A piece cut off an old speedometer cable chucked into a cordless drill motor makes for an excellent "snake" for chasing crud in places like water jackets. Just be sure to melt the end of the cable into a solid blob with a torch to keep it from unraveling. I've also used a short piece of very heavy weed eater string as a snake for clearing pasageways like oil galleries in crankshafts, etc.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!