SO, whats behind this cover?

If you guessed, the air passage way, you guessed right.
Those of you who are familiar with 2-stroke designs will understand what's going on here, and for those who don't...
A 2-stroke doesn't use valves for intake/exhaust. It uses ports that are exposed based on the position of the piston on it's stroke.
Now this is a very strange setup that I had never heard of until starting this Career. But these engines use a combination of intake ports on the cylinder, and exhaust valves on the heads to allow a turbocharger to work.

Also note, hollow block. Took me a while to figure out that the pipe shown is for coolant. Otherwise how the hell would these things not burn up? When I saw this setup for the first time I was awe-struck. Especially considering this is not a new design by any means.
I'll snap a photo of the top end tomorrow. Equally fascinating. A 2-stroke with valves, turbocharger, and camshaft? wtfsauce.







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