Official EF Civic & CRX B-Series Alternator thread
I am not an expert, but rather a consolidator and organizer of information. If you see anything that is incorrect or that I missed, please let me know. I sourced all this info from many sites and put it in one place as a resource for H-T members.


All B-Series alternators share the same casing and will bolt up to a B series engine. The difference is in the OBD version of the Alternator and the plug used. All 88-95 B-series alternators are the same and will work for any B-series that is obd-0 or obd-1. Obd-2 alternators are different and require minor wiring modifications listed below.

Difference Between B-Series Alternators

OBD-0 & OBD-1 Alternators are interchangeable and share the same plug.
OBD-2 Alternators can be used but they use a different square plug which will require minor wiring changes to make it work


This pic shows the difference between the plugs





Here is a great writeup on the Alternator Wiring: http://ff-squad.com/wp/?p=425

Here is a quick guide on the alternator wiring pinout conversion.
OBD2 - - - - - - - - OBD1/0
black/yellow........black/yellow
white/blue............white/blue
white/yellow........white/green
white/red................blue

Alternator Belt for B-Series
Alternator belts are measured in 2 ways (how many channels the belt has and how long the belt is.) use 4-channel belts that are either 300cm or 305cm long. This is how the universal part#s work for the alternator belts.

Alternator Belt for EF with B-Series - #040300 or #040305

Differences Between D-Series Alternators
There are two different versions of the D-series alternator. The big difference between the two on a D-series motor is the pulley. 1988-1991 alternators use a three rib serpentine belt, while 1992-1995 alternators use a four rib belt (similar to ALL B-series). Also, the 1992+ alternators are somewhat bigger, and appear to be higher output units.

How to tell the difference between D-series & B-series alternators?
The easiest way to tell them apart is to look at the top mounting point on the alternator. The D-series alternators are threaded and B-series alternators are straight through.

Is it possible to use a D-series alternator on my B-series?
Yes. In most cases it is possible - but it will require a bit of creativity. It can be done but I would only recommend this as a short term solution until you can get a proper alternator.
Here is a link: http://www.homemadeturbo.com/showthread.php?t=56044

Alternator Amperage Outputs
(according to www.autopartswarehouse.com)

88-91 Civic / CRX - 60 amps
92-95 Civic - 70 amps
96-00 Civic - 75 amps

90-93 Integra - 65 amps
94-95 Integra - 90 amps
96-01 Integra - 95 amps
94-95 Del Sol Vtec - 70 amps
99-00 Civic Si - 90 amps

What is the Easiest way to remove Alternator from a B16 swapped EF Civic or CRX?

There are several options but #3 is the easiest IMO.

1. Remove driver’s side axle and remove through the bottom. This works well and I have used it personally but removing the axle is a bit of work.

2. Remove the Brake Master Cylinder. I have not tried this because of the brake lines etc. but this is one option to get it out.

3. The easiest way I have found is to unbolt the alternator, and then remove the upper alternator bracket. Then unbolt the fuel rail and without disconnecting it, just move it over, and wiggle the alternator out the top. It only fits one direction but it is not hard. It just worked for me and I was really happy I did not have to remove the axle

How To Remove Alternator:

Here is a before shot.



1. Disconnect Neg. battery cable.
2. Then unbolt (3) 10mm bolts holding fuel rail to manifold, and move to the side.
3. Unbolt both upper and lower bolts holding alternator in place and lower it down into hole.



4. Next remove (2) 14mm bolts holding in the upper mounting bracket, and remove it.



5. Now you should have plenty of space to get it out. It may only fit in one direction so look at this picture carefully because it shows the correct orientation.



6. Drop the new alternator down the hole. Replace upper mount. Reconnect fuel rail. Reconnect alternator and that’s it.


New alternator going in

 

weird, I always jiggly it out from the bottom.

 

yeah but you have to remove the driver's front wheel and axle first. This way was actually much easier.

 

why is it recommended to only use the b-series alt on a d-series temporarily? the stock D alt is pretty underpowered (dimming headlights when braking, or w/ an amp)

 

Im sure you will be fine electrically, even with 10 less amps (unless you have a really large load like amps etc.). I guess I mean the questionable mounting as I have never used this setup and cannot confirm it's reliability.

 

ah, alright.
some day, I'll upgrade my alt. news to me that obd0 and obd1 alts use the same plug, so thanks for that very very much.

 

I think he meant don't use the D series alt on the B series. B series alt on D would be fine cause its got a higher amp rating.

 

reading owns me.

 

great info!
does anyone have experience with high-amp alternators? i see some as high as 220 amps but i don't know how reliable they are.

 

Good start, but you need alot more info. Off the top of my head for d-series: OBD0 are 60amps, ODB1 and 2 are 70amps. I believe OBD0 and OBD1 use the same plug. Obd1 use a 4 rib belt (I believe Obd2 does also) and OBD0 is 3 ribs, pulleys can easily be swapped. It's been a while, but the last time I changed my alt. I believe I pulled it out through the bottom without removing anything but the alternator bolts.

 

I added some more info about the D-series alternators (check it out). I don't know much about the various D-series alternators but I would be happy to include additional info if you can explain the differences in more detail.

You say you get your alternator out the bottom without removing anything? Do you have a B-series swap or are you talking about removing a factory D-series Alternator form a stock vehicle with D-series engine?

 

I find it funny you posted this "official thread" after saying that obd1 alternators wouldnt work in a 88-91 b-swapped car.

 

I am not ashamed to admit I don't know everything. In fact over the last few days I have learned a lot about alternators and I have tried to make it easier for everyone to find the correct info.

 

how do you post pics on here?

 

Where can I find a obd1 alternator plug mines broke need one asap