WARNING: This page is about a different car, the 2018 Nissan NV3500 HD, 2018 Nissan NV2500 HD, and 2018 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
Measure the outer diameter of crankshaft main journals with micrometer.
Standard
: 69.951 - 69.975 mm (2.7540 - 2.7549 in) diameter.
If out of the standard, measure the main bearing oil clearance. Then use undersize bearing.