Quote:
Originally Posted by Gene F
So how is this passage (pictured) not giving oil to the center main? Meaning why do we need another feed?
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That passage is just a dribble feed-gravity flow from the valve chamber. Mains are starved for oil until oil warms up on a cold day. The center main is stressed the most, so needs the most oil. Adding this line direct from the pump gives the extra oil that the center main needs in a quick, cheap and easy modification.