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Cylinder Head- Top View

WARNING: This page is about a different variant/trim than selected.
Fig 1: Cylinder Head - Top View
GM2074496Courtesy of GENERAL MOTORS COMPANY
Cylinder Head- Top View

Service Call Out Thread Size Insert Drill Counterbore Tool Tap Driver Drill Depth
Maximum
Tap Depth
Maximum
J 42385-850 MM IN MM IN
1 M6 x 1 205 852 N/A 203 204 23 0.906 19 0.748
2 M6 x 1 205 201 202 203 204 20 0.787 16 0.63
3 M14 x 1.75 856 857 N/A 858 859 THRU THRU
4 M8 x 1.25 854 853 N/A 208 209 30 1.182 27 1.063