I did not notice a valve adjustment in there, did he do that? Are you also saying he put in new glow plugs? Rough running on start up and light blue smoke is a sign of a non functional glow plug. If you have a glow or two out it'll be very tough to start, and if there is a tight valve in addition it would be very tough to start.

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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.