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Harmonic balancer ?

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Old Oct 7, 2015 | 05:14 PM
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Default Harmonic balancer ?

I replaced my balancer last year after I heard a metal to metal rubbing noise. Found that the balancer had separated at the rubber inner ring. I just put the spacers I got to push my fan forward into the shroud. Noticed the sound again. So I put one of the spacers behind the water pump pulley instead of in front. Noise gone but the car started to hesitate upon acceleration. My ? Is could the balancer be failing again and causing the car to jump time? Thanks Shemp
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Old Oct 7, 2015 | 05:23 PM
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how old is your timing gear?
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Old Oct 7, 2015 | 05:27 PM
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If memory serves, that water pump spacer goes between the water pump and the belt pulley to act as a reinforcement to the pulley center.

Look at the water pump pulley and make sure it's not cracked around the bolt holes.

I have no idea why your car hesitates.
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Old Oct 7, 2015 | 05:36 PM
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Originally Posted by MikeM
If memory serves, that water pump spacer goes between the water pump and the belt pulley to act as a reinforcement to the pulley center.

not to shabby for a old man like your self

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Old Oct 7, 2015 | 07:02 PM
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Originally Posted by MikeM
If memory serves, that water pump spacer goes between the water pump and the belt pulley to act as a reinforcement to the pulley center.

Look at the water pump pulley and make sure it's not cracked around the bolt holes.

I have no idea why your car hesitates.
I thought it goes in front of the water pump pulley. If you put it behind it pushes the pulley forward and misaligns the belt. My problem is I feel that the balancer has come apart again. When I feel the front side of the balancer I feel the outer ring of the balancer has moved forward from the rubber center. That was what was causing the noise, the crankshaft pulley had moved forward and is touching the water pump pulley. I just wondered if the outer part of the balancer had spun a little bit if that would cause a timing issue. I know it would make it tough to time the car due to the mark moving but would it effect the timing already set on the car. It ran fine 2 weeks ago.
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Old Oct 7, 2015 | 07:19 PM
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Originally Posted by shemp

I thought it goes in front of the water pump pulley. If you put it behind it pushes the pulley forward and misaligns the belt.

.. but would it effect the timing already set on the car. It ran fine 2 weeks ago.
There was a TSB dated somewhere around 1966 which stated to use the reiforcement BEHIND the water pump pulley. My memory is short on details.

If the timing is set, the outer ring of the balancer could fly completely off and it wouldn't affect the timing.
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Old Oct 7, 2015 | 07:21 PM
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Originally Posted by MikeM
There was a TSB dated somewhere around 1966 which stated to use the reiforcement BEHIND the water pump pulley. My memory is short on details.

If the timing is set, the outer ring of the balancer could fly completely off and it wouldn't affect the timing.
It's clearly shown in my 66 Chevelle AIM and in dads 67 Corvette AIM
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Old Oct 7, 2015 | 07:24 PM
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Originally Posted by Nowhere Man
It's clearly shown in my 66 Chevelle AIM and in dads 67 Corvette AIM
What is?
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Old Oct 7, 2015 | 07:30 PM
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Originally Posted by MikeM
What is?
The water pump reinforcement spacer
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Old Oct 7, 2015 | 07:32 PM
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Originally Posted by Nowhere Man
The water pump reinforcement spacer
Great. Where does it say to position it?
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Old Oct 7, 2015 | 07:51 PM
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Originally Posted by MikeM
Great. Where does it say to position it?
Between the water pump hub and the pulley. It's only 1/16 thick if that If that throws off pulley alignment you have bigger problems
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Old Oct 7, 2015 | 08:13 PM
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Originally Posted by MikeM
There was a TSB dated somewhere around 1966 which stated to use the reiforcement BEHIND the water pump pulley. My memory is short on details.

If the timing is set, the outer ring of the balancer could fly completely off and it wouldn't affect the timing.
That's wha I was thinking. If the timing is set it won't affect it. It will affect setting the timing as the mark would be off.
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Old Oct 8, 2015 | 05:33 AM
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Originally Posted by Nowhere Man
Between the water pump hub and the pulley. It's only 1/16 thick if that If that throws off pulley alignment you have bigger problems
Does the AIM say ALL engines or some engines? Just curious.
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Old Oct 8, 2015 | 07:20 AM
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Originally Posted by MikeM
Does the AIM say ALL engines or some engines? Just curious.
It's been a little but I know it says on all BB and I think small blocks as well. Building by 396 Chevelle and dads L36 427 I only looked at those pages
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Old Oct 8, 2015 | 10:21 AM
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Originally Posted by shemp
I thought it goes in front of the water pump pulley. If you put it behind it pushes the pulley forward and misaligns the belt. My problem is I feel that the balancer has come apart again. When I feel the front side of the balancer I feel the outer ring of the balancer has moved forward from the rubber center. That was what was causing the noise, the crankshaft pulley had moved forward and is touching the water pump pulley. I just wondered if the outer part of the balancer had spun a little bit if that would cause a timing issue. I know it would make it tough to time the car due to the mark moving but would it effect the timing already set on the car. It ran fine 2 weeks ago.
If this is moving forward, the HB is coming off the crank. Was it a tight fit?
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