Thread: 4BD1 Alternator

Originally Posted by JamesPM

Hey guys, this is my first post so I hope this hasn't been covered somewhere earlier...

The alternator on my 1987 4BD1 has packed up and my auto elec tells me he cant get another one!! I was wondering if this is true or can I get one off the net somewhere???

Any help would be greatly appreciated, regards JamesPM

G'day JamesPM and welcome to AULRO. I am guessing that your vehicle is a County with the Isuzu 4BD1 motor. It should have a 40A externally regulated alternator unless someone has changed it. Unlikely they are still made but if so price would be over the top I reckon. You could put an ad in the wanted section of the markets here, quite possible someone may have one lying around as a lot have upgraded to bigger amp internally regulated ones, otherwise get on the internet, EBAY USA have lots of suitable ones - 12V 70A is an ideal size but it must have the B section pulley or it won't fit your belt. Quite a lot of yank vehicles with this motor had the correct 12V 70A one. Do a search on here for "Isuzu alternator" and have a read through the threads, lots of info here. You also have to modify your bracket when you fit the 70A one.

I have one lying around if that suits.

Apparently the alternator from some Holden Rodeo or Jackeroo diesels can be fitted with minor mods.

I have the Isuzu truck motor, which came with a 24 Volt alternator. I replaced it with a 12V alternator for a Nissan Patrol or Narva. I had to cut about 3mm from the mounting bracket (a few minutes work to cut in situ with a hacksaw), and swap over the Vee belt pulley from the old 24V alternator.

The existing hoses fitted the vacuum pump on the new alternator.

James,
Here is a link on how I changed mine to a 70A unit that I got from the US.

http://www.aulro.com/afvb/1906211-post18.html

Thanks for all the help guys.

Vern, if you could send me some pictures of the alternator you have we might be able to do a deal. I'd much rather not have to modify to much if i can get away with it.

JamesPM

I got mine refurbished for $200 by an auto electrician, cheaper and easier than buying one from the US.