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Old 08-05-2004, 05:35 PM   #1
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Default SC coupling vs nose drive

I have been planning to change the coupler in my SC, and I thought I would call Magnuson to see what they had to say regarding which coupler to install. I was told that if my coupler is worn, this is because there is play in the nosedrive bearing or because the shaft has moved a bit and that if I just changed the coupler it would most likely happen again. And of course they suggest I buy the complete nose drive kit from them for $310.00.

So now I am confused. They should know what they are talking about, but they are in the business to make money.

I don't want to do all this work and then find out that something else is causing the coupler to fail.

Any comments???
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Old 08-05-2004, 05:59 PM   #2
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Many of us have changed the coupler successfully by itself. I'm in the middle of assisting with yet another (my boss at work, 95 SC Riviera).

The coupler is designed to be the part to wear, in order to protect the rest of the SC from the instantaneous torque of a belt-driven device upon initial throttle romp.

Magnusson has a point that these things MAY be issues, but in reality, our experience dictates otherwise.
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Old 08-05-2004, 06:26 PM   #3
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Quote:
Originally Posted by willwren
Many of us have changed the coupler successfully by itself. I'm in the middle of assisting with yet another (my boss at work, 95 SC Riviera).

The coupler is designed to be the part to wear, in order to protect the rest of the SC from the instantaneous torque of a belt-driven device upon initial throttle romp.

Magnusson has a point that these things MAY be issues, but in reality, our experience dictates otherwise.
Ditto...

I replaced my coupler about 30,000 miles ago, and it'* still holding up just fine!
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Old 08-05-2004, 06:40 PM   #4
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couplers cheap and easy to fix. It is possible your bearings may be going bad but you would probably be noticing oil seepage from the snout around the pulley.
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Old 08-07-2004, 01:18 PM   #5
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Ya, I was told the same thing. So I proceeded to take off my supercharger and take it to a machine shop and have all new bearings put in her and I also purchased the coupler from ZZP and put that in. I truly believe I would have only needed the coupler. But, $400 and about 3 months later, my front seal is leaking and I am told I will have to take it back off so they can redo the seal(free of charge, ya like my labor time is worth NOTHING! and the fact that I won't be able to drive my car for a long time.)
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Old 08-08-2004, 03:00 AM   #6
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The coupler is an easy fix, several of us have done step-by-step how to'* in the subject and will cost less than a hundred bucks to do. I did mine back in Jan and have put on more than 10k since and have had no problems yet. I've also done 2 others since. One 94 I bought for 1,200 because the "$2,000 supercharger" was bad, I fixed it and sold it for $4,400 ...that'* called "profit". The other I fixed for a guy at work for $350 and pocketed $250. for three hours work. Is this a great country or what? If you need help, go to page to of my site(below) which includes a how to and parts list, or check the Tech section for other help. It'* easy
good luck

ken
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