Front "China wall" sealing issue on SBM

str12-340 said

Even if the engine has some blow by the PCV system should handle it. It look like you have a lot of pressure inside the block to push that much oil out, that high in the block. You might want to see how much vacuum you are getting from the PCV. The inside of the block should ideally have a slight negative pressure from the PCV system, at which point oil wouldn't come out even if there was a slight leak in that seal.

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Noted, again though it only leaks when I'm hammering on the engine repeatedly at high RPM, like above 4,000. When cruising around or even occasionally stomping on the gas and running through the gears very minimal oil leaks out. It happened the most at track days when I'd be going around a tight course in 1st gear (2.94 rear gears back then) and go to redline (5,500-6,000) at WOT on the final straightaway; I'd get back to the staging lanes and notice a small puddle of oil on top of the timing cover.