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Crankcase breather. Always blowing oil


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6 replies to this topic

#1 bread320i OFFLINE  

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Posted May 30, 2011 - 06:37 AM

My Wisconsin TRA-10d is always leaking oil out the breather. I've taken the cover off and taken the "reed" out but Im not sure how the crankcase vent works? How can I keep oil from running out the engine.

#2 jdcrawler ONLINE  

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Posted May 30, 2011 - 06:44 AM

Unfortunately, the piston rings are probably starting to wear down and you are getting blow-by.
This creates more pressure in the crankcase than normal and pushes oil out thru the vent.
  • Bolens 1000 said thank you

#3 olcowhand ONLINE  

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Posted May 30, 2011 - 09:23 AM

Make sure the drain hole in the block at the valve springs is not blocked. You definitely need the reed in there though.

#4 bread320i OFFLINE  

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Posted May 30, 2011 - 06:37 PM

Yes the reed is in there. I will take it apart again and check the drain hole one more time. Thanks guys

#5 olcowhand ONLINE  

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Posted May 30, 2011 - 06:43 PM

Yes the reed is in there. I will take it apart again and check the drain hole one more time. Thanks guys


If all checks out, it's rebuild time I'm afraid.

#6 Bobo OFFLINE  

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Posted May 31, 2011 - 12:15 PM

Does it have one of those umbrella valves in there?

#7 bread320i OFFLINE  

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Posted May 31, 2011 - 09:15 PM

Idk what an umbrella valve is?




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