ZEST/BOLT

277 / 1232

ENGINE 1.3 QUADRAJET (75PS)
52
27.Fit the calibrated wire (1) (plastic gage) for
measuring the bearing clearance.
16.Check that there are no deposits or blockages in
the crankshaft lubrication ducts.
17 Check that the diameter of the main journals
corresponds to the recommended figures.
Main journal diameter - Category A (mm) 50.994 ~ 51.000
Main journal diameter - Category B (mm) 50.988 ~ 50.994
Main journal diameter - Category C (mm) 50.982 ~ 50.988
the diameter of the main journals is not within
the specified limits, they should be reground to
the recommended undersize of 0.127mm.
Main journal diameter undersize (mm) 0.127
NOTE :
The crankpin undersize should not be higher than the
specified values as it will adversely affect the structural
resistance of the crankshaft (following contact between
the tool and rolled connectors). As far as the above is
concerned, if the regrinding requires an undersize
greater than 0.127 mm, then the crankshaft must be
replaced with a new one. For an undersize of more
than 0.127mm, only the half bearings should never
be replaced, even if it is available for purchase.
19 Check that the diameter of the crankpins
corresponds to the recommended figures.
Crankpin diameter - Category A (mm) 42.591 ~ 42.600
Crankpin diameter - Category B (mm) 42.582 ~ 42.591
the diameter of the crankpins is not correct, they
should be reground to the recommended undersize
of 0.127 mm.
Crankpin diameter undersize (mm) 0.127
21.Check the crankshaft and connecting rod bearings,
having in mind that no adjustment operations should
be carried out on the half-bearings. Replace them
if scoring or signs of binding are noted.
22.The size of the main journal half-bearings is given.
Main journal half-bearings -
Category A (red) (mm) 1.836 ~ 1.841
Main journal half-bearings -
Category B (blue) (mm) 1.841 ~ 1.846
Main journal half-bearings -
Category C (yellow) (mm) 1.846 ~ 1.851
Main journal half-bearings thickness oversize (mm) 0.127
23.The size of the connecting rod half-bearings is given.
Crankpin half-bearings -
Category A (red) (mm) 1.546 ~ 1.552
Crankpin half-bearings -
Category B (blue) (mm) 1.550 ~ 1.556
Connecting rod half-bearing thickness
oversize (mm) 0.127
24.Place the upper main bearing halves in their seats
taking great care over cleanliness.
NOTE :
Half-bearings of different categories may be fitted to
the same journal to reduce the clearance. In the above
case, observe the following installation requirements:
Fit the thickest half-bearing to the main bearing cap
and the thinnest to the crankcase.
If the crankshaft has been ground, fit new oversize
half-bearings to restore the initial tolerance conditions.
The thrust half-rings are built into the central main
bearing half.
25.The thrust half-ring thickness should be within the
specified limits of 2.310 mm ~ 2.360 mm.
NOTE :
The thrust half-washer undersize is 0.127 mm.
26 Fit the crankshaf t into it s seat on the upper
crankcase.