oil clearances

What Is A Typical Main Bearing Clearance Specification? The factory specs include 2.450-inch main bearing journals and 2.100-inch rod journals, which means the target bearing clearance should be about 0.0024-inch (0.0025 is the common spec) on main bearings and 0.0021-inch on the rod bearings. When bearing oil clearances are too large? However, too large a