You can't use a bolt on pulley, it needs a different pump. You have several options, all of which involve removing the pump. If the pulley is worn you can rebush it and re-press and then pin it at right angles to the key. It'll give you many years of service if done right and will prevent you from having to toss a pump with low time in service. Buy a new pump with a bolt on pulley. The only thing this gets you is less hassle down the road when it comes time to replace it again. Buy a new pump with a new pressed on pulley. No matter what you do, be advised that with the pulley backed off you're going to destroy the rear of your pump. The instructions on wa well known tech note state the pulley must be pressed to a specific dimension on the shaft and no more. This is incorrect. The pulley must be pressed all the way until it seats against the bearing race and preloads the shaft seal, the dimension just happens to be what the author of the tech note found when he measured the old pump. There is a reason for that dimension, it's all the way down. In other words you need to press it until you can't go any further. This is because the rear of the pulley is used to preload the ceramic face seal in the pump. If the pulley backs away from the outer bearing race the the shaft will drift to the rear causing the seal to unseat and allowing the impeller to contact the rear pump housing. Ignore the specified dimension in the tech note and press the pulley all the way and leave the rear housing off to check for zero fore and aft movement of the shaft when done. The specified dimension should come out the same but don't rely on it as a stopping point. > > I've acquired another car which I'm restoring, and the pulley on > the > > water pump has creeped off of the shaft. It's now out to > > where it's over > > half an inch off of the shaft. The belts won't stay on at such an > > extreme angle. I've never heard of this happening. It didn't happen > > quickly and the pulley seems to be solidly on the shaft. I'm > > told it's a > > 2 year old Grady pump. > > > > Ken > > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/