Two illustrations accompany this explanation.
• Cam support plate oil flow is shown in Figure 3-1.
• Bottom end oil flow is shown in Figure 3-3.
The “dual kidney” designation given to the oil pump refers to its two scavenging functions, whereby it simultaneously draws oil from both the cam and flywheel compartments.
Oil sucked up by the scavenge lobes passes through the scavenge gerotors of the oil pump and is directed through a return channel in the cam support plate (A40). See 3.5 OIL PUMP OPERATION.
Exiting a hole on the inboard side of the cam support plate, oil enters the upper hole in the crankcase flange (B41).
Oil flows through the upper passageway in the crankcase (A42), enters a passageway at the front of the transmission housing and empties into the oil pan (Q43) onto the front of the baffle plate (R44).
Oil flows to the rear of the oil pan along the top of the baffle plate. It then drops from the open end of the baffle plate into the oil pan where it is redirected forward. The baffles (S45) cast into the oil pan slow the circulation of the oil through the pan to enhance cooling.
Oil pickup occurs in the front compartment of the baffle where a passageway in the casting (S46) directs the flow upward.
Passing through a second passageway in the transmission housing (Q47), the flow of oil enters the lower passageway in the crankcase (A1) to repeat the circuit.
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