MWR
The Road not Taken.
- Joined
- Sep 2, 2008
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The hardest physical part of building an engine is installing the valves properly. Other than that make sure you've got the timing aspect of the engine set up properly.
On a rebuild, I'd hone the cylinders and use new piston rings that fit properly. Additionally it's probably good to get the head and manifold machined to ensure a good fit and no leaks.
I've got an old Kohler 321 off a Wheelhorse tractor that I've taken apart. It seems that you have to have some kind of tool to align two balance gears so they are in time. Seems complicated to me so that's where I'm at on that project.