lines, injectors or injection pump. Those are the first things a non experienced mechanic will suspect and the last that an experienced one will suspect.

I bet its a fuel problem or glow plug problem. After that I would suspect the compression.

I'd put a strong dose of biocide in the tank and wait a few days and then would crank and see if you are getting fuel to the injection pump. I would check and change the filters, prime the injection pump and check for glow plug function.

If you don't have glow action a pull will start it if you have compression and fuel.

Don't change any of the things the mechanic said until you try the things above.

Good luck!

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.