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455 harmic balancer bolt

455 harmic balancer bolt

Old July 10th, 2018, 03:10 PM
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455 harmic balancer bolt

Seems that the threads are screwed up on the crank of my 455 motor for the harmonic balancer. Does anyone know the size tap I will need to clean em up? It is pretty big bolt. I am guessing 5/8 diameter or more.
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Old July 10th, 2018, 03:35 PM
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Should be 3/4-16, here is a tap recommended to a member with a similar problem.

Click on the Amazon link.
Amazon Amazon
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Old July 10th, 2018, 04:44 PM
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Thanks Eric. I will buy one!
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Old July 10th, 2018, 05:30 PM
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Be sure to check the first two or three threads on the bolt. I like to keep a small three cornered file around to touch up dings.
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Old July 10th, 2018, 06:08 PM
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I got a new bolt. When I tried to start it by hand, it bound after i turn. I didnt want to force it and ruin the new bolt, si I am going to retap the crank threads. They are slightly burred.
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Old July 10th, 2018, 06:39 PM
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Use some cutting oil with it.
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