I recently acquired this bobcat (clark) 825 with a Perkins 4108 in it. The previous owner was smelling antifreeze from the exhaust. He pulled the head and was told a sleeve had a crack in it. He sold it because he couldn't find a Perkins for a reasonable price. I purchased it. Took the head to a machine shop to have magnafluxed and determined it had 3 cracks by the valves, and warped 8 deg. So I'm in the process of installing a V2203 Kubota. Just wondering what others have done with their 825 engine wise, problems, advantages, disadvantages with this old machine! From lurking on this forum, I'd say there are not too many of these old beast being used/talked about here.