I'll answer what I know and leave the rest alone: The part in the center is a small metal ring that bolts to the crank. The outer part that has the timing mark scribed on it is connected to the inner ring with rubber, and this rubber goes bad after time. It is my undertanding that all of the pulleys are pressed or welded together and are steel only. they seperate from the harmonic balancer and could be replaced with similar from a different engine with no problem. That means that the pulleys and the balancer are different issues. It seems to me that the balancer would balance the crank and dampen shock. It has a woodruff key so can only be oriented one way, and thus "wants" to be lined up in a certain way with the crank. As the crank spins, it would "want" to be balanced and "should" match the crank, right? Someone that knows better can answer 2 questions?: "is the harmonic balancer something that is particular to a crank-shaft" "to what degree are they interchangeable?" I have not researched this, but there might be info in the FSM or the MTSC sections of the website. Would be interesting to know.... --- If it is your pulley(s) that have failed, and your balancer was not affected, you should just have an issue replacing pulleys, and the balancer isn't part of the problem (?). Therefore, if you have replacement pulleys that do not match the ones that failed (diameter, offset, or bolt-hole spacing), you have an incorrect part. Imperial parts can be devilsh to match up. AC, non AC, year, model, etc seem to vary, even within the same year. It's a LOT harder to do right from the parts-man's perspective than it looks, so patience and highly detailed descriptions are often required. I probably mis-read your email, but is sounds to me as if Bob simply missed on his first try. You could take your clapped-out unit and put it on a photo-copier and then use that to fax the bolt pattern to him. Measure the other dimensions and draw them on the same page. That's how I'd go anyway. -K --- barrypk1@xxxxxxxxxxx wrote: > Has anyone had experience repairing a ripped out > rear crankshaft pulley? My > 63 Southampton exoerienced a failure of the rubber > mounting ring inside the > a/c-alternator double pulley. I sent away to Bob > Hofmeister for a used > pulley, but found that the holes for mounting it on > the harmonic balancer did > not line up. > > A couple of questions: Why are the mounting holes > unequally spaced? Is that > a way to balance the pulley with the harmonic > balancer? Is it true, as > Kenyon may have intimated, that the pulleys are > mated to the balancer as a > pair? > > Damper Doctor says they can revulcanize my pulley, > but if they do, will it be > in balance? Since the old rear double-pulley is > broken off the shaft of the > double front pulley, it may not be possible to > revulcanize it in exactly the > same position on the shaft. Is that a problem? > > Has anyone any exoerience with Damper Doctor's work > on this type pulley? I > have concerns about sending away the only pulley > that seems mated to my > engine. > > Thanks, > Barry > > > ----------------- http://www.imperialclub.com > ----------------- > This message was sent to you by the Imperial Mailing > List. Please > reply to mailing-list@xxxxxxxxxxxxxxxx and your > response will be > shared with everyone. Private messages (and > attachments) for the > Administrators should be sent to > webmaster@xxxxxxxxxxxxxxxx > To UN-SUBSCRIBE, go to > http://imperialclub.com/unsubscribe.htm > > ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm