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> School me on 6 cylinder alternators
tornik550
post Sep 12 2016, 06:07 PM
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I am in the market for a new alternator for my 2.7l. I currently have a SEV Marchal. It is not working. The fan housing that I have is from a 2.2e. Any recommendations of an alternator that I can install? I know very little about alternators on 6 cylinders. Any advice is much appreciated. Cheap and reliable is a major plus.
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PanelBilly
post Sep 12 2016, 06:11 PM
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Have the one you own rebuilt by someone who knows what they're doing. Not just fixed, but reconditioned. New brushes and such. Saves $
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PanelBilly
post Sep 12 2016, 06:12 PM
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double post?
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tornik550
post Sep 12 2016, 06:14 PM
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I am planning on getting mine rebuilt so I can keep it as a spare however I was wanting to get another.
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mepstein
post Sep 12 2016, 06:30 PM
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A rebuild should take a couple days. In the meantime, look for a spare to store away.
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raynekat
post Sep 12 2016, 06:43 PM
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Agree.
Just got my back from being reconditioned/rebuilt/restored.
Looks like brand new.
Guy replaced diodes, brushes, bearings, seals, etc.
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tornik550
post Sep 12 2016, 06:48 PM
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Who does the rebuilds?

Also- can the alternator just be plugged into the relay board just like with the /4 engines? Or am I simplifying things too much.
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mepstein
post Sep 12 2016, 07:41 PM
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Our local battery shop does our starters and alternators. 2 day turnaround, $100-125 on average.
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ClayPerrine
post Sep 12 2016, 07:47 PM
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The early 911 alternators were externally regulated, just like the 914-4 alternator. You can use a stock relay board and the regulator mounted there, but you have to have the correct engine harness to hook up the regulator.

A better way is to buy a 911 SC or Carrera alternator. It has an internal regulator, and it is a direct bolt on to your engine. The only wires you need are the big heavy red one from the starter, and the blue one that hooks up to the alternator light.

And yes, you can change a six alternator with the engine in the car. There is an article on this site that will explain how.
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mskala
post Sep 12 2016, 07:50 PM
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If you're really going to get another one, I got one from RetroAutomotiveProducts
that's been fine for the last 5 years. They are 1 day shipping away from me so I
may be biased. They have a store on Ebay but also a real phone number.

RETRO-AUTOMOTIVE-PRODUCTS
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GeorgeRud
post Sep 12 2016, 07:52 PM
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Though the internally regulated alternators may be simpler, I do like the ease of swapping out the externally regulated ones. Often, it is the regulator that goes south, so much easier to swap on the board rather than fighting to take the alternator out on a -6.
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Mark Henry
post Sep 12 2016, 11:08 PM
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Many of the guys over on the bird say the externally regulated alternators have less issues than the internally regulated.
They figure the heat of the engine cooks the regulator.

Most auto electric shops do just as good a job as the factory, you have to know your poop, but there's not much to them.
I've replaced bearings in the T1 alternators, often that's all that is wrong with them. I replaced the bearings in the alternator of my bug.
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sixnotfour
post Sep 13 2016, 02:35 AM
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if you have an early fan housing the internal reg. alt will have pulley alignment issues. the later fan housings are machihed deeper to allow for the longer length..
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Steve
post Sep 13 2016, 07:05 AM
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I've been running an internally regulated alternator since 86 with no problems. I dumped the relay board and wired everything direct. My first motor back in 86 was a 2.7 with webers. After it died in 2000, due to pulled head studs, I swapped it with a 3.2. Unless your a concours weenie, I would dump the relay / regulator board. Besides the regulator the board powers the fuel pump, heater fan and rear window defogger.
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Mark Henry
post Sep 13 2016, 07:19 AM
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QUOTE(sixnotfour @ Sep 13 2016, 04:35 AM) *

if you have an early fan housing the internal reg. alt will have pulley alignment issues. the later fan housings are machihed deeper to allow for the longer length..

(IMG:style_emoticons/default/agree.gif) Very important!
Not a minor misalignment, it's close to 3/4" (IMG:style_emoticons/default/huh.gif)
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EdwardBlume
post Sep 13 2016, 07:20 AM
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Does the same apply to a 2.4? My alt is shot and I've been putting off pulling the motor. I've also heard about the internal vs external regulator. Is it the same for a 2.4?
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wndsrfr
post Sep 13 2016, 08:26 AM
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QUOTE(Mark Henry @ Sep 13 2016, 05:19 AM) *

QUOTE(sixnotfour @ Sep 13 2016, 04:35 AM) *

if you have an early fan housing the internal reg. alt will have pulley alignment issues. the later fan housings are machihed deeper to allow for the longer length..

(IMG:style_emoticons/default/agree.gif) Very important!
Not a minor misalignment, it's close to 3/4" (IMG:style_emoticons/default/huh.gif)

(IMG:style_emoticons/default/agree.gif) X2,
I had a bad time with the alt on my 2.7...housing on the new one I bought wasn't right at all...best to get the one you have refurbed....
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tornik550
post Sep 13 2016, 08:26 AM
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So is there an internal regulator alt that wont have the alignment issues with the early fan housings?
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Steve
post Sep 13 2016, 08:41 AM
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I would also post this question on the bird 911 technical forum.
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JmuRiz
post Sep 13 2016, 09:28 AM
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Good info to know...posting here to keep tabs on the topic
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