Endyn stepper pulley poll

[rjaffey]

I installed mine over a year ago and haven't had any problems to speak of, but I noted that nut on the end of the alternator shaft only grabbed a few threads and I'm wondering if this is enough in the long run.

Who else has one?

What engine type?

How well does it fit on the alternator?

[Max Psi GSR]

I think myself, and 217GSR ran into "bolt to long" issues. We both cut the flange off and installed it backwards i think. Well, i did anyway. It seems fine, but i put some mack daddy loc-tite on that sucker! [img]wink.gif[/img] So far, so good.

[JRCivic]

I, like the rest of you who have spoken up on this issue, had an ENDYN stepper pulley on my Blackbird engine. The motor awaits installation... once I created my own pulleys, I decided to remove the ENDYN stepper and replace it with my own. Upon removal, I discovered the same problems that the rest of you have complained about... and I bought mine nearly TWO years ago !!! The nut did not grab more than 1 and 1/2 threads on the alternator shaft... as a matter of fact, by using an impact gun to install the nut, I actually overstressed the last thread of the alternator shaft !!! I have purchased a new nut to use with the MVM pulley, however, I must repair the damage to the alternator shaft first. I have sold many of these pulleys (ENDYN) in the past, and I have not heard any reports of pulleys coming off... or damage to the alternators. I assume that most, like I, did not realize that the alternator nut only grabs a couple of threads on the alternator shaft... and completed the installation without further obstacle. The ENDYN pulley, although similar to the JR Type "R" pulley, is NOT a good fit for a JRSC Type "R" blower kit. There are interferences with the backside of the pulley.

The two JR alternator pulleys (GSR and "R"), if set side by side, look identical as far as the overall height and location of the belt ribs are concerned. The changes in the "R" are two-fold: there is additional contouring of the backside of the pulley, thus making the inside base longer than the GSR pulley. This in turn, by offering up a suitable "body" thickness to maintain proper strength... creates a center bore that is WAY too long for the GSR alternator shaft.

Because of these differences, I chose, just as JR did, to create TWO different pulleys to properly fit ALL "B" series blower kits.

<font color="#a62a2a" size="1">[ March 03, 2002 03:32 PM: Message edited by: JRCivic ]</font>

[randomwalk101]

Same here...seems like earlier version of the Endyn pulley was a perfect fit. Later batches, the pulley was modified and it was too thick...a solution is to file the flang nut down and bolt it on backward with lots of loctites.
But seriously, why bother with Endyn's pulley anymore if Jim has one that would fit perfectly?

[217gsr]

I would've started my own post. . .but sadly, I am the only person who has run into problems (down the line) with my Endyn pulley.

Most of you know about the fitment issues that the Endyn pulley owners had. Basically, not only did I have to machine away several millimeters on the interior of pulley, but once that was done, the nut could only grab several threads (note: I didn't use any loctite as the alternator spins opposite to the threading). This install was done 2 months ago on 12/29 (3000 miles ago).

YESTERDAY:

I'm driving to go pick my girlfriend up, and I'm getting off the freeway. The car is running great (just did a valve adjustment, changed my idler pulleys, s/c belt, and installed my new carsound cat)! I did not beat on the car (ie. drive it past 4500 rpm) all weekend. I hear a loud noise and see white smoke coming out the back. Battery light goes on. I instantly think, "broken belt."

I pull to the side of the road and pop my hood. Expecting to see belt carnage, instead, I notice that all the belts are intact, but the Endyn stepper is "hanging" off the alternator shaft. Luckily, I could still drive the car, and once I got home, I checked a little closer. The way the pulley looked, I thought that the alternator shaft actually broke off.

What actually happend was that the nut came off and the Endyn stepper worked its way off the alternator. This threw off my supercharger belt and the alternator belt. Car was still driveable (felt like stock [img]smile.gif[/img] ).

I'm getting a clutch installed later this week, so until then, I've already ordered a new nut (those things don't fall off often, special order only), and a stepper pulley from JRCivic. Everything should be here by Thursday. In the meantime, I'm driving my girlfriend's Volvo 840. When the parts come in, I'll have the shop install everything together.