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No oil holes, no oil to the top end...
And no hydraulic lifters...how is oil getting pumped to the top end?
No idea of the right answer, I'm simply pointing out that the top end is lubricated by oil being pumped by the hydraulic lifters, through the pushrod tubes, into the rocker assemblies and flowing out to the shafts, rockers, and valve guides.
How will solid-follower cams account for that?
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