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Tractor Talk Discussion Forum

JD 4030 getting water in the oil

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Willy P

07-27-2005 18:51:45




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My 4030 is getting water in the oil. Seems like when it gets warmed up it looses the water and the dip stick goes up. I pulled the head and the head gasket looked good and carried the head to the machine shop and he could not find any cracks or warpage,the tractor has better than 7000 hours on it and the engine has never been opened up,is there any other place that the water could get in the oil besides the block or the sleeves? Just didn't want to overhaul it yet. Thanks

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T_Bone

07-27-2005 23:11:17




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 Re: JD 4030 getting water in the oil in reply to Willy P, 07-27-2005 18:51:45  
Hi Willy,

I never tried this but I don't see why it wouldn't work. You might drain the cooling system and use some liquid dish soap with water then add about 20psi and see if it bubbles somewhere.

The dish soap would be easyly flushed out if cleaned out right after testing.

T_Bone



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Indydirtfarmer

07-27-2005 19:40:21




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 Re: JD 4030 getting water in the oil in reply to Willy P, 07-27-2005 18:51:45  
Bet you lunch that you have a pin-hole in a cylinder sleeve. That engine is one of many Deere's that's proned to "wet sleeve pitting". If you have the head back on, remove the oil pan, then pump a few pounds pressure into the cooling system. Look carefully at the sleeves, near the bottom, where they press into the block. (with piston in "up" position) I've seen about a dozen of 'em with that trouble.

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buickanddeere

07-28-2005 05:58:32




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 Every wet sleeve engine will cavitate pin holes Re in reply to Indydirtfarmer, 07-27-2005 19:40:21  
Odds are the coolant will test to -40F but the anti-corrosion additives were depleted years ago. Most parts stores have corrosion inhibiter additives and water pump lube. A ph test strip will show coolant acidity and that's what ate through the sleeve. The shock waves and cavitation from diesel combustion just makes the errosion/corrosion process faster. The money saved by not regularly changing the coolant is less than a set of sleeves. Don't use tap water to mix with the coolant. it's full of calcuim, lime, iron etc. Distilled water is cheap to mix with coolant.

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Indydirtfarmer

07-28-2005 18:03:29




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 Re: Every wet sleeve engine will cavitate pin hole in reply to buickanddeere, 07-28-2005 05:58:32  
True, every wet-sleeve diesel can suffer the ill effects of pitting, but SOME engines are more proned to the malady than others. The make-up of the metal in the sleeves, trace ammounts of flaked rust in the cooling system, and just plain ol' design characteristics lend themselves to early/easy pitting.



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turbo

07-27-2005 19:17:14




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 Re: JD 4030 getting water in the oil in reply to Willy P, 07-27-2005 18:51:45  
Most likely you have either pin hole in liner or o-rings on liners have let loose. Either way you need to go deeper.



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JMS/MN

07-27-2005 19:15:10




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 Re: JD 4030 getting water in the oil in reply to Willy P, 07-27-2005 18:51:45  
Doesn't it have an oil cooler like older, smaller JD tractors? Water cools the oil. Sometimes they leak.



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