Hi,
I have a ZD331 that I have had since new. It currently has 446 hours. This is one of the first ones sold and I was one of the lucky ones to put the fan through the radiator at 10 hours. Kubota covered it under warranty and issued a recall, the engine mounts allowed too much movement that allowed the far to contact the radiator. So I know this machine was hot once in it's life, 6 years ago. Since then it has ran fine, maybe used a cup or two of coolant every year. The dealer told me to "keep an eye" on it.
This year I began to notice white smoke at start up and more coolant loss. The dealer now says "its been too long" so it's all on me now.
The machine has been running fine. Today I pulled the head and everything appeared ok. I had the head magna fluxed and no cracks were found. I did notice the head is approx 0.005 warped. It is low in the center. The machine shop I use was unable to mill it due to the steel injector cups. So not wanting to wait I put it back together with a new head gasket. Now the machine will not start. I took it apart a second time and reinstalled and retorqued everything. Valves are adjusted.
Is 0.005 enough to cause a leak? Why would it run but after putting it back together now it won't.
Cam the head be milled enough to get it flat?
Any recommendations are appreciated
Mike
I have a ZD331 that I have had since new. It currently has 446 hours. This is one of the first ones sold and I was one of the lucky ones to put the fan through the radiator at 10 hours. Kubota covered it under warranty and issued a recall, the engine mounts allowed too much movement that allowed the far to contact the radiator. So I know this machine was hot once in it's life, 6 years ago. Since then it has ran fine, maybe used a cup or two of coolant every year. The dealer told me to "keep an eye" on it.
This year I began to notice white smoke at start up and more coolant loss. The dealer now says "its been too long" so it's all on me now.
The machine has been running fine. Today I pulled the head and everything appeared ok. I had the head magna fluxed and no cracks were found. I did notice the head is approx 0.005 warped. It is low in the center. The machine shop I use was unable to mill it due to the steel injector cups. So not wanting to wait I put it back together with a new head gasket. Now the machine will not start. I took it apart a second time and reinstalled and retorqued everything. Valves are adjusted.
Is 0.005 enough to cause a leak? Why would it run but after putting it back together now it won't.
Cam the head be milled enough to get it flat?
Any recommendations are appreciated
Mike
