Not sure what you mean with chain guide but the "protection" outside the chain ring is in its proper position and seems ok to me. Nothing has come loose or has and play in it (I have checked the crank, chain ring, the chain guard etc). I have also looked for cracks in case the frame is about to give but none found. Looking at it when it is still nothing seems out of the ordinary but then again I did not stare at it much when it was working.