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Spotting the oil squirter hole in the main bearing bulkhead can take practice. The oil squirter itself is installed in a drilled passage underneath the main bearing insert. With the insert in place as it is here, the oil squirter is not visible, as it's buried in the bulkhead at approximately 8 o'clock to the bearing. The small groove in the bearing insert that feeds oil to the squirter is visible. Looking closely at the edge of the bulkhead, just before it reaches the cylinder bore and a little lower than the breather hole is a small slit. That slit is an angled passage from which the piston squirter shoots.