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Crank Pulley Removal

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Old Dec 17, 2001 | 08:27 PM
  #1  
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Default Crank Pulley Removal

I can not break loose the center bolt on my crank pulley. Not sure if it's a standard or reverse thread. Any tips?? Motor is a 71 350.
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Old Dec 17, 2001 | 08:37 PM
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Default Re: Crank Pulley Removal (LT1man)

It's a standard fine thread bolt. Your best is a impact gun. second best is a big breaker bar. If you can't budge it with the above there is one sure fire way of removing it. I hesitate mentioning it but it works every time. UNPLUG THE COIL WIRE then put your 6 point socket on the bolt and bump the starter. ( Cheap Impact wrench) :)
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Old Dec 17, 2001 | 08:42 PM
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Default Re: Crank Pulley Removal (paso)

Thanks paso. I'll try the breaker bar method now that I know its a standard thread bolt. I wasn't sure if I was turning the sucker the wrong way. Stupid question but I won't effect the balancer by removing this pulley?
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Old Dec 17, 2001 | 09:11 PM
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Default Re: Crank Pulley Removal (LT1man)

Wait, your crank pulley is held on by 3 bolts which attach to the harmonic damper. If you are just trying to remove the pulley, you do not need to remove the center bolt, just the three smaller bolts. If they are off, just knock it with a peice of wood if it's stuck.
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Old Dec 17, 2001 | 10:01 PM
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Default Re: Crank Pulley Removal (Allan71)

I removed the three bolts that hold the crank pulley. HOWEVER, someone was in there before an put a 1/4" thick steel washer between the center bolt and the pulley. This thick disk was holding the pulley in place. Finally got it off. Does anyone know if that disk is factory?? The assembley manual shows a split washer/flat washer combination under the center balancing bolt. No idea why that thick washer was there......bubba?
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Old Dec 17, 2001 | 10:13 PM
  #6  
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Default Re: Crank Pulley Removal (LT1man)

No, the disk is not factory, just the split lockwasher that you described. How thick is the disc? Perhaps the previous owner used a bolt that was too long and the disc is acting like a spacer?
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Old Dec 17, 2001 | 10:51 PM
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Default Re: Crank Pulley Removal (Allan71)

The disk is 1/4" thick!! The bolt appears to be the original "A" headmark. I ran it back in and everything looks ok. Is it possible that the balancer moved back? Is the balancer on a spline? This one has got me scratching my head.
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Old Dec 17, 2001 | 11:14 PM
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Default Re: Crank Pulley Removal (LT1man)

Hey Allen, have you registered your vette yet?
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Old Dec 18, 2001 | 01:01 AM
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Default Re: Crank Pulley Removal (71,454,4spd)

Err, my car is decomishioned right now because, while driving down the road, my crank pulley FELL OFF! The belts caught it and it's still there, haven't had a chance to look at it fully. WHY DID THIS HAPPEN!? :mad
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Old Jan 12, 2019 | 12:46 PM
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Default Same Spacer

I see the same spacer on mine. How did you break the bolt to pull the lower pulley? Impact wrench? I've attached a picture of mine.
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Old Jan 12, 2019 | 12:49 PM
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Default Same Spacer

Photos

Here's the spacer on my lower pulley
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Old Jan 12, 2019 | 01:43 PM
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You're asking a question on an 18 year old thread.
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Old Jan 12, 2019 | 01:53 PM
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Default Same Spacer

Lmao.
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Old Jan 12, 2019 | 02:37 PM
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Default

But to answer, yes that big fat washer on a center bolt is OEM. And it does stop you from taking the pulley off.

Last edited by derekderek; Jan 13, 2019 at 09:47 AM.
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Old Jan 13, 2019 | 07:34 AM
  #15  
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Default

Thanks. Swapped out the balancer last night.
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