Alternator Bracket Too Short - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TugOwar · 06-04-2006, 10:17 PM

In between periods of being frusterated by the 700r4 install

I'm trying to straighten out a few others things that need attending to.

One is the alternator bracket. My 68 has the factory bracket installed, as pictured below (thanks Luv).

My problem is with the adjustment part of it. I forget the belt lengths at the moment but one length is too short and the alt hits the valve cover. 1/2" longer and the bracket is too short to tighten the belt.

I picked up an after market bracket (the arm part) at autozone that was longer but it had the wrong curvature. I maybe could have ground some off the lower edge of it and made it work but opted to return it, get my 12 bucks back and look for a better option.

Since this is factory bracketry I know some one else has run into this before. What did you do to correct it?

LUV2XCLR8 · 06-04-2006, 10:35 PM

YOU STOLE MY PIC

The one attached is the factory one, the other
is one I got as part of a parts deal, if it is curved the same, will have to
look at it tomorrow, I can give you the dimensions so you can match up.

TugOwar · 06-04-2006, 10:50 PM

uhh, stole? naw man. See, its still there, right where you left it!

Any help/advice is appreciated.

matthufham · 06-04-2006, 11:16 PM

i had this problem, i had to extend the bracket about 3 inches with some creative angle iron and bolting it to the manifold. this is a chrome version with the same angles and lengths as the original.

i don't know if these pics show it, but it's the best i got since my truck's in paint

Blazer1970 · 06-05-2006, 06:51 AM

'72 trucks have a longer curved adjustment arm that can be used with your brackets to solve your problem.

**truckdude239** · 06-05-2006, 07:03 AM

my friend 67 was like that i used the shorter belt and once in the pully was able to adjust it

**PICKMUP** · 06-05-2006, 12:12 PM

You have to run the later (72?) arm when you use tall valve covers. I save them just for that reason...so go to the longer arm or cut and weld and grind in an extension piece.
Yes, you will have to run a longer belt.

TugOwar · 06-05-2006, 01:39 PM

Ok, so I need to dig up a 72 (Or later?) arm and all is well. 72 is gonna be hard to find.

Oddly these aren't tall valve covers. They're old Erson chrome covers. Were on the truck when I got it. Never been cared for so they're more rust that chrome, but not beat up. Wish I knew a way to strip the chrome off so I could paint them. But thats beside the point.

Thanks for the very good info guys, looks like a boneyard trip is in order.

matthufham · 06-05-2006, 01:41 PM

my 72 arm is the same as the chrome one i have, it's still short. i had to extend it 3 inches with angle iron as said earlier.

TugOwar · 06-05-2006, 02:03 PM

So I suppose another alternative would be to move the alt to the passenger side? I'd need the brackets of off... 73-87?

matthufham · 06-05-2006, 02:24 PM

well, you're aiming at a short water pump style. the later trucks use a long water pump style.

LUV2XCLR8 · 06-05-2006, 03:38 PM

IIRC Passenger side mounted alts are long h20 pump only, but I
could be wrong, let me know if you can't find one, it's a extra

06-04-2006, 10:17 PM	#1
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Alternator Bracket Too Short In between periods of being frusterated by the 700r4 install I'm trying to straighten out a few others things that need attending to. One is the alternator bracket. My 68 has the factory bracket installed, as pictured below (thanks Luv). My problem is with the adjustment part of it. I forget the belt lengths at the moment but one length is too short and the alt hits the valve cover. 1/2" longer and the bracket is too short to tighten the belt. I picked up an after market bracket (the arm part) at autozone that was longer but it had the wrong curvature. I maybe could have ground some off the lower edge of it and made it work but opted to return it, get my 12 bucks back and look for a better option. Since this is factory bracketry I know some one else has run into this before. What did you do to correct it? Attached Images

06-04-2006, 10:35 PM	#2
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,475	Re: Alternator Bracket Too Short YOU STOLE MY PIC The one attached is the factory one, the other is one I got as part of a parts deal, if it is curved the same, will have to look at it tomorrow, I can give you the dimensions so you can match up. __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Big Piggy: "Goliath" 07 Kodiak C4500 Lil Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

06-04-2006, 10:50 PM	#3
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: Alternator Bracket Too Short uhh, stole? naw man. See, its still there, right where you left it! Any help/advice is appreciated.

06-04-2006, 11:16 PM	#4
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: Alternator Bracket Too Short i had this problem, i had to extend the bracket about 3 inches with some creative angle iron and bolting it to the manifold. this is a chrome version with the same angles and lengths as the original. i don't know if these pics show it, but it's the best i got since my truck's in paint Attached Images

06-05-2006, 06:51 AM	#5
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Alternator Bracket Too Short '72 trucks have a longer curved adjustment arm that can be used with your brackets to solve your problem. __________________ Tim

06-05-2006, 07:03 AM	#6
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,233	Re: Alternator Bracket Too Short my friend 67 was like that i used the shorter belt and once in the pully was able to adjust it __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

06-05-2006, 12:12 PM	#7
PICKMUP "Trucks with Class" Join Date: Jul 2000 Location: OLYMPIA, WA, USA Posts: 8,126	Re: Alternator Bracket Too Short You have to run the later (72?) arm when you use tall valve covers. I save them just for that reason...so go to the longer arm or cut and weld and grind in an extension piece. Yes, you will have to run a longer belt.

06-05-2006, 01:39 PM	#8
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: Alternator Bracket Too Short Ok, so I need to dig up a 72 (Or later?) arm and all is well. 72 is gonna be hard to find. Oddly these aren't tall valve covers. They're old Erson chrome covers. Were on the truck when I got it. Never been cared for so they're more rust that chrome, but not beat up. Wish I knew a way to strip the chrome off so I could paint them. But thats beside the point. Thanks for the very good info guys, looks like a boneyard trip is in order.

06-05-2006, 01:41 PM	#9
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: Alternator Bracket Too Short my 72 arm is the same as the chrome one i have, it's still short. i had to extend it 3 inches with angle iron as said earlier.

06-05-2006, 02:03 PM	#10
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: Alternator Bracket Too Short So I suppose another alternative would be to move the alt to the passenger side? I'd need the brackets of off... 73-87?

06-05-2006, 02:24 PM	#11
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: Alternator Bracket Too Short well, you're aiming at a short water pump style. the later trucks use a long water pump style.

06-05-2006, 03:38 PM	#12
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,475	Re: Alternator Bracket Too Short IIRC Passenger side mounted alts are long h20 pump only, but I could be wrong, let me know if you can't find one, it's a extra __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Big Piggy: "Goliath" 07 Kodiak C4500 Lil Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T



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