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Good info! I'll have to pull the engine before the pan will come off. Then pistons will have to be removed and clearances set to spec. This will take me awhile but it has to be done. When I put it back together I'll let everyone know how it turns out. Thank you!

Thanks for your reply. Good point about the compression. It may be lower than optimum but still not bad enough to cause this problem. If the valve timing is ok then the problem pretty much would have to be internal drag. That would explain a reading of slightly lower compression as well as loss...

Thanks for the quick reply. I drained the oil pan and found no flakes. Lack of ring gap could contribute to friction, as would the main and rod bearings being set up wrong. The rods checked good by machine shop. No overheating since rebuild. New radiator and water pump. Also, the block was...

Ok, I'm backkkk. The Kubota mechanic decided he had other work to do so I'm the man. I pulled the head and found the engine had just one gasket, and no shim. The rebuilder had coated the head gasket with black RTV. I was taught that's a no-no and suspect that might be at least part of the reason...

There is no objectionable smoke when the engine is running, but there is some under acceleration just as with most diesels. You just might have hit the nail on the head though because if injection is out of time just a bit combined with the shim on the head gasket causing a loss of compression...

Ok guys, sorry I let this lay for a while but other work doesn't wait. Compression Test showed 360, 380, 360; a few lbs difference when small amount of 10W oil is added to each. I'll try to answer all your questions above. The engine was old and I've recently found it was...

Ok, good idea. I'll do that first chance and get back to you. I'll rerun the compression check as is and then with the small amount of oil. thx

Hello, This is my first post and its about my old Kubota D-950. I don't know what it came out of and the dealer can't tell me either by the block #. It was rebuilt locally by a mechanic who has since left the area. The engine lacks power and I'm guessing its putting out about 10 hp instead of...