alternator interchangeability

colony · Post by **colony** » August 26th, 2007, 1:45 pm

hi guys , ive got a probably unusal question to ask but , ill try anyway.

I have a spare alternator for a 1.8l SOHC protege engine
and wanted to know if i can install it onto a b6 DOHC 1994 engine,
bolt-on.

If anyone knows the answer id appreciate any pointers on that specific question
my mail: bodyshop_@hotmail.com

thanks

umcamara · Post by **umcamara** » August 26th, 2007, 8:04 pm

I know that the '90-'98 Protege DOHC BP's alternators are interchangeable. I'm going to take an educated guess and say that the SOHC alternator is as well.

What year Protege is the alt. from??

Limegreen mx-3 · Post by **Limegreen mx-3** » August 26th, 2007, 9:10 pm

boy ya should know that a 1.8 sohc is a 90-94 mazda protege DX etc other 2 letter model.. LOL

umcamara · Post by **umcamara** » August 27th, 2007, 12:55 am

Give me a break. I'm slowly learning everything I can about the MX3, and now you want me to be a Protege expert.

My small brain can only handle so much info before it starts writing over other info.

monty73741 · Post by **monty73741** » August 28th, 2007, 10:18 am

umcamar1 wrote:Give me a break. I'm slowly learning everything I can about the MX3, and now you want me to be a Protege expert.

My small brain can only handle so much info before it starts writing over other info.

you can always install a alternator from a v6 in you just have to change the pulleys

mazdamx3sohc · Post by **mazdamx3sohc** » September 5th, 2007, 10:22 pm

i cant friggen find any answers, would i have to change the pulleys if i have a sohc 4, and im buying a 1.8 v6 alternator? what do i need? part numbers? cuz im buying it tomorrow morning.

jaydog5678 · Post by **jaydog5678** » September 6th, 2007, 9:51 am

I believe you need to change pulleys. The SOHC 4 uses a v-belt pulley and if I'm not mistaken, the v-6 uses a ribbed belt.

monty73741 · Post by **monty73741** » September 6th, 2007, 10:43 am

jaydog5678 wrote:I believe you need to change pulleys. The SOHC 4 uses a v-belt pulley and if I'm not mistaken, the v-6 uses a ribbed belt.

check the FAQ FILE i think it is in there

mazdamx3sohc · Post by **mazdamx3sohc** » September 6th, 2007, 8:17 pm

did that all night, all there is, is "i THINK"

monty73741 · Post by **monty73741** » September 6th, 2007, 10:35 pm

mazdamx3sohc wrote:did that all night, all there is, is "i THINK"

wow glad u looked in the i4 faq cause its not therer

Swapping 60Amp (RS) for 90Amp (GS) alternator:

I notice a couple of weeks a go, on my friend Ron'sProtege that the engine RPM's would change each time the lights flashed when the emergency flashers were on. The stock charging system was having a hard time keeping up to the electrical requirments of the car. I gave Ron my spare 90Amp alternator to see if that would fix the problem of the engine speed dropping everytime he increased the electrical demand on the car. He had to swap pulleys from the old 60Amp to the 90Amp alternator because the "B" engine use a V-belt where the "K" engine use a serpentine belt. Also the Mounting bolts attach from the opposite side. Once the alternator is mechanically installed the wiring just plugs in. Now with the charging system having more capacity it uses less engine horsepower to operate all the electric systems

oh & thank yoda for figuring it out

kakarot135 · Post by **kakarot135** » September 6th, 2007, 10:36 pm

just swap the pulley from your current Alt to the new one. It takes about five minutes. The belts are different so you have to use your existing pulley. I did it about a year ago and it is still running strong....

colony · Post by **colony** » September 9th, 2007, 9:37 am

My question was for a friend and the part has been installed with success
She had to change the pulley but her actual one did not fit at all on the alt i brought her. I dunno wich pulley she took but it seems she found one (thanks to her mechanic) and now the car is repaired , thanks to me