Checking the diametrical clearance between the bearings and the crankshaft journals (Opel Kadett E)

In case of hard rotation of the crankshaft or if there is any doubt about the correctness of the clearances in the main and connecting rod bearings, check the clearance between the liners and the crankshaft journals using a calibrated plastic wire of the PG 1 type. This clearance should be within 0.020-0.046 mm for the 1st main bearing, 0.010-0.036 mm for the 2nd and 0-0.315 mm for the 3rd main bearing, and 0.020-0.060 mm for the connecting rod bearings.

Soften a piece of plastic wire in hot water, wipe it dry and place it on the corresponding crankshaft journal.

Install the connecting rod with the cover or the main bearing cover on the journal being checked and tighten the mounting bolts or nuts to the specified torque, remove the cover and determine the gap size by the width of the flattened wire using the scale printed on the wire packaging.

Remove the wire and wipe the crankshaft journal with chamois leather.

Lubricate the crankshaft journals with engine oil and install the bearing caps in place, then tighten the bolts and nuts securing them to the specified torque.