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Crank drive, cylinder block

Crank drive, cylinder block



1. Main bearing journal

2. Big-end journal

3. Main bearing journal (guide bearing)

4. Colour coding on crankshaft

5. Colour coding of bearing shells

6. Marking on bearing shells


Dimensions, crankshaft Ø Main bearing journal 1 - 5 Colour coding
Normal dimension, mm 54,980 - 54,997 brown
54,980 - 54,997 Green
undersize (0.25), mm 54,730 - 54,747 Brown/blue
54,730 - 54,747 Green/blue
undersize (0.50), mm 54,482 - 54,495 Brown/white
54,482 - 54,495 Green/white
Ø Big-end journal, 1 - 4
Normal dimension, mm 42,971 - 42,987 -
undersize (0.25), mm 42,721 - 42,737 Blue
undersize (0.50), mm 42,471 - 42,487 White
Width of main bearing journals 3 (guide bearing)
Normal dimension, mm 26,000 - 26,052 -
undersize (0.20), mm 26,200 - 26,252 -
undersize (0.40), mm 26,400 - 26,452 -


Crankshaft bearing, 1, 2, 4, 5 Upper big-end bearing shell Colour coding Thickness Designation GM 74, GM 985, GM 15
Normal dimension, mm brown 1,987 - 1,993 256 N
Green 1,993 - 1,999 257 N
undersize (0.25), mm Brown/blue 2,112 - 2,118 258 A
Green/blue 2,118 - 2,124 259 A
undersize (0.50), mm Brown/white 2,237 - 2,243 260 B
Green/white 2,243 - 2,249 261 B
Lower big-end bearing shell
Normal dimension, mm brown 1,987 - 1,993 256 N
Green 1,993 - 1,999 257 N
undersize (0.25), mm Brown/blue 2,112 - 2,118 258 A
Green/blue 2,118 - 2,124 259 A
undersize (0.50), mm Brown/white 2,237 -2,243 260 B
Green/white 2,243 - 2,249 261 B


Engine Z 18 XE
Permitted big-end bearing clearance, mm 0,005 - 0,059
Permitted crankshaft end float, mm 0,100 - 0,202
Permitted rotational deviation, mm 0,03
Crankshaft bearing 3 (guide bearing) Upper big-end bearing shell
Colour coding Thickness Designation GM 74, GM 985, GM 15
Normal dimension, mm brown 1,987 - 1,993 859 N
Green 1,993 - 1,999 860 N
undersize (0.25), mm Brown/blue 2,112 - 2,118 861 A
Green/blue 2,118 - 2,124 862 A
undersize (0.50), mm Brown/white 2,237 - 2,243 863 B
Green/white 2,243 - 2,249 864 B
Lower big-end bearing shell
Normal dimension, mm brown 1,987 - 1,993 859 N
Green 1,993 - 1,999 860 N
undersize (0.25), mm Brown/blue 2,112 - 2,118 861 A
Green/blue 2,118 - 2,124 862 A
undersize (0.50), mm Brown/white 2,237 -2,243 863 B
Green/white 2,243 - 2,249 864 B


Width of crankshaft bearing 3 (guide bearing) Colour coding Width Designation
Normal dimension, mm Brown/green 25,850 - 25,900 -
undersize (0.25), mm Brown/blue Green/blue 26,050 - 26,100 -
undersize (0.50), mm Brown/white Green/white 26,250 - 26,300 -


Big-end bearing lower big-end bearing shell
Colour coding Thickness Designation, GM 985.3
Normal dimension, mm - 1,485 - 1,497 264 N
undersize (0.25), mm Blue 1,610 - 1,622 265 A
undersize (0.50), mm White 1,735 - 1,747 266 B
Upper big-end bearing shell
Normal dimension, mm - 1,485 - 1,497 264 N
undersize (0.25), mm Blue 1,610 - 1,622 265 A
undersize (0.50), mm White 1,734 - 1,747 266 B
Permitted big-end bearing play mm 0,019 - 0,071