Got a couple questions on reassembling the engine on a 2025r from a novice. I'm mechanically minded but never been inside an engine before.
Quick back story is we have been using the tractor to mow at the office for ~4 years and the person mowing put it into the pond running nose first. Only the seat was sticking out when I went out there to wade in and pull it out by the lift arms. I honestly don't want to know really it's just better that way at times . Tractor was under insurance still so had the local deere dealer pick it up and take a look and report back was a bent connecting rod, the engines can't be rebuilt so $13k. Once some parts were depreciated we would have to put out about $3000 for it and said no thanks just bring us back the parts; we'll get a zero turn and deal with the tractor ourselves.
Took the pistons down to our maintenance shop we use for the trucks and asked them to take a look (little smaller than the semi engines but we do a lot of work there and have a good relationship. Their opinion was they couldn't really find any bends/imperfections everything measured out exact that they could find. If there was anything it was very very minute. If it was theirs they would clean everything up really well and put it back together; see how it runs. Not looking to bash on anyone I get it; no one wants to put risk liability putting stuff together on an insurance job then it had an issue and breaks 3 months down the road due to something unforeseen. Instead it's if it could be wrong replace it.
Got a gasket kit and technical manual. Found I'm missing half of the bearings that go to the connecting rods already so I'll have to order 3 sets of them and a ring set (busted an oil ring putting them back on). Here's my questions:
1. The technical manual talks about making sure that every piston is marked to make sure that they go back into the cylinder they came out of. That's not going to happen unless there are marks I can't find. I got pistons and rods dissembled in a box along with (hopefully) all the bolts, ring clamps, etc that I'll need. Are the pistons marked somehow from the factory? I even tried looking for a wear pattern in common with the head and just can't make anything out.
2. I'm seeing torque specs from 20 to 200-243. I'm assume a pretty basic set of 3/8: 10-90# and then 1/2: 20-250# will take care of me? I see 1/4" wrenches that say 20-200 on them but really question getting that much torque accurately with the wrenches as short as they are.
Anything I really need to be aware of other than take my time, follow the manual and lots of lubriplate grease as it's going together?