Anyone know about old Wisconsin Engines?
 

I have this old 4 cylinder flat head model VH4d with a dead cylinder.
I pulled the head and found out why. The top ring looks like it broke and took the top part of the piston with it and ruined the head too.
I got a replacement head today.
The cylinders look like new with no ridge in the top

The question is...should I rebuild this myself or send it out?

These's would be the places to ask:
Tractor Forum : MyTractorForum.Com Tractor Forums
Antique Engines and Old Iron Tractors on SmokStak

If you send if out chances are they won't want to do a partial repair. You've gotten this far, why not do it yourself? You need some specs for torque and clearance for the new piston although the generic .0025-.0003 should work. If there are no signs of damage to the rod journals and they mic to fairly close tolerance, bolt the one rod back on the way it came off. I'll guess again, no more than .0015.

You should try to look at the valves and seats too. Now there's some tools the average guy doesn't have, valve grinder and seat cutter. You may need some help there.

Rebuild it yourself. Air cooled simplicity. Just replace that piston assembly and if the rest looks good, leave those as is and put it back together.

Have one of those engines sitting in an original old custom built power unit (gen, welder, water pump, air compressor) all in a custom trailer commissioned for the old president of Thor Tools. Sorry no books on it. But, also have a vintage 1950's beast Ariens rear tine tiller with a Wisconsin 2 cylinder including the book. Good possibility the tolerance and torque specs are similar.

I would think used or new parts are stashed somewhere for that Wisconsin. But lets assume you can't find parts. We've done quite a few very early period motors (1904 to 1920 era oddballs) that needed pistons and some valve train. Most of these rust heaps of engines can be ressurected by adapting other make pistons, bore cylinders to match, etc. Obvious lots of measuring and comparison ground work needs to be done, but anything is possible. The main question is what is the value or rarity of the engine and its worth to go this far?

Just do it yourself, very easy, almost like a VW. I had that same motor in the Zamboni I had.

dam they put them in Zambonis?
This is in a Mil Spec amphibious transport vehicle that the US used in Vietnam. less than 800 are known to exist and this is the original engine so I want to restore it and do a nice job. Mine is a little rough but this one is nicely restored

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