I have a 1986 Kubota B7200E with the D950LA 17hp engine.
It was bought last year with 740 hrs on it. When I initially looked at the tractor, I started it up and a very small amount of White/Black smoke was noticed but I checked all the obvious areas you would check for oil in the water or water in the oil. Nothing was out of the ordinary. I just chalked it up to sitting for a while.
As time went on,the smoke became worse upon start-up. But the weird things were ,it didn't always smoke on start-up and it always cleared up withing minutes of start-up if it did smoke.
I decided to take my injectors in for rebuild. The guys at the shop told me 2 things. I had water in my center cylinder ( the center injector tip looked like a mine field)and the 2nd was my center injector had gotten so hot the tip had turned a nice shade of blue. I guess this means I was dumping alot of fuel in the cylinder. I tried to find a compression checker but could not find one that went up high enough for a diesel. I did turn the engine over and the center cylinder sprayed water like a fountain. I tried blowing the cylinder out
with an air gun but it didn't seem to help so off came the cylinder head.
When I got the head off and turned it upside down, it looked like someone had taken a pin punch and went to town around the valves of the center cylinder. The top of the piston #2 is just as pretty as the other two and the cylinder walls are not bad at all. I don't think anything solid has been in there knocking around so it must be water.
I filled the water jackets with water last night and did not see any water seeping into the cylinder this morning. The head gasket, did not show evidence of water seepage but I don't have any experience at reading head gaskets. I don't have the time to tear down the engine all the way so I am looking for another way water can be getting into the cylinders. Any help would be appreciated.
It was bought last year with 740 hrs on it. When I initially looked at the tractor, I started it up and a very small amount of White/Black smoke was noticed but I checked all the obvious areas you would check for oil in the water or water in the oil. Nothing was out of the ordinary. I just chalked it up to sitting for a while.
As time went on,the smoke became worse upon start-up. But the weird things were ,it didn't always smoke on start-up and it always cleared up withing minutes of start-up if it did smoke.
I decided to take my injectors in for rebuild. The guys at the shop told me 2 things. I had water in my center cylinder ( the center injector tip looked like a mine field)and the 2nd was my center injector had gotten so hot the tip had turned a nice shade of blue. I guess this means I was dumping alot of fuel in the cylinder. I tried to find a compression checker but could not find one that went up high enough for a diesel. I did turn the engine over and the center cylinder sprayed water like a fountain. I tried blowing the cylinder out
with an air gun but it didn't seem to help so off came the cylinder head.
When I got the head off and turned it upside down, it looked like someone had taken a pin punch and went to town around the valves of the center cylinder. The top of the piston #2 is just as pretty as the other two and the cylinder walls are not bad at all. I don't think anything solid has been in there knocking around so it must be water.
I filled the water jackets with water last night and did not see any water seeping into the cylinder this morning. The head gasket, did not show evidence of water seepage but I don't have any experience at reading head gaskets. I don't have the time to tear down the engine all the way so I am looking for another way water can be getting into the cylinders. Any help would be appreciated.