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Old 08-08-2001, 06:29 PM   #1
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Car: 90 IROC
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What size tap do I need for crank snout bolt hole on a 400sb?
I was pulling my harmonic balancer off to install the new cam. I couldnt find the piece for the tip of my puller. I got it off but I screwed up the first two threads on the crank snout. Now the bolt wont go in that holds the balancer on.

It doesnt look to bad so I think I could use a tap to clean it up.



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Old 08-08-2001, 06:39 PM   #2
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7/16"-20 (fine)

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Old 08-08-2001, 06:50 PM   #3
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Join Date: Jul 1999
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Car: 90 IROC
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Thanks alot RB! I thought you would know. IM off to pepboys......

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Old 08-08-2001, 07:29 PM   #4
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Join Date: Jul 1999
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Car: 90 IROC
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Axle/Gears: 9 bolt 3.27

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The tap worked I can get the bolt in. I need to run a tap thru the head bolt holes in the block. Do you happen to know what that one is?



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Old 08-08-2001, 07:37 PM   #5
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But of course... 7/16"-14 (std thread)

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Old 08-08-2001, 08:49 PM   #6
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Join Date: Jul 1999
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Car: 90 IROC
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Transmission: GMPP 93/4L60
Axle/Gears: 9 bolt 3.27

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Thanks! If I can help you with anything please let me know.

You have been alot of help to me with my 400 buildup.

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Old 08-08-2001, 08:49 PM
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