Midnightmoon
Senior Member
Got a nice mystery here. Brought in a machine with heavy white smoke issue. Checked all the basics, then checked compression, valve lash and then a leak down test. One of the cylinders was almost 100psi less then the rest on compression. Put some oil in the cylinder tried again, put a little more oil, then a little more oil and it finally came up to spec. I was also getting leak by into the base. Pulled the head, turned the motor over. Cylinder walls looked good. Looking more closely cylinder in question wasnt as high as the other cylinders a TDC. Well of course to pull the oil pan you have to pull most of the machine apart to get the engine out to pull the pan. A few swears later the engine and piston was out. Well the connecting rod was bent in two directions. front to back and side to side. The piston was cocked and likely leaking past the rings because of that. First time I've seen this in a kubota engine. These 3 cylinders are in alot of equipment I work on and this is a first for me. What gets better is this machine has less then 200 hours.
So Leaky Injector? Waiting to hear back from Kubota before we spend any more time on this one. Warranty has my hands a little tied.
So Leaky Injector? Waiting to hear back from Kubota before we spend any more time on this one. Warranty has my hands a little tied.