So just recently I bought an 86 f150 with the inline 6 and the alternator was screaming when accelerating. Still puts out good voltage but I want to replace it. The double groove pulley is warped which I think might be the issue. Can you guys help with either a) finding an alternator with a double groove pulley or b) finding a double groove pulley for it? It is the 60 amp alternator with the internal regulator. Thanks

 

I looked them up on rockauto, and not all but most of the 60 amp alt's come with the double pulley. They have one for $28 but it's the external regulator. They have internal also. You need to figure out what you have.

P.S. I see you said you have a internal regulator alt. Let's keep looking.

 

It has an internal regulator

 

1980/89 F100/350, Bronco & Econoline 300 I-6 without Serpentine belt system:

C5AZ-10344-L .. Double Sheave Alternator Pulley - 2.84" diameter (Motorcraft GP-494) / Obsolete

NOS PARTS LTD in Waxahachie TX has 1 = 972-937-2201.

GREEN SALES CO. in Cincinnati OH has 1 = 800-543-4959.

CARPENTER NOS OBSOLETE PARTS in Concord NC has 6 = 800-476-9653.

 

Ok I see your problem, most of the alternators that come with dual groove pulleys are the external regulator type. The internal require a pulley change or they may even come with a serpentine pulley.

I guess you know your alternator type is prone to failure/catching fire at the wiring plug?

 

They have these but they are not cheap. $45.99.

 

Ford truck parts catalog makes no mention of internal/external regulator inre to the alternator pulley.

See post #4.

 

But then you have the real world. I thought it would be easy, I got on rockauto and saw a bunch of alternators for his truck with double groove pulleys installed. But they all turned out to be externally regulated. I then went autozone and the same thing happened. I would think he could find one though if he looked hard enough and if all else failed, go to the junkyard.

But, the alternator he is looking for is considered to be junk, he needs to entertain the idea of a swap to another type.

 

Why would the alternator be junk? Most newer vehicles have internal regulators

 

Thanks for your help guys with the part numbers

 

Junk as in Fords first internal regulator which is what yours is, is a 2G alternator and they are prone to catching fire. I even had one caught fire in a 89 E150 van. Luckily I found the whole charge harness at a local junk yard to replace the burned wiring.

The preferred alternators is either the 1G externally regulated and if you want more low rpm charge then an internally regulated 3G is your best alternative.

I will be changing my '82 F150 from a 1G to a 3G just for the better low rpm charge. I don't like how my blower motor on my AC slows down when I come to a stop and idle.

 

I believe as was mentioned you have a 2G alternator. For some reason instead of using a nice large stud and nut to put the large output wire onto the alternator, they decided to use a slip on connector. They did use dual connectors and two wires side be side, but it wasn't enough, this connection gets loose and then it causes heat. The connector melts, makes an even worse connection, and it's not good.

That's why you will see notes on some of the alternators that a new harness plug is required to be installed for a full warranty, or some other mention about a plug.

This alternator may be your only choice if you are not equipped to change stuff around. My ranger had one of these alternators, and instead of spending money on a new one, I converted mine to a GM alternator. I did have to drill the hole bigger on the alternator, and modify the adjuster bracket some to make it fit.

 

All the factory double sheave alternator pulleys I've seen use the second belt to drive the A.I.R. pump.

Finding a crank pulley that allows you to have two alternator belts, and still drive the water pump and power steering is going to be the issue
Crank sheaves must be the same size and not in the same plane as those driving other accessories.

 

I just posted this on another thread:

 

I don't find the alternator pulley is that big an issue.

My truck has dual belts driving the water pump and Saginaw steering pump.

If I could find a *four* groove crank pulley with two pair of sheaves that had the same circumference what plane would I mount my alternator?