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REV-UP/HR camshaft bolt drill?

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Old 09-20-2014, 02:14 PM
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REV-UP/HR camshaft bolt drill?

Anyone understand this

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Old 09-21-2014, 12:48 AM
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I've seen a broken an HR cam before exactly where the original threads are, they're just asking you to drill deeper into the cam and tap the holes to accept a longer bolt.

Now as to why do this?

I guess for non HR cammed applications this is a good thing to do?

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Old 09-21-2014, 09:30 AM
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Originally Posted by aackshun
I've seen a broken an HR cam before exactly where the original threads are, they're just asking you to drill deeper into the cam and tap the holes to accept a longer bolt.

Now as to why do this?

I guess for non HR cammed applications this is a good thing to do?
So if I use short bolts like the 3.0 then this modification is not necessary
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