hey
i measured my voltage and in idle it jumps between 7 .. 12 and 16.8 V
sometimes the GEN light also shows up

it is a normal generaor with transistor regulator with the one main + pin and the plug with the 2 wires.

so for me it seems thet the generator has to be replaced. but i read that in the car should also be a 2nd voltage regulator like pic below

h

where can i find this in my 73 delta 88 i checked everything but cant find it..

also when found it how can i check it.

thanks

alex

 

Please post a picture of your alternator.

The internally-regulated alternators have an electrical connector with pins like this: — —
The externally-regulated alternators have an electrical connector with pins like this: | |

If you have the former, then there is no external regulator.
If you have the latter, then the regulator will be bolted to the firewall in plain view.

The Chassis Service Manual covers alternator / regulator troubleshooting in great detail, but we can probably advise you once we know what you have.

- Eric

 

Pic is attached i think i have one with internal regulator.

Think a replacement with 100a should be fine.

 

This is the EXACT same issue i'm having with my 64 88 it seems. Random gen light and voltage fluctuates on my meter from low 12s to 14.5 or so. I always run my battery down. Sometimes the gen light stays off, sometimes it shuts off when I accelerate then gets brighter as I come down to idle. Sometimes it wont shut off period. I'm curious to see when your fix is.

 

Yes, you should be able to replace it with another internally-regulated alternator.
100A should be more than enough.

You can also get the internal components - all it may need is the regulator and brush assembly, which is much cheaper to ship.
The Standard Automotive Products AK6 is a complete kit of repair parts for $25 at RockAuto, and shipping would be a lot less than for a whole alternator.



- Eric

 

Weird looking engine setup.
I see a red wire unattached, you may wish to connect or at least insulate that.

And, the fuel line is a fire looking for a time to happen. Braided steel covering with a single worm drive hose clamp is not the worst way to contain pressurized fuel, but close to it.

Chances are you just need the small parts inside- the brushes mainly, and/or the regulator. There is a handy hole thru which you insert a paper clip type wire to hold back the brushes during assembly.

There is a D shaped hole on the alt'r back for troubleshooting- it bypasses the regulator and forces max voltage output I believe, to ensure that the mechanicals are OK. See the CSM for all the gory details.

 

This thread may give some pointers if replacing the internal regulator shown in the picture above.
https://classicoldsmobile.com/forums...lternator.html

 

My 63 D88 had a similar issue. I found out that the connector at the alternator wasn't fully seated. I also changed the external electro-mechanical regulator to a solid state regulator form Orileys for $25 around 3 years ago. Never a problem since.

 

So i got n new alternator thought that the 12si be fine after unpacking it i saw that the 12si with 6.6" mounting distance is a bit so small. Mine is about one inch larger....

Checked summit and a lot of pages but cant find out which is the right one.

Does anybody have an idea?

 

Just swinging from left field ... did you check all your ground wires to make sure you're not losing there? Also didn't see if you've confirmed that your battery isn't an issue. But ground wires are a frequently overlooked source of trouble.

 

Ground is in good condition and these voltage issues only happen when engine running so this all stands fot the alternator change

 

Repair and refurbish the original unit starts to look like a great option.

 

So i made some pics does any know what kind of alt this is. I checked at summit but found noting... Verry confused

 

2

 

3

 

I agree with Octania - it looks like the very standard, very generic internally regulated Delco alternator that we see all the time.
If you're having trouble finding one over there, then why not rebuild it for a lot fewer €s.

- Eric

 

Hey eric i even have trouble finding one in us at summit or jegs....

 

hey
so good news i found it on the remy page:

http://catalog.remyinc.com/Product/Details/20136

but i cant find any ressource to buy it...

 

looks like a 80 or 100 amp 27SI unit. I have them for sale, but shipping may high. Do you have the numbers on it? Is yours an 80 or 100 amp? The regulators are the same if you want to switch them.

 

I agree, Delta88 - Jegs and Summit do not seem to have them - they seem to only list 12si's and not 27si's.
However, RockAuto has them for $61, if you absolutely must buy a new one.

As noted above, Stellar can sell you one that is probably better than the Remy rebuilt that RockAuto has, and you can also just buy the rebuild kit for $25, with a whole lot less shipping, which is probably the best choice all around.

- Eric

 

You may want to open the alternator up and take a look inside. The 27SI type like you have often had a problem where the metal strap that connects the rectifier to the output post burns. Check it out.

 

hey
so my late reply but i replaced the alternator and everyting was fine no dimming of the lights ot a flashing GEN light
found a shop here in Germany who har one refurbshed 27SI one...
rare thing but i reccomend us speed shop in Hamburg
alex

 

Couldn't you get the regulator separately? If it produces the 16+ volts which you claim, there's nothing wrong with the alternator itself.
As previously mentioned, inspect all connections for looseness or corrosion, first

 

i found the parts but they cost if ship them to germany nerly 50% of a new alternator, so i now have a spare part and with my next order from summit ill get e replacement regulator and the spare part is fine

as i found out that the 27SI is very hart to get its good to have a spare part in tha basement :-)

 

On second thought, a faulty transistor or diode will also cause irregularities. These parts can be diagnosed with a simple instrument and obtained locally.
These larger components don't need to be shipped from the USA. This alternator has European applications, also:

http://www.factsmagazine.co.uk/news/...vy-duty-range/