FixVault

Cylinder Head - Back View

WARNING: This page is about a different car, the 2005 Saturn Ion 3, 2005 Saturn Ion 2, and 2005 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Cylinder Head Threads Specifications - Back View
GM1492398Courtesy 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 17 0.67 14 0.551