Wondering if anyone has any thoughts on my situation. Something's amiss but I can't wrap my head around what's going on. I'll be pulling the head and it may become obvious then, but interested in thoughts. 751 with v1903-e Kubota. 1500 hours, hasn't overheated. Was getting white smoke out of exhaust at idle, but would go away when given throttle. Ran good, maybe a little rough at idle, but not always. Ran a block test in the radiator and it tested positive for exhaust gas in the cooling system. Ran a compression test and all cylinders had right around 600psi compression. Cylinder 1 though was spitting out a good deal of coolant as I tested the other cylinders. I saw somewhere the compression spec for a v1903 was 540psi, but dealer checked the fsm and said should be 430-470psi. I'm wondering how compression would get so high across all cylinders, and how it held the compression in cylinder 1 with the coolant getting in? Any ideas are much appreciated. I'll be tearing down soon.