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View Full Version : Drilling out wastegate hole?


BigT
02-02-2007, 12:33 AM
I might purchase a turbo locally, but the turbine housing wastegate passage has been welded shut. Do you think i'll be able to cut/drill/whatever the passage open without damage to the turbine housing? Attached is a pic of what i'm talking about.

http://img.photobucket.com/albums/v722/TalhaS85/turbinehousing.jpg
91tsiguy
02-02-2007, 01:28 AM
Sure, but it won't be fun. I'm sure you'll need to use a die grinder after some point. This is for a wastegate mounted on the o2 then I take it?
gtluke
02-02-2007, 10:54 AM
i'm going with no, its going to be an abortion and take you $100 worth of bits and shit.

what kind of turbo is that?
gtluke
02-02-2007, 10:55 AM
i'm going with no, its going to be an abortion and take you $100 worth of bits and shit if you want to put the wastegate on the o2,
and no way can you put the stock flapper back in

what kind of turbo is that?
BigT
02-02-2007, 11:37 AM
GT3076R
BigT
02-02-2007, 07:25 PM
Sure, but it won't be fun. I'm sure you'll need to use a die grinder after some point. This is for a wastegate mounted on the o2 then I take it?

Yes, i have a turbotrix o2 housing with a tial 40 on it.
Adriano
02-02-2007, 08:20 PM
I dont think it's gonna be that hard. You will first have to drill a hole (1/2 inch or so) and start porting it out with a die grinder and porting bit. Shouldn't be too much of a hassle.


Adriano
atc250r
02-02-2007, 08:42 PM
Cast iron is really easy to drill through, just be sure to use plenty of oil on it. Once you get a decent sized hole to start off (1/4") you can go to a UniBit and blast it up to 1" in no time. From there you can grind away until you're happy with it. You could also drop it off when you drop your head off at my buddy's house and he'll do whatever you'd like with it.

John
91tsiguy
02-03-2007, 01:36 AM
If you can take it to someone with a plasma cutter, that'll make life 100 times easier. All you'll need to do then is clean the edges up with the die grinder bit.
BigT
02-03-2007, 02:08 AM
If you can take it to someone with a plasma cutter, that'll make life 100 times easier. All you'll need to do then is clean the edges up with the die grinder bit.

I COMPLETELY forgot about a plasma cutter. My dad has one at the shop he works at. :twisted: Thanks, Brent.