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 half-
bearing, 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 half-
bearings 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 half-
bearings to be allocated to each bearing.
