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Oil in radiator

Oil in radiator

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brialin
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I just aquired a D6C 74A dozer. There is oil in the radiator and the previous owner said there was also some water in the oil. He took off the oil cooler and tried to pressure test it. He said it did not leak but it was not heated up when he pressurized it. I am not sure how he pressurized it, it may have been with rags in the end and blow air into it. The engine runs fine with no smoking or skipping. I know the cooler will put oil into the cooling system but can the water get into the oil? Should I just buy another cooler and try it or could there be something else wrong?

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Brian
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Sat, Mar 21, 2009 7:38 PM
SJ
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It sounds very much like an oil cooler problem so maybe if you have a good radiator shop near by to have them test it, I,d try that first.The coolant could leak in the oil when it setting so should be no mystery there.
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Sat, Mar 21, 2009 7:57 PM
brialin
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Reply to SJ:
It sounds very much like an oil cooler problem so maybe if you have a good radiator shop near by to have them test it, I,d try that first.The coolant could leak in the oil when it setting so should be no mystery there.
I have been messing around with the oil cooler. I put it in 140 degree water and have a few bubbles every 2-3 seconds. The water is now at 116 and the bubbles have almost stopped. I have 80 lbs air pressure going into the oil side of the cooler. I am assuming this may get worse at higher temperatures and am looking into an aftermarket oil cooler. Does anyone know where to buy used cat parts?

Brian
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Mon, Mar 23, 2009 2:27 AM
SJ
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Reply to brialin:
I have been messing around with the oil cooler. I put it in 140 degree water and have a few bubbles every 2-3 seconds. The water is now at 116 and the bubbles have almost stopped. I have 80 lbs air pressure going into the oil side of the cooler. I am assuming this may get worse at higher temperatures and am looking into an aftermarket oil cooler. Does anyone know where to buy used cat parts?

Brian
You could give Cleveland Bros. a call as this # is a Cat used parts store. (814) 342-4210
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Mon, Mar 23, 2009 2:35 AM
catsilver
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Reply to SJ:
You could give Cleveland Bros. a call as this # is a Cat used parts store. (814) 342-4210
If you ahve reached 80PSI and 116deg and the 'leak' has stopped, I don't reckon there is much wrong with the oil cooler, there first thing I would check is for a water pump seal leak, is the tell-tale hole blocked?
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Mon, Mar 23, 2009 4:53 AM
Old Magnet
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Reply to catsilver:
If you ahve reached 80PSI and 116deg and the 'leak' has stopped, I don't reckon there is much wrong with the oil cooler, there first thing I would check is for a water pump seal leak, is the tell-tale hole blocked?
This is the old style belt drive water pump....not likely your getting cross contamination there.
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Mon, Mar 23, 2009 7:04 AM
OzDozer
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Reply to Old Magnet:
This is the old style belt drive water pump....not likely your getting cross contamination there.
It sounds like a distinct possibility that there's a head gasket leak. Has the engine been hot recently? .. or has the head been off in recent times? There's always the possibility of a leaking seal or damaged ferrule between the head and block.
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Mon, Mar 23, 2009 8:52 AM
brialin
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Reply to OzDozer:
It sounds like a distinct possibility that there's a head gasket leak. Has the engine been hot recently? .. or has the head been off in recent times? There's always the possibility of a leaking seal or damaged ferrule between the head and block.
The machine supposedly was never overheated but I cannot guarantee it. Looks like I will have to pull the head and look at the gasket.
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Mon, Mar 23, 2009 7:06 PM
catsilver
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Reply to brialin:
The machine supposedly was never overheated but I cannot guarantee it. Looks like I will have to pull the head and look at the gasket.
No points for that, yes it's a D333B, a 40+ year old engine with many places to leak, I would be looking at the head gasket as well.
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Tue, Mar 24, 2009 4:55 AM
Old Magnet
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Reply to catsilver:
No points for that, yes it's a D333B, a 40+ year old engine with many places to leak, I would be looking at the head gasket as well.
The D333's and D330's are notorious for overheating and cracking heads and leaking.
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Tue, Mar 24, 2009 7:46 AM
brialin
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Reply to Old Magnet:
The D333's and D330's are notorious for overheating and cracking heads and leaking.
Will I be able to see what is wrong with the head or gasket or will I have to have the head magnafluxed? I have a 2 day job to do for a friend. Will I do any harm to the engine if I run it or should I park it until I can fix it?
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Tue, Mar 24, 2009 6:05 PM
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