4.3 pulley?

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Jun 17, 2009 | 05:31 PM

#11

a new level

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From: Lebanon,CT

Quote:

Originally Posted by oldred95

The cause of the death wobble of the pulley is your harmonic balancer going bad. The pulley itself isn't necessary bad, just the balancer that it bolts to is wobbling. My 95 is doing the same thing right now. I want to say the 4.3 liter CPI engine from like the old early 90s square body S 10 Blazers has a smaller diameter pulley then say a 350 and could be used as an underdrive pulley in that instance.

It's had a wobble from day one. Just now, it's getting worse. If it's the balancer GM's replacing the bitch!!!! Thanks for the info.

Jun 17, 2009 | 06:23 PM

#12

LowBlack99

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From: Southaven,MS

Quote:

Originally Posted by a new level

It's had a wobble from day one. Just now, it's getting worse. If it's the balancer GM's replacing the bitch!!!! Thanks for the info.

07 should carry a 100k warranty. Take it to the dealer, dont spend you money till you have to.

Jun 18, 2009 | 03:31 PM

#13

a new level

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From: Lebanon,CT

Quote:

Originally Posted by LowBlack99

07 should carry a 100k warranty. Take it to the dealer, dont spend you money till you have to.

That's my thought too. If it was the pulley I was going to say hell hell with the stock one and drop the money.

Jun 18, 2009 | 08:37 PM

#14

black06

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^^^ what drop are you running on the shortbed?

Jun 19, 2009 | 03:43 PM

#15

a new level

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Quote:

Originally Posted by black06

^^^ what drop are you running on the shortbed?

Hotchkis 4" leafs and belltech 3" coils. 275/45/20 tires. Not sure of the back space on those wheels in my sig but I'm now running a 20x9 wheel with 5.5" backspace now. I plan on tinkering a little more with the drop and post pics.

Apr 6, 2020 | 09:30 PM

#16

Rockrz

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From: Right here

So, who has a good quality harmonic balancer that would work on an '03 Chevy S-10 with 4.3L?

Should I just grab one from Rock Auto?

I have a little wobble in mine and I'm thinkin it may be the source of some engine vibration

Last edited by Rockrz; Apr 6, 2020 at 09:38 PM.

Oct 5, 2021 | 11:40 AM

#17

Fullpower

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The V6 4.3L all vibrate like that, due to imbalance of the two missing cylinders.

Oct 5, 2021 | 12:32 PM

#18

Rockrz

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Quote:

Originally Posted by Fullpower

The V6 4.3L all vibrate like that, due to imbalance of the two missing cylinders.

That has no bearing on it. The engine design works just fine with one less cylinder on each side as this still maintains the original balance.

I put an OE balancer on and it helped a lot.

Apparently the rubber in the original balancer was degrading causing it to not longer be true and putting a new one on is the thing to do for mine since it was a 2003 model with around 200k on the clock