After a couple of years it is usual business that chainguide is dead ! Here are a few shots of a chainguide change procedure (e-thirteen LG1 suitable to ISCG-05 standard).
Chain & Crankset removals
For the chain find the smart link and unlock it. For the crankset use the proper tool.
Broken Chainguide Removal
Broken chainguide uninstalled.
Unscrew the the three bolts. Do not lose the washers : they could be reuse.
Carefully read what’s inside the box !
LG1 Chainguide Installation
Chain ring change 😉
It a good idea when fine tuning chain guide accurately if it is not time to change chain ring also : here a 36T swith to a 30T Race Face Narrow Wide chain ring. The narrow wide patent allows to remove upper chain guide with confidence. Not shown on the pictures the bash guard can be switched to the smaller one that comes with the e-thirteen LG1 box.