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JD Diesel

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Jack

04-25-2003 17:43:48




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I have a JD diesel 4020 and noticed it is blowing smoke on the bottom where it lines up with the tranny.Is this normal and if not what do you think it could be.
thanks
jack




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G-MAN

04-26-2003 10:14:57




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 Re: JD Diesel in reply to Jack, 04-25-2003 17:43:48  
That is where the blowby tube is located. Were it missing, the smoke would be venting up under the hood, as the tube comes out of the valve cover. Some vapor coming out of that tube is normal, as all engines will have some compression escape past the rings. There is actually a crankcase pressure spec that can be measured there with a manometer, but it is rarely if ever done. If the vapor is excessive or there is oil running out of the tube (a drip every now and again is normal), your rings are probably getting worn and allowing excessive blowby. The amount of vapor will be dependent on engine temp, engine load and so forth.

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twopop

04-25-2003 19:12:20




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 Re: JD Diesel in reply to Jack, 04-25-2003 17:43:48  
there is a chance the blow by tube extension on the right hand side of the engine is missing and the smoke is just blowby from the engine,going thru the frame.then spreading out to look like its from the area you stated.



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