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John Deere Tractors Discussion Forum
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BR blow by???

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58401

12-09-2006 08:03:25




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I just got my 45 BR running last night and sounds good. The problem is or think is it seems to have alot of exhaust comming out of the crankcase breather stack. What do I do? What is my problem? Thanks for any help!




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Hoosier Tom

12-09-2006 18:48:02




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 Re: BR blow by??? in reply to 58401, 12-09-2006 08:03:25  
Put the BR to work, a dyno,baker fan, or just field work. I bought a B that had been overhauled and it took a week of field work to seat the rings.



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Paul from MI

12-09-2006 15:15:20




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 Re: BR blow by??? in reply to 58401, 12-09-2006 08:03:25  
Overhaul can mean about anything depending on who did it. But still sounds like the rings aren't sealing right. Good compression kind of points toward something else. Have you checked the crankcase vent filter? Might be plugged. Try running it awhile with the filter removed to see if the problem is reduced.
Paul



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58401

12-09-2006 15:55:48




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 Re: BR blow by??? in reply to Paul from MI, 12-09-2006 15:15:20  
I tried that last night, didn't seem to help.



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Paul from MI

12-09-2006 09:20:36




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 Re: BR blow by??? in reply to 58401, 12-09-2006 08:03:25  
If you just got it running, did you overhaul it(new rings maybe?)? If so, they may just need to run a while to seat.
If it's just been sitting for a time, the rings may be stuck. Sometimes they will free up with some running and some Wynn's or other product in the oil, but if they are really stuck to the pistons you'll have to take it apart and put new ringfs in it.
Is compression good? If not it maybe time for a set of rings, etc. Excessive blowby usually means the rings/pistons aren't sealing to the cylinder walls properly.
Good luck,
Paul

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58401

12-09-2006 14:52:50




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 Re: BR blow by??? in reply to Paul from MI, 12-09-2006 09:20:36  
Thanks Paul.. The guy I purchased this from said he had overhauled it awhile back. It's been sitting for 2 years and I just got it running last night. i had it running for about 2 hrs today, still have the blowby. It does seem to have very good compression.



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