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Cylinder Head - Back View

Fig 1: Cylinder Head -- Back View
GM2716773Courtesy 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
EN42385 MM IN MM IN
1 M6X1 205 201 202 203 204 20 0.787 16 0.63
2 M6X1 205 701 none 203 204 20 0.787 16 0.63
3 M8x1.25 181213 206 207 208 209 29.0 1.14 29.0 1.14
4 M12x1.75 865 856 857 858 859 18 0.709 14 0.551