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1.05L REVOTORQ ENGINE
66
Stage
Cylinder block case main bearing
bore diameter with bearing shell (mm)
Crankshaft main bearing journal
diameter (mm)
Standard
50.026 / 50.066
49.991-50.000
Standard 1
49.926 / 49.966
49.982-49.990
Repair 1
Repair 2
Stage
Width of 4
th
main bearing journal
(mm)
4
th
main bearing thrust washer
thickness (mm)
Standard
24.000 / 24.052
2.52 (2.50 - 2.55)
Standard 1
24.100 / 24.152
2.57 (2.55 -2.60)
Repair 1
24.200 / 24.252
2.62 (2.60 - 2.65)
Maintenance Limit
End play of crank shaft
0.06 – 0.245 mm
Fillet radius of main bearing journals
2.5 – 0.5 mm
Fillet radius of crank pin journals
2.5 – 0.5 mm
Width of 1st, 2nd, 3rd, 4th, and 5th main bearing journals
24.000 + 0.2 mm
Width of crank pin journals
24.000 + 0.2 mm
Maximum permissible cylindricity
0.005
Sphericity of main bearing journal
0.0025
Maximum permissible sphericity of crank pin
0.005
Maximum permissible run out of 2nd, 3rd and 4th main bearing journals when
supported at 1st and 5th main bearing journals
0.02
Maximum permissible out of parallelism between crank pin and main bearing journal
axis
0.01
Pre-tension of main bearing shells
0.010 – 0.040 mm
Hardness of crank shaft main bearing and crank pin journals
56 ± 3 HRC
Main bearing parent bore diameter in crank case
A grade = 53.800 - 53.809
C grade = 53.810 -53.818
Maximum permissible taper of main bearing parent bore
0.005
Maximum permissible sphericity of main bearing parent bore
0.03
Crank shaft journal to main bearing clearance
0.022 - 0.047