My clutch master cylinder on the civic is goin bad and im gonna replace it tomorrow. It looks pretty straight forward ( two 10mm bolts and a clip to the clutch pedal) But what has to be done on the engine bay side?

 

I dont know for sure, but
just make sure you bleed the system when done

 

Just unbolt the hardline and drain the fluid.

 

very easy...but nothing to unclip from clutch pedal
and bleed it well