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#1
06-14-2011, 09:36 PM
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I have a problem with my CCO
I just started on the restoration of my original when I ran into a problem. When I pulled off the old exhaust all the threads in the block are all rusted and gone. Does anybody know a way to repair this.
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#2
06-14-2011, 09:37 PM
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Quote:
Got a pic of the threads? 
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#4
06-14-2011, 10:41 PM
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That's hard to believe. Perhaps the threads are buried under some rust. Try getting a small wire brush in there and gently swirl it around with the threads to see if the threads reappear.
Cub Cadet 123
__________________
Still don't know what I'm doing in OHIO?.....If you find me, then please point me back toward INDIANA. 
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#5
06-14-2011, 11:16 PM
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I could be wrong, but I don't think you can helicoil pipe thread. I bet it would also be pretty expensive compared to smaller holes. There should be two tapped holes on the exhaust port...you could make up an elbow that bolts to those if you do find the threads inside are gone.
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#6
06-15-2011, 07:14 AM
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I have to agree with Matt, I have not seen a heli-coil for a pipe thread.
But I lean new things every day. You might try a 1" pipe tap in the port to clean/restore what might be left as far as threads as many times this will work. If not, Matt's suggestion of a flange is the next least expensive option.
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#7
06-15-2011, 08:45 AM
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Take the exhaust valve out. Get a wire brush on the end of a drill. Use alot of PB and soak it good. Clean the threads with the drill running with the wire brush. If you can get a tap run the tap in and out with alot of PB again. You should get threads out of this because the port is pretty deep. You wont be able to use the elbow because I'm sure that will worn down. If you don't have a tap that size I make one out of the same pipe size and cut grooves in it with a wiz cutter. Try to make the grooves in the pipe on a sharp angle and deep. Use it like a regular tap. Lots of lube and run it in and out alot. You might have to use a street elbow instead of the correct elbow. It should work. Also make sure you use a locking ring on the elbow. Use furnace cement on the treads.
Good luck, Mike
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