Crankshaft Out-Of-Round And Taper

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

Measure the dimensions at four different points as shown in the figure below, on each main journal and pin journal with a micrometer.
Out-of-round is indicated by the difference in the dimensions between (d) and (c) at (a) and (b).
Taper is indicated by the difference in the dimensions between.

Fig 1: Identifying Crankshaft Out-Of-Round And Taper Measurement Points
Courtesy of NISSAN NORTH AMERICA, INC.

Out-of-round (Difference between "c" and "d"): Refer to "CYLINDER BLOCK ".

Taper (Difference between "a" and "b")
If the measured value exceeds the limit, correct or replace crankshaft.
If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then select the main bearing and/or connecting rod bearing. Refer to "MAIN BEARING " and/or "CONNECTING ROD BEARING ".