5 1/2" alternator diameter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cliffsta · 04-08-2006, 05:24 PM

My bracket for my alternator is 5 1/2 inches, I need a higher amp alternator, but they are 160 bucks from AutoZone. Any other viable solutions? Or do I need to find a different bracket? What about how the bracket attaches to the water pump?

beaterC10 · 04-08-2006, 09:15 PM

What is the problem with the bracket?

You might try pricing an alternator for an 87 with A/C. Mine has a 94 amp alternator.

cliffsta · 04-08-2006, 09:17 PM

the bracket isn't big enough width wise... the alternator is wider and longer.

we're gonna try a local alternator shop, they rebuild them to higher amperage, and they are a reputable place.

piecesparts · 04-09-2006, 09:04 AM

I guess we don't quite understand the question. What is the problem with the bracket. The brackets on all of the trucks I have seen are basically the same, and the alternators are the same size in most cases (whether or not they are 80 amp or 140 amp). Unless you have happened onto a monster aftermarket alternator of sopme kind.

cliffsta · 04-09-2006, 11:24 AM

there are two size alternators that came on these trucks, one with a 5 1/2 case diameter, and another with a 6 3/8ths ish diameter. The bigger one is also wider between the two bolts by over an inch. The bigger one cannot physically bolt in b/c the bracket is too narrow for the bolt holes on teh bigger one. Autozone lists a 100-amp alternator that is the smaller size, but it is over 200 dollars.

We're just gonna throw the old crappy one back on today so I am not vehicle-less for the week until I can find something.

04-08-2006, 05:24 PM	#1
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	5 1/2" alternator diameter My bracket for my alternator is 5 1/2 inches, I need a higher amp alternator, but they are 160 bucks from AutoZone. Any other viable solutions? Or do I need to find a different bracket? What about how the bracket attaches to the water pump? __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

04-08-2006, 09:15 PM	#2
beaterC10 Senior Member Join Date: Jul 2003 Location: Indianapolis, IN Posts: 1,277	Re: 5 1/2" alternator diameter What is the problem with the bracket? You might try pricing an alternator for an 87 with A/C. Mine has a 94 amp alternator.

04-08-2006, 09:17 PM	#3
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	Re: 5 1/2" alternator diameter the bracket isn't big enough width wise... the alternator is wider and longer. we're gonna try a local alternator shop, they rebuild them to higher amperage, and they are a reputable place. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

04-09-2006, 09:04 AM	#4
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: 5 1/2" alternator diameter I guess we don't quite understand the question. What is the problem with the bracket. The brackets on all of the trucks I have seen are basically the same, and the alternators are the same size in most cases (whether or not they are 80 amp or 140 amp). Unless you have happened onto a monster aftermarket alternator of sopme kind.

04-09-2006, 11:24 AM	#5
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	Re: 5 1/2" alternator diameter there are two size alternators that came on these trucks, one with a 5 1/2 case diameter, and another with a 6 3/8ths ish diameter. The bigger one is also wider between the two bolts by over an inch. The bigger one cannot physically bolt in b/c the bracket is too narrow for the bolt holes on teh bigger one. Autozone lists a 100-amp alternator that is the smaller size, but it is over 200 dollars. We're just gonna throw the old crappy one back on today so I am not vehicle-less for the week until I can find something. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord



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