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How to tell if a motor is externally or internally balanced

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dfree383
capncruncher1965
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BIG BLOCK FORD :: GENERAL TECH :: ENGINE TECH

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How to tell if a motor is externally or internally balanced Empty How to tell if a motor is externally or internally balanced

Post  capncruncher1965 February 3rd 2018, 12:25 pm

Guys its a 545 stock block steel crank. Thats all we have and dont have a clue which flywheel or ballancer we need.thanks
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Post  dfree383 February 3rd 2018, 2:07 pm

Pull the crank and have it spun?
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How to tell if a motor is externally or internally balanced Empty Thats not good

Post  capncruncher1965 February 3rd 2018, 3:27 pm

Motor is put together lol thanks for your reply any other suggestions
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Post  dfree383 February 3rd 2018, 3:29 pm

Can ya ask who put it together what it is?

Odds are it's internal but not 100%
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Post  rmcomprandy February 3rd 2018, 4:30 pm

capncruncher1965 wrote:Motor is put together lol thanks for your reply any other suggestions

Without taking it apart and checking ... Pick one and install the components.
If it vibrates excessively ... it's the other.

you asked ... Wink

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Post  BBFTorino February 3rd 2018, 6:57 pm

Do you know the manufacturer of the crank?? It should have a part number or some identifying character stamped on it somewhere.

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Post  capncruncher1965 February 3rd 2018, 7:03 pm

My buddy just put it together thats when we looked at the flywheel that came with the motor it had weights on it.
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How to tell if a motor is externally or internally balanced Empty Scat crank ?

Post  capncruncher1965 February 3rd 2018, 7:05 pm

I think its a scat crank that what the strocker kit was. I know its steel
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How to tell if a motor is externally or internally balanced Empty Headache lol

Post  capncruncher1965 February 3rd 2018, 7:07 pm

Motor has been one headache after the other lol
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Post  hbstang February 4th 2018, 10:39 pm

i have an older 545 stoker engine and it is external balance withe the hatchet on the crank spacer and a weight on the flexplate.not sure what crank eagle or scat but it is a cast crank.
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How to tell if a motor is externally or internally balanced Empty No hatchet on crank

Post  capncruncher1965 February 5th 2018, 12:48 am

Thanks for replying guess we are going to have to pull the pan back off. Oh well thanks guys for your replys.
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Post  Wayne Pearce February 5th 2018, 12:20 pm

If it's an externally balance stroker motor, wouldn't it still have the hatchet weight on the front of the crank?

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Post  BBFTorino February 6th 2018, 2:38 am

Wayne Pearce wrote:If it's an externally balance stroker motor, wouldn't it still have the hatchet weight on the front of the crank?

  Wayne SAWDOFF Pearce
Unless it got lost!!

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Post  Wayne Pearce February 6th 2018, 6:55 am

I assumed when the OP said the motor was together, it mean't it was all together - my mistake.

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Post  dfree383 February 6th 2018, 9:04 am

If it came with an external flywheel from wher you bought it I'd run it with it.

The balancer are zero with either, you will have a spacer with the hatchet if it's external.
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How to tell if a motor is externally or internally balanced Empty Its internally ballanced

Post  capncruncher1965 February 14th 2018, 2:44 am

Pulled the pan its internally ballanced thanks guys for your help
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