EVO All Evo Model Discussion

How to cut new threads in crankcase?

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Old Sep 16, 2014 | 06:08 PM
  #21  
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Originally Posted by Dr.Hess
Guess we're back to a plug to get started and a bottoming tap to finish it then.
Talked to a few more folks and this is the plan. Use a "plug tap" first to get the threads mostly cut at a 1/2 a turn then take out and clean. Then finish the job with a "bottom tap" 1/2 turn at a time to keep things cleaned out. Possibly use 2 lb air pressure or a vacuum to help keep everything out of the crank.
That and a lot of luck and finesse.
 

Last edited by aces&8s; Sep 16, 2014 at 08:07 PM.
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Old Sep 16, 2014 | 08:20 PM
  #22  
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Originally Posted by Tom84FXST
Read the "Important Product Notes" For use on unassembled engine cases only...gotta cut that tap to use it on an assembled engine.
I didn't have to cut the tap when I did mine. The only thing the important notes say is for "unassembled engines only". Does not say you have to cut the tap if the engine is assembled.
All I did was load the tap up with grease and clean very often to get the aluminum chips out of it.
 
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Old Sep 16, 2014 | 09:04 PM
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Originally Posted by perki48
I didn't have to cut the tap when I did mine. The only thing the important notes say is for "unassembled engines only". Does not say you have to cut the tap if the engine is assembled.
All I did was load the tap up with grease and clean very often to get the aluminum chips out of it.
Thanks perki, Im on my way to Ideho so you can help me with it.
 
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Old Sep 16, 2014 | 09:23 PM
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Originally Posted by aces&8s
Thanks perki, Im on my way to Ideho so you can help me with it.
Been thinking about trying to find the "tap". I will look in the morning and see if I can find it. If I can you are welcome to it whether you are in Ga. or up here in Ideho.
 
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Old Sep 17, 2014 | 11:21 AM
  #25  
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When I was an aircraft mechanic many years ago we occasionally had to tap in places where shavings needed not to go. We would put axle grease on the tap and go for it. But, we would remove, clean, put on new grease as the process progressed. The trick is to not get greedy. As you get near the end be **** as heck about it and make sure to clean and add new grease. Those shavings stick to axle grease like crazy but, don't get tempted to push it.
 
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Old Sep 17, 2014 | 12:35 PM
  #26  
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Originally Posted by aces&8s
You may be on to something Schex. Mechanic said to put compressed air to tranny vent to see how much air will blow out and grease tap well.
Still sounds pretty chancy though.
if the tap is started, it would close the hole and therefore block the exit path for any of the air being applied. To me, that just opens up the option of any shavings to now getting blown around inside the case, which is what we're trying to avoid. I personally would not add air.
 
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Old Sep 17, 2014 | 12:54 PM
  #27  
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Taps have flutes. The shavings go in the flutes, the air would blow out the flutes. I think it's a good idea, but just using grease and frequent cleaning is probably good enough
 
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Old Sep 17, 2014 | 04:25 PM
  #28  
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Originally Posted by perki48
Been thinking about trying to find the "tap". I will look in the morning and see if I can find it. If I can you are welcome to it whether you are in Ga. or up here in Ideho.
Thanks Perki, mighty kind of ya. I think my neighbor has one he'll let me borrow. Many thanks though.
 
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Old Sep 17, 2014 | 04:36 PM
  #29  
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Originally Posted by Dr.Hess
Taps have flutes. The shavings go in the flutes, the air would blow out the flutes. I think it's a good idea, but just using grease and frequent cleaning is probably good enough
I think your right as usual Dr. Going 1/2 turn at a time and reclean is the trick. Maybe grease the flutes and then dip in cutting oil.
I very much appreciate all the input. 1st and 3 round is on me if it works.
 

Last edited by aces&8s; Sep 17, 2014 at 04:40 PM.
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Old Sep 17, 2014 | 04:48 PM
  #30  
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Originally Posted by aces&8s
I think your right as usual Dr. Going 1/2 turn at a time and reclean is the trick. Maybe grease the flutes and then dip in cutting oil.
I very much appreciate all the input. 1st and 3 round is on me if it works.


Hell first and third round is on you anyway!!!!
 
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