so the noises were just coincidental?
could be but i wont know untill and if i get in there
the noise that vanished doesnt concern
me
the hard starting and oil pressure reading does
but they could be connected

For the Oil pressure as previously said you either change the sending unit (check it ti be sure the Wire is still securly attached) or find another way to test for Oil pressure.

It is entirly possible that moving the car and runing it loosed stuff in the Fuel Tank and the Tank Screen or Filter are plugged.

When I first got my 300D it would occasionaly make a terrible metalic noise. It turned out the Air Filter Housing was loose and even when tightend would occasionally beat on the Intake Manifold.
Some have had the Air Filter Housing Bracket break.

Some of the noise you described could have been the Vacuum Pump having issues but you did not complain of a loss of vacuum.

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84 300D, 82 Volvo 244Gl Diesel