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Cylinder Head- Back View

Fig 1: Locating Bolts On Cylinder Head - Back View
GM2201824Courtesy of GENERAL MOTORS COMPANY
Cylinder Head- Back View

Service Call Out Thread Size Insert Drill Counterbore Tool Tap Driver Drill Depth
Maximum
Tap Depth
Maximum
EN 42385-850 MM IN MM IN
1 M8 x 1.25 210 206 207 208 209 25 0.984 20 0.787
2 M12 x 1.75 865 856 857 858 859 18 0.709 14 0.551
3 M6 x 1 205 201 202 203 204 20 0.787 16 0.63