Taking SCARY out of used bikes, one bike at a time.
In this case all the crud needed to be cleaned out and as well as the Bottom Bracket. Most Bottom Brackets now days are sealed and usually okay, but there is always a chance of them being compromised.
If you’re getting noise from your cranks, this could be one of many reasons.
Over the years I have seen a lot of rust, dirt, metal shavings and even a bee. Yes a bee, poor little guy just took the last ride of his life.