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harmonic balancer installed wrong?

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Old Dec 28, 2011 | 10:40 PM
  #1  
Bigdeerock's Avatar
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harmonic balancer installed wrong?

Hey guys,

I brought my #1 to TDC. I work alone so i just removed the #1 spark plug and felt around in there with a small flat head until I could feel the piston at the top ( timing mark is at 0). Anyway the rotor button on my dizzy is pointing at the 7 o clock position instead of the 530. Is that where it should be? PO rebuilt the engine is it even possible to install the HB improperly?
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Old Dec 28, 2011 | 11:46 PM
  #2  
rgarcia63's Avatar
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Joined: Jan 2003
Posts: 2,133
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From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
Re: harmonic balancer installed wrong?

No, the HB is keyed to align with #1 ,TDC when the cam/crank gear timing marks are at the 12 o'clock position.
If the rotor is not pointing at the #1 terminal of the dizzy when the HB is aligned with DTC then it should be pointing at #6, rotating the crank another complete turn should point the rotor at #1. If not either #1, or #6 then timing is off.
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Old Dec 28, 2011 | 11:49 PM
  #3  
TreeFiddy's Avatar
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Joined: Jun 2005
Posts: 1,380
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From: Sydney, Australia
Car: '86 TA
Engine: '74 350
Transmission: 700r4
Axle/Gears: 2.77
Re: harmonic balancer installed wrong?

If the balancer mark lines up with zero on the timing tab with #1 exactly at tdc, that's how it should be.

From that position, it's 'traditional' (for easiest of wire routing and vac canister fit if u a vac adv dist), to install the dist so that the rotor is pointing at #1 cylinder, but is can be installed pointing anywhere. Just so long as the #1 plug wire post on the dist cap lines up with the rotor wherever it points.

Or you could be looking at the other instance of #1 tdc, at the start of the inlet stroke.
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Old Dec 29, 2011 | 07:19 AM
  #4  
AlkyIROC's Avatar
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Joined: Jul 1999
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: harmonic balancer installed wrong?

With the timing mark lined up, piston 1 and 6 (on a V8) are at TDC. Either one could be at TDC on the compression stroke You'll need to remove the distributor cap to see which one has the rotor pointed at the plug wire terminal.
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Old Dec 29, 2011 | 09:30 AM
  #5  
Darth 93's Avatar
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Joined: Feb 2002
Posts: 31
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From: Michigan
Car: 1983 Z/28, 2017 Camaro SS 1LE
Engine: L69
Transmission: 5 Speed
Axle/Gears: 3.73
Re: harmonic balancer installed wrong?

Mine harmonic balancer slipped ( inner ring to outer ring), so the markings were all wrong. had to replace the balancer.
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