BrainP
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Im getting coolant in the engine oil of my NHC250. Im guessing oil cooler. Any other ideas?
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Coolant in engine oil
- Thread starter BrainP
- Start date
- 2,102
- 27
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- Delta Junction, Alaska
That's the most likely. I have had that happen a couple of times, but on other engines. After I replaced the cooler, I used a whole box of Cascade Dishwasher soap in the radiator, and ran it up to temperature for a couple of hours, to clean the system.
elkhtr
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- Stanwood, Wa.
Hole in the cylinder liner.
Head gasket.
Any other symptoms?
Head gasket.
Any other symptoms?
- 8,392
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Coppers, air comp head, rain water....
- 9,576
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- Dickson,TN
As has been stated, it could be lots of things. The worst of which would be a cylinder liner but I'd eliminate all other things first.
74M35A2
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What are the symptoms (not doubting you)? Coolant eats bearing platings in high concentrations.
RAYZER
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Freez plug on top of the head leaking coolant.
- 2,811
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- Mt. Eden, KY
Leaking oil cooler will put oil in the coolent, not the inverse. I had the same issue, turned out to be #3 cyl liner scrored/cracked. Symptoms; Started and ran ok, made stream at idle that burned the eyes. Drop the oil pan and bar the engine over. Let us know.
JC
BrainP
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it runs great but smokes. Haven't notice a loss in power. i know what you mean about oil in coolant. oil pressure is higher than coolant pressure except when not running. Other than that it got hot on me, but due to low coolant i bet. Not much rain out here or where it came from. guess I'm going to have to start opening it up. thanks for the ideas.
BrainP
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Has anyone put a turbo on one of theses and seen big difference? If I'm going to tear into it I might as well consider anything else I've thought about doing.
ranchhopper
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- south elgin illinois
If its getting hot check the head gasket first.
elkhtr
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What color is the smoke, what does it smell like?
- 9,576
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May be time to drop the oil pan a see if you can see where the water is coming from. It will work better if you have a way to pressurize the cooling system a little.
If you've got heavy white smoke from the exhaust, It pretty much has to be a head gasket or liner.
Electrolysis isn't all that uncommon in these engines. I've rebuilt two of these engines where the liners were ate completely through because of it.
If you've got heavy white smoke from the exhaust, It pretty much has to be a head gasket or liner.
Electrolysis isn't all that uncommon in these engines. I've rebuilt two of these engines where the liners were ate completely through because of it.
- 2,102
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- Delta Junction, Alaska
wow... Better skip this one! I read it backwards!
elkhtr
Member
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- Stanwood, Wa.
This is what I did to find my coolant in oil problem.
Drop the pan, and yes it will come out with a little wiggling.
Made a simple tee, plumbed it into the port the water temb sensor is at.
The tee had a schrader valve and a pressure gage.
Gently put about 12 psi on it, and a couple seconds later it was raining from #1 cylinder.
Hope that you see something else.
Good luck!
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The coppers are the copper sleeves in the head that are at the bottom of the injector bore. Coolant is on the other side of them, it is thin copper to cool the injectors. If the cooling system has been neglected, the same type of cavitation, erosion, electrolysis can happen to the copper where the coolant meets an area of cast iron/copper junction. The coolant can and will eventually erode the copper causing coolant to leak into the cylinder and in real bad cases, put compression into the cooling system. the coolant will go right past the rings into the oil. In cases where the copper leaks real bad, the engine hydraulics. In the case of one leaking under pressure, the coolant leak will be slow enough to fill the bowl on the piston and just leak past the rings. The symptom of that is heavy white, sweet smelling (if antifreeze is in use) smoke at start up, maybe a miss that goes away after a min or so after start up.