Generator Question
#1
Generator Question
Hi to every one. I would like some opinions to help confirm what I think is going on. I am an electrician and I deal with installs of generators. I have turned my share of wrenches on gas engines but have not had in depth experience with diesel. I was called to look at one of our generators that had shut down on axu. fault which was low water. This gen. is a 125kw with a JD 6 cyl. When I got there this morning I was looking it over and found a puddle of emulsified oil/water on the pan under the draft tube from the valve cover. I removed the oil fill cap and it was covered in the same. There was water also dripping from the tube. I told the boss I felt it was ether a crack in the head or a blowen head gasket. He is saying it just condensation The gen. has a block heater on it that keeps the engine around 85-95 deg. I am in NC and the temp. has been in the 90's I see no way it could be condensation not on that scale. After more conversation he did admit they had to put about 2 gals of water in it. Then where do you think the water is going He had no answer. My thoughts are leaning toward a crack in the head since I am not getting any water in the oil. Any other thoughts?
#2
#3
Not knowing what engine it is, If it has wet sleeves, it could have a sleeve leaking or rusted through, you could take a stab at it and change the HG , but to diagnose it right you should pull the oil pan , then pressurize the cooling system and look to see where it is leaking from. most of the time a HG will leak into the cylinder and hydrolock the engine. It could also be a faulty engine oil heat exchanger ( if the engine has one), although that will usually tend to put oil into the antifreeze, not the other way around.
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Dr. Evil (07-08-2009)
#4
Not sure what the capacity is. I was TOLD they added about 2 gal. I did not mention that we ran the engine and there was a lot of steam coming from the draft tube. Thinking more about it I now am leaning more to a crack in the head between the water jacket and a valve since the only place I can find water is in the valve cover.
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sounds like the boss is in denial-----depending on what series of john deere it is it can be the water pump as well-----the 4760 tractor had a hoky setup in which the coolant would dump in the oil when the pump went out-I cant remebr the series of engine that it was but they were used in gen sets as well