Dodgevillediesel
New User
Bought a late model 990 at an auction a couple weeks ago, knew it had engine problems, had a knock and hydraulic issues. Dropped pan when I got it home and it spun a bearing in #1 cyl. Either gonna have the crank reground or buy a new one. Anyway finished splitting tractor and checked hone on the rest of cylinders and noticed #3 cyl has a possible suspect problem too. Initially I felt my finger nail catch but cleaned it with brake cleaner and now it feels smooth but still discolored. The suspect area is completely horizontal and all the way around the cylinder. Seems odd that a crack would be horizontal all the way around and not vertical. My only other thought is its possible corrosion if it sat for awhile and the cylinder took on moisture/coolant. Curious if anyone has any thought on this or has had it happen
