I flushed my radiator today (internally, not down the toilet). Perhaps someone would care to assist with some follow-up questions. First time ever on this procedure. 1) How long is it supposed to take for all the old coolant to leave the system? Basically, I just kept running water through, refilling and letting it drain until the water looked more or less clear--initially with the engine off, then with it running (fingers out of the way, it gets hot). The whole process took about 30 minutes. 2) The initial impulse to do this came from the desire to replace the old hoses. Upon finishing I noticed a trickle of a leak coming from the recently tightened hose clamp which them seemed to dissapear again after driving for 30 mins or so. I will try to tighten it some. Is it a good idea to thoroughly clean all the deposits off the fittings before installing new hose? 3) Is there an easier way to get to the hose coming off the water pump? I ended up removing the alternator to get to it.