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Loose alternator bolt?
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Globespotter Premium Member
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PostPosted: Sat Jan 13, 2018 12:09 pm    Post subject: Loose alternator bolt? Reply with quote

Running my 77 Westy with Type 4 today - mid winter warm up, and I noticed the hex bolt holding on the alternator bracket was moving slightly back and forth. Is it supposed to do that, or is it supposed to be tight?
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1977 Westfalia - October 2015 - Current
1971 Super Beetle - May 2012 - Current
1979 Westfalia - 1986-1991
1971 Super Beetle - 1977-1980

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Wasted youth
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PostPosted: Sat Jan 13, 2018 2:27 pm    Post subject: Re: Loose alternator bolt? Reply with quote

The bolt that anchors to this nut? (Photo credit: hazetguy)... or the lower bolt that is underneath the engine? Neither should have any movement in my opinion.

Image may have been reduced in size. Click image to view fullscreen.

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Last edited by Wasted youth on Sat Jan 13, 2018 2:30 pm; edited 2 times in total
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rottenkid
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PostPosted: Sat Jan 13, 2018 2:28 pm    Post subject: Re: Loose alternator bolt? Reply with quote

It should be tight. I believe I used a carriage bolt when I put mine together. So that hexbolt should be tight.
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timvw7476
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PostPosted: Sat Jan 13, 2018 2:28 pm    Post subject: Re: Loose alternator bolt? Reply with quote

Everything is supposed to be tight, as in the slider bolt arrangement
& the carriage bolt, (it's indexed by the alternator tin, nut is near the sump
fill tube)
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rottenkid
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PostPosted: Sat Jan 13, 2018 2:29 pm    Post subject: Re: Loose alternator bolt? Reply with quote

You are referring to the lower bolt? And not the bolt that adjust the fan belt.
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Globespotter Premium Member
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PostPosted: Sat Jan 13, 2018 4:56 pm    Post subject: Re: Loose alternator bolt? Reply with quote

The bolt accessed in the engine compartment behind the oval plastic cover.
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1977 Westfalia - October 2015 - Current
1971 Super Beetle - May 2012 - Current
1979 Westfalia - 1986-1991
1971 Super Beetle - 1977-1980

Read the story about my Survivor Super Beetle: http://globespotter.com/survivor/

My 77 Westy M-Plate decoded: http://www.vw-mplate.com/mplate-30990.htm
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Amskeptic
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PostPosted: Sat Jan 13, 2018 5:24 pm    Post subject: Re: Loose alternator bolt? Reply with quote

Globespotter wrote:
The bolt accessed in the engine compartment behind the oval plastic cover.


That bolt should be secure. The nut that holds the bracket to the fan housing above that bolt is also supposed to be secure. The carriage bolt that holds the bottom of the alternator to the fan housing via a stamped metal bracket is supposed to be secure via 13mm nut accessible from underneath. The two 13mm bolts that hold that alternator pivot bracket to the fan housing need to be secure.

I am running into some real issues with these poor engines getting killed by cracks through all of the above, plus the alternator face tin, when they loosen or when people run an obviously imbalanced engine. These parts are drying up. We have to keep them happy.
Colin
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Globespotter Premium Member
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PostPosted: Sat Jan 13, 2018 5:28 pm    Post subject: Re: Loose alternator bolt? Reply with quote

Thanks Colin. I figured it should not be moving. Just noticed it when I was doing a mid winter start and warm up.
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1977 Westfalia - October 2015 - Current
1971 Super Beetle - May 2012 - Current
1979 Westfalia - 1986-1991
1971 Super Beetle - 1977-1980

Read the story about my Survivor Super Beetle: http://globespotter.com/survivor/

My 77 Westy M-Plate decoded: http://www.vw-mplate.com/mplate-30990.htm
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Wildthings
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PostPosted: Sun Jan 14, 2018 5:50 pm    Post subject: Re: Loose alternator bolt? Reply with quote

If the pivot bolt has been loose for long, there is a good chance the holes will have wallowed out by now and the alternator pulley no longer lining up well with the pulley on the crank.
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PostPosted: Mon Jan 15, 2018 12:15 am    Post subject: Re: Loose alternator bolt? Reply with quote

Wildthings wrote:
If the pivot bolt has been loose for long, there is a good chance the holes will have wallowed out by now and the alternator pulley no longer lining up well with the pulley on the crank.


Not an issue. Right now it's barely moving. Thanks.
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1977 Westfalia - October 2015 - Current
1971 Super Beetle - May 2012 - Current
1979 Westfalia - 1986-1991
1971 Super Beetle - 1977-1980

Read the story about my Survivor Super Beetle: http://globespotter.com/survivor/

My 77 Westy M-Plate decoded: http://www.vw-mplate.com/mplate-30990.htm
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PostPosted: Mon Jan 15, 2018 12:42 pm    Post subject: Re: Loose alternator bolt? Reply with quote

the bottom U-bracket cracks then the shroud wears where it wiggles and destroys the mount point.
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