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I was cleaning some oil residue from an earlier dumb move - I try to keep things clean so any leaks that spring up show easily . I noticed along the top of the block towards the center from the right cylinder's valve cover a cast marking , cleaned it off and found this -
The casting mark clearly shows K532 .
Now , is this a case like the single cylinder blocks that were stamped "301" but you had to check internally whether it was a 10hp or 12hp engine ? K241 & K301 blocks are stamped the same and that is common knowledge .
But , what about the K482/K532/K662 twin opposed cast iron engines , same deal ?? Any insight on the blocks or anyone know for sure ?
Or - did someone swap out the original K482 from this '74 D180 to a K532 20hp from a donor ?? Some of the tins seem to be completely black to the bare metal , while others are clearly red underneath the black - so some painting has been done and this tractor it has at best a sketchy history . At one time it lived at the welding shop next to me to the West , or at least for a short time . The folks I got it from are about 40 miles away in a rural area and the gal that sold it had told me her father had gotten it from the town where I live - from the local welder . His son that now owns/runs the shop doesn't remember it but it may have belonged to his Dad who started the business - but he does say he knows his Dad never bought a new Wheel Horse , he'd only owned a Cub or two that he remembered . Anyway , hard telling on it's history and a lot of mods/repairs have been done in the machine's lifetime .
I'm just curious if this is the original engine/block - the tins are marked as a K482 / spec 35222b as it should be to match the '74 model year in the published model year reference list . The model tag was long gone off the tractor when I got it , the year came from figuring out the sum of it's parts as to the model and such . Maybe that casting mark explains why this engine feels so strong , there is a noticeable difference between the 482 and 532 engines before from when we used them in other industrial equipment such as Ditch Witch , ect . The 20hp version just had a lot more torque and grunt compared to the 18hp . The K662 is insanely powerful and quite underrated - I ran one of those years ago on a compactor with a gear drive transport feature - that engine is a whole different animal compared to the 18 & 20 versions .
So this is my man's @Rp.wh12 hp '68? Raider that had a little mishap at my recent plow event. Good news here is the block was not ventilated so we think with a little coin and some greasy hands this motor can be saved. It seems that when a rod goes it will either punch the block or go the other way to the cam. Which is what it did breaking the cam. Note the indent on the fuel pump lobe where something wacked it. Piston shirt was busted up pretty good as it looks like the piston was slammed down on the crank. Wrist pin was ovaled and the whole bottom of the piston was mashed. This was done under a full load of dirt and plowing. @PeacemakerJack claims to have a video of when it went so perhaps he'll share here.
I chewed my man's rear out about it running it low on low oil and tipped over in the furrow but he swears he topped it off before the day. I dunno but but not much oil came out and what did was sludge. Regardless damage is done so let's just fix it. New 10 over piston with rings is in order along with a new cam and 10 under rod. Bore is clean and not tapered so a std. piston and rings might be fitted in but is getting close to max out of tolerance so might as do it right. Obviously suffering from some low end lubrication issues.