so recently a noise has been emanating from the rear cam tower, over one piston in particular, i tracked the noise with a stethoscope. today i decided to tear into it to see what was making this horrible ticking noise. thinking that it would be a simple matter to remover the cover, i got this far and hit a road block.

i cant seem to get it to separate from the lower portion.
here you can see where the whole thing started to come off, not what i wanted.

finally after some wiggling jiggling and prying, it started to come off, but the section by the timing cover isnt budging. i asked my gearhead neighbor and he seemed to think i wouldnt need to remover the timing cover (god i hope not, the motor is still in the car)

im at a road block, where do i go from here?