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1.2L REVOTRON ENGINE
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MAIN BEARING SHELL SELECTION TABLE (REVOTRON 1.2L)
SELECTION
ID
MB BORE GRADE
CRANK JOURNAL
DIAMETER
BEARING
1
M
E
Blue
2
M
D
Red
3
N
E
Red
4
N
D
Yellow
SELECTION
ID
CRANK PIN
BEARING
CON ROD
GRADE
DIAMETER
COLOUR
THICKNESS
1
G
41.982 – 41.991
BLUE
1.490 – 1.495
45H6
2
H
41.991 – 42.000
RED
1.485 – 1.490
Maintenance Limit (REVOTRON 1.2L)
End play of crank shaft
0.1 - 0.3 mm
Fillet radius of main bearing journals
1.25
+0.1
mm
Fillet radius of crank pin journals
1.25
+0.1
mm
Width of 1st, 2
nd
& 4th, and 3rd main bearing journals
24.0
+ 0.2
mm
Width of crank pin journals
20.7
+ 0.2
mm
Maximum permissible cylindricity
0.008 mm
Sphericity of main bearing journal
0.005 mm
Maximum permissible sphericity of crank pin
0.005 mm
Maximum permissible run out of 2
nd
and 3rd main bearing journals when supported
at 1st and 4th main bearing journals
0.01 mm
Maximum permissible out of parallelism between crank pin and main bearing journal
axis
0.01 mm
Pre-tension of main bearing shells
0.100 - 0.130 mm
Hardness of crank shaft main bearing and crank pin journals
Main bearing parent bore diameter in crank case
52
+ 0.019
mm
Maximum permissible taper of main bearing parent bore
0.005 mm
Maximum permissible sphericity of main bearing parent bore
0.005 mm
Crank shaft journal to main bearing clearance
0.013 / 0.046 mm