And how is it supposed to look?

 

The little box on top of your valve cover? That is your Crank Case Vent (CCV) that allows excess crank case pressure (blow by) to be vented, directing it into the intake for the motor. It is supposed to look the way it looks in your picture, just maybe a little cleaner...

 

Are the glow plugs under the little square boxes? We are new at this. Going to change the wiring harness under the valve cover gaskets and want to change the glow plugs

 

No that's the injectors the square boxes ur referring to the glow plugs are what the single wire running right above injector go to takes a 1/4 in drive deep well 10 mm to remove them

 

Thank you very much for your help. We appreciate it