mod to alternator bracket. no more shaking! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mtdave2 · 09-05-2008, 10:10 PM

moive of running motor... no wobbles at all! (same video of us braking in the cam)

YouTube - motor running

just welded at piece of flat stock metal to the top at a T. trimmed, grinded,painted.. finaly, i hated that alternator shaking all the time.. smooth as glass now baby! weehoo

Sport/Truck · 09-05-2008, 10:12 PM

That looks like a good idea! Can I use your idea if mine shakes?
s/t

Jtrux · 09-05-2008, 10:12 PM

No vid...and what does smoke as glass mean???

EDIT:Well, it's fixed now...

mtdave2 · 09-05-2008, 10:20 PM

typeo .. smooth as glass

EdB · 09-05-2008, 10:26 PM

In the second picture, it appears that the two pulleys
are not in alignment. It you place some washers or
spacers behind the bracket, it will move it alternator
and bracket away from the head and line it up.

Could this be the difference between a long and short
water pump? I am not sure. It would be better to have
the two pulleys in line.

EdB

Jtrux · 09-05-2008, 10:27 PM

Quote:

Originally Posted by EdB

In the second picture, it appears that the two pulleys
are not in alignment. It you place some washers or
spacers behind the bracket, it will move it alternator
and bracket away from the head and line it up.

Could this be the difference between a long and short
water pump? I am not sure. It would be better to have
the two pulleys in line.

EdB

It's the angle of the pic, it's perfect if you're looking at it from the side directly.

68gmsee · 09-06-2008, 09:33 AM

Quote:

Originally Posted by Jtrux

It's the angle of the pic, it's perfect if you're looking at it from the side directly.

Hey Jtrux, I agree with EdB on this. If you look at the fan/water pump pulley you will see that the belt is pulling at a slight angle. I had the same thing when I converted my 250 to power steering. Took a few washer shims and tinkering but finally got it fairly straight.

I'd double check that just to make sure. What you will notice, if it's off, is that the belt will start squeeling at you prematurely.

70GMCer · 09-06-2008, 10:29 AM

Quote:

Originally Posted by 68gmsee

Hey Jtrux, I agree with EdB on this. If you look at the fan/water pump pulley you will see that the belt is pulling at a slight angle. I had the same thing when I converted my 250 to power steering. Took a few washer shims and tinkering but finally got it fairly straight.

I'd double check that just to make sure. What you will notice, if it's off, is that the belt will start squeeling at you prematurely.

I agree.......Here are 2 pictures of mine using the same brackets. Except the top adjustment bracket has 2 angle bends. No spacers were used.

Jtrux · 09-06-2008, 04:59 PM

Quote:

Originally Posted by 68gmsee

Hey Jtrux, I agree with EdB on this. If you look at the fan/water pump pulley you will see that the belt is pulling at a slight angle. I had the same thing when I converted my 250 to power steering. Took a few washer shims and tinkering but finally got it fairly straight.

I'd double check that just to make sure. What you will notice, if it's off, is that the belt will start squeeling at you prematurely.

Trust me, I was there, it's the angle of the camera.

**Classic Bowties** · 09-06-2008, 07:12 PM

Another easy fix/cure is to find an identicle upper bracket and double'em up, intalled back to back of one another.

**special-K** · 09-06-2008, 07:00 AM

This is a perfect mod.Great idea.You should have been working for GM.I`ve seen fatigued/broken lower brackets before,too.All the lateral support is in those since they are cast and rigid.

bad6772 · 09-06-2008, 10:52 AM

I mad my own a few years ago.....I will post pics....It was super easy to do....

09-05-2008, 10:12 PM	#2
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: mod to alternator bracket. no more shaking! That looks like a good idea! Can I use your idea if mine shakes? s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

09-05-2008, 10:12 PM	#3
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: mod to alternator bracket. no more shaking! No vid...and what does smoke as glass mean??? EDIT:Well, it's fixed now... __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!! Last edited by Jtrux; 09-05-2008 at 10:13 PM.

09-05-2008, 10:20 PM	#4
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,521	Re: mod to alternator bracket. no more shaking! typeo .. smooth as glass __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

09-05-2008, 10:26 PM	#5
EdB Registered User Join Date: Jan 2003 Location: Gulfport Ms Posts: 401	Re: mod to alternator bracket. no more shaking! In the second picture, it appears that the two pulleys are not in alignment. It you place some washers or spacers behind the bracket, it will move it alternator and bracket away from the head and line it up. Could this be the difference between a long and short water pump? I am not sure. It would be better to have the two pulleys in line. EdB

09-06-2008, 07:12 PM	#10
Classic Bowties Always on the hunt... Join Date: Sep 2006 Location: Portland, OR. Posts: 5,747	Re: mod to alternator bracket. no more shaking! Another easy fix/cure is to find an identicle upper bracket and double'em up, intalled back to back of one another.

09-06-2008, 07:00 AM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: mod to alternator bracket. no more shaking! This is a perfect mod.Great idea.You should have been working for GM.I`ve seen fatigued/broken lower brackets before,too.All the lateral support is in those since they are cast and rigid. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

09-06-2008, 10:52 AM	#12
bad6772 Official Site Guitar Shredder Join Date: May 2006 Location: Oz Posts: 3,955	Re: mod to alternator bracket. no more shaking! I mad my own a few years ago.....I will post pics....It was super easy to do....

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