Measuring Oil Clearance

Check for oil clearance by measuring the outside diameter of the crankshaft journal and the inside diameter of the bearing. The clearance can be obtained by calculating the difference between the measured outside diameters.

Standard value 

Oil clearance

Crankshaft main bearing :

0.004 ~ 0.022 mm (0.00015 ~ 0.00087 in.)

Connecting rod bearing :

0.018 - 0.036 mm (0.00071 - 0.00141 in.)

Limit : 0.1 mm (0.004in.)

Fig 1: Measuring Outside Diameter Of Crankshaft Journal

Courtesy of HYUNDAI MOTOR CO.