Alternator Nut. Please Help!!!

[flashback87]

Hey guys,

Can someone tell me if the nut that holds the alternator pulley on is a special not. That nut fell off this evening causing the pulley to shift and shred my belt. So now my car is stranded.

Can I just go to Lowes/HomeDeport and get any nut or is it a special nut. Also, is there any kind of washer that needs to be used too?

Oh and it is a 3g alt from a Taurus.

Thanks!

 

[mustang55]

They are just a 5/8 course thread nut 15/16 socket to install but there only about half a thick as a regular nut and yes there is a lock wash that need to be put back on to keep it from backing off again. I just put new under drive pulleys on mine tonight


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[Mustang5L5]

I've put a paint dab on the nut/shaft seam and monitored that to see if it was loosening

 

[flashback87]

They are just a 5/8 course thread nut 15/16 socket to install but there only about half a thick as a regular nut and yes there is a lock wash that need to be put back on to keep it from backing off again. I just put new under drive pulleys on mine tonight


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Thanks! so can I just get a nut and lock washer from a hardware store?

Also, in regards to your under drive pulleys, I kept the Taurus pulley on originally but have an underdrive pulley I might swap now that it is off. Does your u/d pulley sit all the way against the alternator? I noticed my Taurus pulley sits off the alternator a little but when I put the u/d pulley on it sits completely on the alternator which I would think would create a lot of friction and heat.

Thanks again!

 

[mustang55]

No it want all the way down on the shaft but wasn't touching the case


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[Mustang5L5]

You can use a 5/8" ID washer as a spacer. It's pretty common for 2G alt pulleys and underdrives to sometimes hit the case. In this situation, a washer as a spacer helps

 

[flashback87]

Ok, I went to lows and tried a 5/8 nut. It would only catch one thread. Also the nut was a lot thicker. Does the 3 g alt have a different size?

Does anyone know where I can find this nut?

 

[madspeed]

5/8 course thread, maybe 16. Which one you get?

 

[flashback87]

Well, I had a mechanic measure it for me and try some different nuts. I have a 3g alt from a Taurus and it seems to be metric, 16mm x 1.25.

 

[jcgafford]

Why not hit the salvage yard for one?

 

[7991LXnSHO]

Get a hardened one no matter the size. Grade one or two can strip too easily. Grade 5 or 8 are much better under the hood. These are all available from most Ace stores or Do It centers.

 

[7991LXnSHO]

Why not hit the salvage yard for one?

er: 181951"]Why not hit the salvage yard for one?[/quote]
Salvage yards are not a good option in a part of the country that crushes anything over 20 years old. And even worse if other is one place per big town.