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06-12-2016, 05:58 PM
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#1 |
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70+ ( Old Skool Club )
 
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,161
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Broken Alternator Bracket
A friend was looking at my truck and noticed that my alternator bracket was broke. He said he has seen quite of few of our trucks with the bracket broken in the same place. My truck is a 72 350/350 with everything stock. Has anyone else had this happen to their truck?
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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06-12-2016, 07:06 PM
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#2 |
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Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: Broken Alternator Bracket
Not me, but that will weld up nice...
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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06-12-2016, 07:09 PM
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#3 | |
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70+ ( Old Skool Club )
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,161
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Re: Broken Alternator Bracket
Quote:
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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06-12-2016, 07:33 PM
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#4 |
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Registered User
Join Date: Jun 2015
Location: @
Posts: 890
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Re: Broken Alternator Bracket
I have seen a few of these break but usually down by the head at the bolt on higher horse engines . they weld back together fine
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06-12-2016, 08:56 PM
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#5 |
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Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Broken Alternator Bracket
If you leave the long bottom bolt too loose,the vibration will break the top bracket.
Mike. 
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06-12-2016, 09:22 PM
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#6 |
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Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,530
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Re: Broken Alternator Bracket
corvette vendors sell replacements
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06-12-2016, 11:31 PM
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#7 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Broken Alternator Bracket
weld it..
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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06-13-2016, 04:43 AM
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#8 |
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Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,530
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Re: Broken Alternator Bracket
welding it and it will crack again. they cracked often as did other factory alternator brackets. the solution then and now is to double them up. and keep some spars handy.
from the factory they are painted orange. |
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06-14-2016, 12:30 PM
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#9 |
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Registered User
Join Date: Nov 2013
Location: Comox BC
Posts: 337
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Re: Broken Alternator Bracket
I agree on doubling them up.
Was told that from the factory that the 283's came that way as they liked to crack. Cal. |
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06-14-2016, 06:53 PM
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#10 |
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70+ ( Old Skool Club )
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,161
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Re: Broken Alternator Bracket
Thanks for all the info and comments. Today I took a pic of the bolt that is holding the bracket to the alternator. The way this bolt is sitting to me it doesn't look like something the factory would do. If someone has an original 350/350 with a/t truck can they check the bolt and see if my assumptions are correct. From the info I have got from this thread I think if its the wrong bolt in there that would explain the cracked bracket.
__________________
1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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06-14-2016, 08:55 PM
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#11 |
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Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,595
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Re: Broken Alternator Bracket
Oh yeah. That's it. I always used a flanged bolt. Much fatter with a sort of built in loc-washer deal. Washers would always seem to come loose so I wouldn't use them.
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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06-14-2016, 10:19 PM
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#12 |
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70+ ( Old Skool Club )
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,161
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Re: Broken Alternator Bracket
I bet that is the problem and why mine cracked. looking closer I se the bolt is on the outside and the washer between the bracket and alternator. Looks like a simple fix, proper bolt and a new or good used bracket and with my usage it will last the life of the truck.
My plan is within the next 2/3 years to take my truck on the Power Tour. I've been watching some YouTube videos of the Power Tour and I guess with 5000+ classic vehicles driving a lot of miles in extreme heat etc. there are lots of breakdowns. Something like this broken alternator bracket not noticed and looked after properly could cause a breakdown on a long trip like the Power Tour.
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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06-14-2016, 10:23 PM
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#13 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,978
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Re: Broken Alternator Bracket
It's nothing new... they almost ALL crack over time. I haven't had one of these trucks yet that hasn't either came with a cracked bracket, or they crack later on. It's just kind of a poor design with a lot of force being placed on that long skinny bracket.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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06-14-2016, 11:05 PM
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#14 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 20,131
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Re: Broken Alternator Bracket
I have one of those (somewhere) that is doubled up and has a metal thingy that holds them together. I was thinking it was some sort of factory fix of a bad design. If I ever run across it Ill post a picture.
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