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9600 combine engine water in oil

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620

11-30-2006 17:13:53




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neighbor 9600 has water in the oil they drained and refilled oil put water af in it and it went in the oil pan as fast as they put it in. The jd dealer says its the water pump any one have any other ideas.I thought it was the oil cooler or head gasket till the water went in the oil pan that fast .Never herd of a water pump puting water in the oil sound like a poor design water pump goes out and engine blows . Is normal for this engine design ?

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G/MAN

12-01-2006 16:10:16




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 Re: 9600 combine engine water in oil in reply to 620 , 11-30-2006 17:13:53  
It's almost certainly the water pump, or the next most likely cause would be badly leaking liner o-ring or cracked liner. The reason you can pretty much quickly discount an oil cooler or head gasket is that the lubrication system develops far more pressure than the cooling system, and a leak at the oil cooler would result in oil in the coolant, not coolant in the oil, at least with the engine running. And a head gasket would have to blow in a very precise manner to allow coolant to flow directly to the crankcase. And no, this isn't "normal" for this engine design, but yes, it does happen. Water pump life is pretty much directly affected by cooling system maintenance. I've seen those pumps run many thousands of hours if the cooling system is maintainted. And I've seen them fail much earlier if the coolant is allowed to turn to junk. The main thing is to keep the weep hole open so that once coolant DOES start leaking past the seal, it can escape to the outside of the engine, instead of being forced past the lip-seal that seals the pump from engine oil. And of course checking both the coolant and engine oil levels daily (at least in a combine - twice a day sure doesn't hurt) can be an early tip-off to this problem and let you know something is up before you dump major amounts of coolant into the oil and do major damage to the engine. It's rare that they just go completely south all at once. The flood usually starts as a trickle and can be detected. I've worked on several tractors this has happened on, and haven't had a catastrophic engine failure yet, because it was caught in time. Some of them the customer has wanted to drop the pan and replace the bearings and inspect the crank, sometimes they want to flush it and go. But I've never had to put a crank in one because of this yet. Now sucked-in rear main seals and an operator that ignores the oil pressure and shut-down lights is another story...

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TylerARK

12-01-2006 05:48:37




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 Re: 9600 combine engine water in oil in reply to 620 , 11-30-2006 17:13:53  
Sadly, that is fairly common. Our shop has rebuilt at least 6 of these engines in the last two years because of the same problem. Two others ran them too long and had to have the engines replaced since they were not rebuildable.
Tyler



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8850dave

12-01-2006 03:33:25




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 Re: 9600 combine engine water in oil in reply to 620 , 11-30-2006 17:13:53  
That is very common as water pump seal goes out and leaks internally into the engine oil and then once contaiminated usually the engine needs new rods and main bearings and sometimes complete major.



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H. Moyer

11-30-2006 17:59:19




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 Re: 9600 combine engine water in oil in reply to 620 , 11-30-2006 17:13:53  
You may have an internal crack in the water jacket. You may have to rebuild your engine or you could try puting "Stop Leak" or "Liquid Glass" in the radiator.



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Bob

11-30-2006 17:28:09




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 Re: 9600 combine engine water in oil in reply to 620 , 11-30-2006 17:13:53  
I don't know WHY they'd come up with that design, either, but are NOT alone in using waterpumps driven by the timing gear train.



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