I removed the radiator cap today (not to be confused with the reservoir cap) and to my surprise the entire elbow was filled with solid-like debris. I drained the radiator yesterday and the fluid was clear .. no debris at all. Is this a common problem? I compared it in my head with the debris left at the beach at the high tide line - just because there is **** all over the beach doesn't mean there is **** in the ocean. I had to take the whole elbow off, along with a piece of tubing and empty all the crap out of it. Should I be taking any other precautions now that I've got the bike apart?