Specifications
Inspecting the crankshaft components
Check the surfaces of the main journals; if they are
scored or oval-shaped, reface them (observing the
undersize charts), and replace the main bushing/
s.
Reference (1) indicates the position where the col-
oured reference is applied to select diameter (B).
Reference (2) indicates the position where the col-
oured reference is applied to select balancing.
CRANKSHAFT SEAT (TIMING SYSTEM SIDE)
Specification Desc./Quantity
Diameter of crankshaft main journal, timing system side 37.975 - 37.959 mm (1.49507 - 1.49444 in)
Inside diameter of crankshaft bushing, timing system side 38.016 - 38.0 mm (1.49669 - 1.49606 in)
Clearance between bushing and main journal (timing system
side)
0.025 - 0.057 mm (0.00098 - 0.00224 in)
CRANKSHAFT SEAT ( CLUTCH SIDE)
Specification
Desc./Quantity
Diameter of crankshaft main journal, clutch side 53.97 - 53.961 mm (2.12480 - 2.12444 in)
Inside diameter of crankshaft bushing on clutch-side flange 54.019 - 54.0 mm (2.12673 - 2.12598 in)
Clearance between bushing and main journal (clutch side) 0.030 - 0.058 mm (0.00118 - 0.00228 in)
CRANKPIN DIAMETER (B)
Specification
Desc./Quantity
'Blue' bushing half-shell regular production 44.008 ÷ 44.014 mm (1.73259 ÷ 1.73283 in)
'Red' bushing half-shell regular production 44.014 ÷ 44.020 mm (1.73283 ÷ 1.73307 in)
BALANCING SELECTION COLOURS (2)
Specification
Desc./Quantity
Crankshaft selection colour (2) brown Type 1 to be used with brown connecting rods.
Balance with a 1558 g (54.96 oz) +/- 0.25% weight fitted on the
crankpin (B). Maximum imbalance allowed for each shoulder:
2 g (0.07 oz).
Crankshaft selection colour (2) green Type 2 to be used with green connecting rods.
Balance with a 1575 g (55.56 oz) +/- 0.25% weight fitted on the
crankpin (B). Maximum imbalance allowed for each shoulder:
2 g (0.07 oz).
Crankshaft selection colour (2) black Type 2 to be used with black connecting rods.
Balance with a 1592 g (56.16 oz) +/- 0.25% weight fitted on the
crankpin (B). Maximum imbalance allowed for each shoulder:
2 g (0.07 oz).
Checking the connecting rod
When examining the connecting rods, check that:
•
Bushing conditions and bushings-pins clearance;
•
Shaft parallelism;
•
Connecting rod bearings.
These are thin shell bearings, anti-friction alloy that does not allow for any adaptation; replace them
immediately if seizing or wear marks are found.
GRISO 8V - 1200 Engine
ENG - 157
Revente Interdite - Revendita Vietata - Resaling Forbiden - Wiederverkauf Verboten