Low Mount Alternator Bracket - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Legolas894 · 11-22-2009, 11:21 AM

The alternator bolt snapped off in the head while driving. Lucky for me, there was enough of a shard on the bolt that I could turn it out (very slowly) by hand.
I guess I have to address this issue, the PO had a strange set up with parts that could not have been stock. See first picture.

All I seem to find as a replacement are the chrome lower mount SBC, SWP brackets. It doesn't look like you have much adjustment with these. Is anyone using them? What did the stock brackets look like?

Thanks

roger0080 · 11-22-2009, 02:48 PM

Correct me if I'm wrong but you don't have the 2 holes in the front of the head for the stock alternator bracket, guess that's why you have the funky setup you have.

Andy4639 · 11-22-2009, 03:40 PM

That's what I see also no bolt holes in the head to do it with.

Legolas894 · 11-22-2009, 04:04 PM

Yes-All I've got are the two bolt holes below the water pump on the driver's side. Still wondering if the stock position was low (like I have) or some other bracket that attached to the intake manifold.

**Boog** · 11-22-2009, 04:33 PM

That low mount concoction was not the original setup. I believe the correct alternator mount was a bracket bolted to the exhaust manifold on the pre 69 engines. It wasn't until 69 or so that the heads came with accessory holes in them.

vectorit · 11-22-2009, 04:51 PM

A long time ago I ran that chrome lower bracket for the alternator.
It was more trouble than it was worth so I pitched it, and went back to the OEM style bracketry.

Legolas894 · 11-22-2009, 05:42 PM

Quote:

Originally Posted by vectorit

A long time ago I ran that chrome lower bracket for the alternator.
It was more trouble than it was worth so I pitched it, and went back to the OEM style bracketry.

That's what I want but I can't find a picture of the OEM style. Does it look like this on on ebay?

http://cgi.ebay.ca/ws/eBayISAPI.dll?...2#ht_500wt_975

william-theglassman · 11-22-2009, 05:47 PM

go to a salvage yard. get a alt. bracket from a older buick v6 . it will bolt up to the 2 holes on the block in front of the fuel pump.you will have to come up with a top adj. bracket piece.

vectorit · 11-22-2009, 05:53 PM

I think you may be in for some hassle... Since it looks like your driver side exhaust manifold doesn't have a mounting boss on it.

Here is how mine is set up.
Notice the shape of the upper adjuster braket, this one is the one the worked best for me. I went through many ebay purchases of different style upper brakets, only to find they didn't have the best arc to adjust the alternater with my lower braket set up.

Legolas894 · 11-22-2009, 09:09 PM

Vectorit-Thanks for the beautiful pix. I think I have a cannibalized version of your set up. The adjusting hockey stick looks the same. Also, the s-shaped bracket that I have looks similar to the one on your exhaust manifold. Are two holes on the exhaust manifold required for your setup (alternator pivot goes all the way through or just into the bracket)?
I wonder if there is a modification.

WHY IS THIS SO COMPLICATED!!!!
I'm missing out driving my truck on these great days. Winter is coming soon.

Thanks again for the pictures. I'd still like to see anyone else's setup especially on a '67 283.

Legolas894 · 11-23-2009, 11:27 PM

Any other pics of bracket options?

vectorit · 11-24-2009, 12:15 AM

I'd see about getting a ram exhaust manifold for the driver side with the alternator mounting boss, then you could set up the brackets like how mine are. The lower you can get anywhere, and the upper you may have to search a little bit. But at least you will be on the right track, and be back on the road more reliably sooner.

Legolas894 · 11-24-2009, 10:24 PM

Thanks Vectorit!

11-22-2009, 11:21 AM	#1
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Low Mount Alternator Bracket The alternator bolt snapped off in the head while driving. Lucky for me, there was enough of a shard on the bolt that I could turn it out (very slowly) by hand. I guess I have to address this issue, the PO had a strange set up with parts that could not have been stock. See first picture. All I seem to find as a replacement are the chrome lower mount SBC, SWP brackets. It doesn't look like you have much adjustment with these. Is anyone using them? What did the stock brackets look like? Thanks Attached Images __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]

11-22-2009, 02:48 PM	#2
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: Low Mount Alternator Bracket Correct me if I'm wrong but you don't have the 2 holes in the front of the head for the stock alternator bracket, guess that's why you have the funky setup you have. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

11-22-2009, 03:40 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Low Mount Alternator Bracket That's what I see also no bolt holes in the head to do it with. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

11-22-2009, 04:04 PM	#4
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Re: Low Mount Alternator Bracket Yes-All I've got are the two bolt holes below the water pump on the driver's side. Still wondering if the stock position was low (like I have) or some other bracket that attached to the intake manifold. __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]

11-22-2009, 04:33 PM	#5
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,109	Re: Low Mount Alternator Bracket That low mount concoction was not the original setup. I believe the correct alternator mount was a bracket bolted to the exhaust manifold on the pre 69 engines. It wasn't until 69 or so that the heads came with accessory holes in them. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

11-22-2009, 04:51 PM	#6
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: Low Mount Alternator Bracket A long time ago I ran that chrome lower bracket for the alternator. It was more trouble than it was worth so I pitched it, and went back to the OEM style bracketry. __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU

11-22-2009, 05:47 PM	#8
william-theglassman Registered User Join Date: Jun 2009 Location: lake charles louisiana Posts: 94	Re: Low Mount Alternator Bracket go to a salvage yard. get a alt. bracket from a older buick v6 . it will bolt up to the 2 holes on the block in front of the fuel pump.you will have to come up with a top adj. bracket piece.

11-22-2009, 05:53 PM	#9
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: Low Mount Alternator Bracket I think you may be in for some hassle... Since it looks like your driver side exhaust manifold doesn't have a mounting boss on it. Here is how mine is set up. Notice the shape of the upper adjuster braket, this one is the one the worked best for me. I went through many ebay purchases of different style upper brakets, only to find they didn't have the best arc to adjust the alternater with my lower braket set up. Attached Images __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU

11-22-2009, 09:09 PM	#10
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Re: Low Mount Alternator Bracket Vectorit-Thanks for the beautiful pix. I think I have a cannibalized version of your set up. The adjusting hockey stick looks the same. Also, the s-shaped bracket that I have looks similar to the one on your exhaust manifold. Are two holes on the exhaust manifold required for your setup (alternator pivot goes all the way through or just into the bracket)? I wonder if there is a modification. WHY IS THIS SO COMPLICATED!!!! I'm missing out driving my truck on these great days. Winter is coming soon. Thanks again for the pictures. I'd still like to see anyone else's setup especially on a '67 283. __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]

11-23-2009, 11:27 PM	#11
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Re: Low Mount Alternator Bracket Any other pics of bracket options? __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]

11-24-2009, 12:15 AM	#12
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: Low Mount Alternator Bracket I'd see about getting a ram exhaust manifold for the driver side with the alternator mounting boss, then you could set up the brackets like how mine are. The lower you can get anywhere, and the upper you may have to search a little bit. But at least you will be on the right track, and be back on the road more reliably sooner. __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU

11-24-2009, 10:24 PM	#13
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Re: Low Mount Alternator Bracket Thanks Vectorit! __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]



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