FixVault

Cylinder Head - Bottom View

Fig 1: Identifying Bolt Size & Locations On Cylinder Head - Bottom
GM1492399Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Bottom 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 M12 x 1.75 865 856 857 858 859 17 0.67 14 0.551