FixVault

Cylinder Head - Back View

Fig 1: Identifying Bolt Size & Locations On Cylinder Head - Back
GM1825030Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Back 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 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