ENGINE 1.3L QUADRAJET (90PS) 63 ALLOCATION OF HALF-BEARINGS TO MAIN JOURNALS: Having defined the grade for each crankshaft bearing (to which a specific diameter corresponds according to the grade), it is necessary to select the pair of bearings which are the same colour. This is designed to guarantee the optimum operational clearances for all the bearings. Main journal grade Diameter Paint Mark grade A (normal) 51.000 ~ 50.994 mm RED paint mark grade B (normal), 50.994 ~ 50.988 mm BLUE paint mark grade C (normal), 50.988 ~ 50.982 mm YELLOW paint mark grade AM (0.127 undersize) 50.873 ~ 50.867mm BROWN paint mark grade BM (0.127 undersize) 50.867 ~ 50.861mm, GREEN paint mark grade CM (0.127 undersize) 50.861 ~ 50.855mm BLACK paint mark Minimum Maximum 0.025 mm 0.052 mm Lastly, we wish to point out that, generally, the clearance between the main journal and the halfbearing, obtained through the selection method indicated above, should be within the following values: This value can be measured, as a final check, using the calibrated wire (plastic gage). CLASSIFICATION OF CRANKPINS AND ALLOCATION OF HALF-BEARINGS The procedure described for the main journal halfbearings should also be carried out for selecting the crankpin half-bearings. Crank pin grade Diameter Paint Mark grade A (normal) 42.600 - 42.5914 mm RED paint mark grade B (normal), 42.591 - 42.582 mm, BLUE paint mark grade AM (0.127 undersize) 42.473 - 42.464 mm BROWN paint mark grade BM (0.127 undersize) 42.464 - 42.455 mm GREEN paint mark By way of example, if the alphabetical code identified is the one indicated by reference 1 in the diagram, i.e. - BBBB, this means that the four crankpins are all Grade B (to which a specific diameter belongs) and are therefore ready for the fitting of half-bearings with a blue coloured paint mark on the edge. The first letter on the left - B of the alphabetical code is always related to the first timing side crankpin. Refer to the instructions above for the pair of halfbearings to be allocated to each bearing.
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