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Old 05-09-2010, 01:41 PM   #1
trainguy
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Default 3 5/16 bore in a 59a block

Will the 59a block safly take a 3.5/16 bore?If so will I have overheating problems?
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Old 05-09-2010, 01:53 PM   #2
Pete
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Default Re: 3 5/16 bore in a 59a block

3 5/16 is a safe overbore.
No overheating problems.
Be sure to have the block pickled before
doing any machine work on it.
Hot tanking alone will not get the rust out of the water jackets.
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Old 05-09-2010, 02:09 PM   #3
296 V8
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Default Re: 3 5/16 bore in a 59a block

I’m no expert by any stretch but I have seen a bunch of em get bored at my buddy’s shop. In 10 or so years iv seen one 59 block hit water in one hole at 3 5/16”.
May have been rusty....could have been core shift. It got fixed.
That being said im not scared mine is at 3 3/8”.
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Old 05-09-2010, 02:24 PM   #4
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Default Re: 3 5/16 bore in a 59a block

Quote:
Originally Posted by 296 V8 View Post
I’m no expert by any stretch but I have seen a bunch of em get bored at my buddy’s shop. In 10 or so years iv seen one 59 block hit water in one hole at 3 5/16”.
May have been rusty....could have been core shift. It got fixed.
That being said im not scared mine is at 3 3/8”.
Roger on that.
I have seen a couple of them get into porosity at .030 over in the old days.
Sonic testing sure saves wear and tear on the boring bar these days.
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Old 05-09-2010, 03:31 PM   #5
harry jackshaft
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Default Re: 3 5/16 bore in a 59a block

i run a 3 3/8 bore and i can't get the thing hot enough..
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Old 05-09-2010, 05:22 PM   #6
Bassman/NZ
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Default Re: 3 5/16 bore in a 59a block

I've even seen 3 7/16 but that's getting pretty dodgy.
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