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Jd56
Samba Member
Joined: May 11, 2019
Posts: 58
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 Posted: Sat Aug 10, 2019 2:51 pm Post subject: 1980 alternator |
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| Hey, curious if anyone knows what size and threads the bolt is for the bracket to keep the alternator belt tight. My belt keeps becoming loose and I have tracked it down to that bolt not staying tight. I think the po used a different bolt and it’s wrong. The bolt with thread in but doesn’t stay tight. I think the hole might need a tap but wanna know correct size before going that route. |
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Cobra88
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Joined: May 28, 2018
Posts: 82
Location: Ipswich, Suffolk, UK
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| Posted: Sat Aug 10, 2019 3:01 pm Post subject: Re: 1980 alternator |
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metric M8 x 1.25
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84 (85) model year Caravelle GL 1.9 DG Auto WBX Bronze Beige Metallic w Steel Sunroof |
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Jd56
Samba Member
Joined: May 11, 2019
Posts: 58
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| Posted: Sat Aug 10, 2019 3:17 pm Post subject: Re: 1980 alternator |
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| Ok so something is jacked with the hole then cause it will thread some way in then not tighten. Do you know the length also? |
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Ahwahnee
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Joined: June 05, 2010
Posts: 9800
Location: Mt Lemmon, AZ
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| Posted: Sat Aug 10, 2019 3:37 pm Post subject: Re: 1980 alternator |
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Are you using a lock washer & a flat washer?
As for length, I know that mine does not quite come thru to the other side:
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Jd56
Samba Member
Joined: May 11, 2019
Posts: 58
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| Posted: Sat Aug 10, 2019 4:55 pm Post subject: Re: 1980 alternator |
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| Mines different it’s down hidden behind the duct vents and goes into the block. Any type of washer the bolt doesn’t tighten I think the hole is kinda stripped, might need find a tap. |
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ALIKA T3
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Joined: July 30, 2009
Posts: 6351
Location: Honolulu,Hawaii and France
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jlrftype7
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Joined: July 24, 2018
Posts: 3577
Location: Chicago
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| Posted: Sun Aug 11, 2019 5:16 am Post subject: Re: 1980 alternator |
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Air Cooled, right?
Is the picture of the adjustment on the WBX engine Alternator shown here in the thread like yours, or not?
( I don’t own an Air Cooled, and my Bentley Manual isn’t handy right now)... 
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'69 Semi-Auto Stick Shift Beetle-gone
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jlrftype7
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Joined: July 24, 2018
Posts: 3577
Location: Chicago
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| Posted: Sun Aug 11, 2019 5:22 am Post subject: Re: 1980 alternator |
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https://images.app.goo.gl/bcQnAwjYE7EAdaEZ9
Okay, googled and linked, looks like the adjustment bolt tightens into the engine itself on the Type 4 Air Cooled set-up? Am I reading that right?
#8 bolt in the Air Cooled Alternator Diagram?
Could need a Timesert Bushing or Helicoil Repair if the hole in the the engine and is a blind hole at that.
I’m sure a ‘seasoned ‘ Air Cooled owner will chime in soon.... 
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'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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MarkWard
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Joined: February 09, 2005
Posts: 17124
Location: Retired South Florida
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| Posted: Sun Aug 11, 2019 7:52 am Post subject: Re: 1980 alternator |
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That part pictured is the blower shroud and is separate from the engine case. But the diagram does show the adjustment bolt threading into the shroud. The shroud is cast aluminum and yes a timesert would be the way to repair the threads.
Be sure once you tension the belt that you tighten the pivot bolt too. Time to remove the alternator and start exploring what you can do.
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jlrftype7
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Joined: July 24, 2018
Posts: 3577
Location: Chicago
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| Posted: Sun Aug 11, 2019 10:27 am Post subject: Re: 1980 alternator |
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| MarkWard wrote: |
That part pictured is the blower shroud and is separate from the engine case. But the diagram does show the adjustment bolt threading into the shroud. The shroud is cast aluminum and yes a timesert would be the way to repair the threads.
Be sure once you tension the belt that you tighten the pivot bolt too. Time to remove the alternator and start exploring what you can do. |
Thanks Mark..... 
_________________
'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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Jd56
Samba Member
Joined: May 11, 2019
Posts: 58
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| Posted: Sun Aug 11, 2019 12:19 pm Post subject: Re: 1980 alternator |
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| Yes aircooled blond hole into the block. That’s my fear is how deep does it go before I damage something else. Plus now that I found idea on right size maybe I’ll run a tap in, see if I clean threads up maybe it’ll get tight. I’ve tried shorter bolts, washers it doesn’t seem to get tight or hold. |
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MarkWard
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Joined: February 09, 2005
Posts: 17124
Location: Retired South Florida
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| Posted: Sun Aug 11, 2019 4:54 pm Post subject: Re: 1980 alternator |
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| Jd56 wrote: |
| Yes aircooled blond hole into the block. That’s my fear is how deep does it go before I damage something else. Plus now that I found idea on right size maybe I’ll run a tap in, see if I clean threads up maybe it’ll get tight. I’ve tried shorter bolts, washers it doesn’t seem to get tight or hold. |
Did you understand my above post? It’s not the block.
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Jd56
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Joined: May 11, 2019
Posts: 58
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| Posted: Sun Aug 11, 2019 6:58 pm Post subject: Re: 1980 alternator |
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| I forgot didn’t notice. So it threads into the shroud what would happen if you drill to far into it? |
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MarkWard
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Joined: February 09, 2005
Posts: 17124
Location: Retired South Florida
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| Posted: Mon Aug 12, 2019 6:33 am Post subject: Re: 1980 alternator |
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It’s hollow for the most part. I can’t see that you’d damage anything worse than it is.
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jlrftype7
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Joined: July 24, 2018
Posts: 3577
Location: Chicago
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| Posted: Mon Aug 12, 2019 7:27 am Post subject: Re: 1980 alternator |
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Take a strong , tight / narrow beam flashlight and mirror and look as far down the hole as you can see. If the metal is gone with regards to remaining threads, you’re probably done and time for repair.
If you see lots of threads, try the tap route
Using the tap or a re-threading tap( these often have hex drive on them so they are easier to work with a wrench or socket in a tight space), feel the resistance AND how much wobble the tap shows coming out of the hole.
If it feels really loose and you can move the tap up and down a fair amount, you aren’t going to be happy- too much loss has occurred.
Use the longest bolt that will safely get the job done since threads closer to the surface of the part you’re bolting into will be normally the most worn out.
That’s why a shorter bolt doesn’t usually work with worn threads.
If you gain nothing with rethreading and a new bolt..... time for a thread repair
Here is a common rethreading tap, they’re short, wont reach that deep into a hole due to the hex drive on the end, unlike a regular tap, but, easier to work with using ordinary mechanic tools since the hex drive is normally 7/16” or 1/2” and everyone has a socket or wrench in that size
https://www.google.com/search?q=rethreading+tap&am...GiC5AfppJM
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'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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