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Alternator Type IV (4)
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porschpow
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PostPosted: Wed May 11, 2016 10:53 am    Post subject: Re: Alternator Type IV (4) Reply with quote

Any special tricks to put the upper bolt back in? Seems kinda tricky

I was thinking of saturating the lower bolt with PB blaster
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Wildthings
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PostPosted: Wed May 11, 2016 2:46 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

The upper one should have started life as a stud with a nut. If it still is you can just use a shallow socket and an extension to get the nut on. A bolt would be more difficult, but could be done the same way.
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BayCreamPuff
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PostPosted: Wed May 11, 2016 5:45 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

porschpow wrote:
Any special tricks to put the upper bolt back in? Seems kinda tricky


I'm able to start the top nut with my fingers.

To get the adjuster nut started I use one of those telescopic magnet pick up tools to hold it in place while I screw in the adjuster screw.
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porschpow
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PostPosted: Thu May 12, 2016 3:52 am    Post subject: Re: Alternator Type IV (4) Reply with quote

From what it looks to me, the upper bracket fastener looks to be a bolt, not a stud
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nathansnathan
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PostPosted: Thu May 12, 2016 8:45 am    Post subject: Re: Alternator Type IV (4) Reply with quote

Something I see a lot is the bracket the alternator pivots on the square hole gets all messed up and enlarged and then doesn't function to hold the bolt from turning. What I think happens is people aren't loosening that bolt; just pry it over to tension the belt and tighten the allen bolt back down. Or else they do loosen the bottom and just never bother to tighten it. I can only think that the alternator must be moving around down there to cause this wear which is on every other engine I've gone through. You can tighten/loosen that bottom bolt from below to avoid this. Whenever they're for sale people seem to photograph them so you can't even see the state of the square hole...

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Tcash
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PostPosted: Mon May 16, 2016 2:52 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

Type IV Alternator Cover template

http://www.thesamba.com/vw/forum/album_page.php?pic_id=913618

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Wildthings
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PostPosted: Mon May 16, 2016 11:25 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

Tcash wrote:
Type IV Alternator Cover template

http://www.thesamba.com/vw/forum/album_page.php?pic_id=913618

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I have made very good facsimiles of these parts by cutting up old gallon oil or antifreeze jugs.
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PostPosted: Mon May 23, 2016 2:29 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

Tcash wrote:
Type IV Alternator Cover template

http://www.thesamba.com/vw/forum/album_page.php?pic_id=913618

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That is for 75 or 76 through 79.
Here is the early version
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Anyone know what the other seal looks like? The one for between the alternator back and the tin? 021 903 637? Is it just a circle?
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Tcash
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PostPosted: Mon May 23, 2016 3:04 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

nathansnathan wrote:

Anyone know what the other seal looks like? The one for between the alternator back and the tin? 021 903 637? Is it just a circle?


021 903 637 #36
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Can't find a pic of it.
Good luck
Tcash

Please post a pic if you buy one.
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Wildthings
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PostPosted: Mon May 23, 2016 3:06 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

nathansnathan wrote:
Anyone know what the other seal looks like? The one for between the alternator back and the tin? 021 903 637? Is it just a circle?


Just a thin narrow paper gasket with three holes in it. If you glued a flat washer to the cover at each of the screw holes and then smeared silicone around the rim between the holes, let the silicone skim over for 30-45 minutes and then install the cover you would accomplish the same thing the gasket does.
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PostPosted: Mon May 23, 2016 3:12 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

does anyone have an NOS unused Bosch paper gasket that they want to sell. I can get a price on having some made if I have a true original to work from. Part is 021 903 637
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PostPosted: Mon May 23, 2016 3:17 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

Cool I can sort of picture it, the 3 holes and then just riding the thin lip where the tin touches the aluminum. I'm going to try to fab something up from gasket paper. Would be a long shot finding one I would think.
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Wildthings
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PostPosted: Mon May 23, 2016 3:19 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

SGKent wrote:
does anyone have an NOS unused Bosch paper gasket that they want to sell. I can get a price on having some made if I have a true original to work from.


I think I have a virtually new one somewhere, will keep an eye out for it. Going both thicker and wider would make for a more durable gasket, the original had little strength to it which is why they are all missing.
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PostPosted: Mon May 23, 2016 3:36 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

Thanks Mike - I just found a couple sources in Europe who indicate they have some. VW shows some in inventory as well although everyone stateside shows them as discontinued. I placed an order for 10. Will let everyone know when they come in. They will be $4.00 each plus postage when they get here. The dimensions VW gives are a bit thicker than the one that came out of my alternator back plate in pieces. The are 5.7" (sounds about right) x 5.31" (sounds about right) x .039" (sounds thicker than the original but maybe their system only goes down to 1mm or mine compressed with age, moisture, and heat)
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porschpow
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PostPosted: Wed May 25, 2016 8:32 am    Post subject: Re: Alternator Type IV (4) Reply with quote

For the alternator bracket, what size is the top bolt that the bracket bolts onto the engine? 10mm
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PostPosted: Wed May 25, 2016 11:43 am    Post subject: Re: Alternator Type IV (4) Reply with quote

porschpow wrote:
For the alternator bracket, what size is the top bolt that the bracket bolts onto the engine? 10mm


Wildthings wrote:
The upper one should have started life as a stud with a nut. If it still is you can just use a shallow socket and an extension to get the nut on. A bolt would be more difficult, but could be done the same way.


It's an 8mm stud, if I understand your question, the top of the alternator bracket..
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porschpow
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PostPosted: Wed May 25, 2016 11:52 am    Post subject: Re: Alternator Type IV (4) Reply with quote

Ok, weird, cause on some things, I read it was 13mm, and on other's it read as a 10mm nut
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PostPosted: Wed May 25, 2016 12:01 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

this one?

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williamM
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PostPosted: Wed May 25, 2016 1:22 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

When you find an allen like that, we used to just snug it up and tap the side of the allen wrench with a mallet, never dented the tin again.- belt nice and tight.
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Wildthings
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PostPosted: Wed May 25, 2016 2:44 pm    Post subject: Re: Alternator Type IV (4) Reply with quote

porschpow wrote:
Ok, weird, cause on some things, I read it was 13mm, and on other's it read as a 10mm nut


8 x 1.25mm, 13mm wrench size
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