Roll pins and oil pressure

["Watry, Andrew" <Andrew.Watry@domain.elided>]

Aside from their job of helping hold O-rings in place, do roll pins in the
cam gallery oil passages really increase oil pressure throughout the engine,
or merely create a restriction and resulting higher pressure in the vertical
oil gallery, giving a higher oil pressure READING at the sending unit (and
so at the gauge), which on most 105/115/116 cars, is tapped into the right
rear oil gallery below the roll pin?  I would think you just get a higher
reading in that passage, and the apparent higher pressure, shown on the
gauge, would be phantom, and not really helping the engine out at all.

Andrew Watry

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