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Old 09-28-2013, 07:17 PM   #1
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Default Drilling the Greddy for 10mm question.

Okay, so the fellow I gave the turbo and manifold got the drilling and tapping of the manifold right as I can thread the 10mm studs into there, but the studs don't fit through the holes he drilled in the turbo. It's close, but not quite.

What size drill bit should I be using for this if I attempt to enlarge the hole? I'm looking at various tables online and I'm not really clear on this.

Also, I probably need to bring this to someone with a drill press. Hm, looks like a cheap drill press is $125 or so.
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Old 09-28-2013, 08:37 PM   #2
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Buy some $6 calipers at harbor freight. Measure the OD of the studs, then pick a bit that's barely bigger than that measurement.

You shouldn't need a drill press, the new drill will center fairly well on the current hole.
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Old 09-28-2013, 09:10 PM   #3
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or just eyeball it and use a thin dremel like I did lol
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Old 09-28-2013, 11:00 PM   #4
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Okay, those are options I have considered. I guess I will choose one and go for it. I think I need a few more drill bits to choose from for this though (or dremel bits).
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Old 09-28-2013, 11:05 PM   #5
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honestly just use an 11mm and a hand drill.

Cast turbocharger parts drill extremely easily, you will be amazed that you made any fuss about it.

Dann
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Old 09-28-2013, 11:15 PM   #6
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Okay, I feel better about the whole thing. I was holding off, but now I'll just go at it with the drill.
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Old 09-29-2013, 03:39 PM   #7
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Drilled it out. Unfortunately, the guy who did the holes for 10mm in the manifold didn't get one of them lined up properly. Won't work. I can't see maybe half the stud hole when I line up the other three. Criminy, this is why you don't use friends to help out with this crap.
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Old 09-30-2013, 09:01 AM   #8
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Quote:
Originally Posted by 18psi View Post
or just eyeball it and use a thin dremel like I did lol
I'll pretend I didn't see this ...
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Old 09-30-2013, 11:30 AM   #9
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I tried to save you Harvey. You wouldn't listen.
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Old 09-30-2013, 11:41 AM   #10
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Quote:
Originally Posted by hornetball View Post
I tried to save you Harvey. You wouldn't listen.
Yes, yes. My regrets are many.











Of course, now I have an excuse to get the axial manifold from abe.



Though, that was not my intent.
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Old 09-30-2013, 01:33 PM   #11
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Quote:
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Of course, now I have an excuse to get the axial manifold from abe.

Good plan then!
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