Engine Block - Back View

WARNING: This page is about a different car, the 2003 Saturn Ion 3, 2003 Saturn Ion 2, and 2003 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Block Thread Specifications - Back View

Courtesy of GENERAL MOTORS CORP.

Service Call Out	Thread Size	Insert	Drill	Counterbore Tool	Tap	Driver	Drill Depth (Maximum)		Tap Depth (Maximum)
J 42385-							MM	(IN)	MM	(IN)
1	M12 x 1.75	855	856	857	858	859	39	1.535	33.5	1.32
2	M16 x 1.5	860	861	862	863	864	21	0.827	15	0.59
3	M10 x 1.5	215	211	212	213	214	29	1.161	THRU
4	M8 x 1.25	210	206	207	208	209	18	0.709	THRU
5	M8 x 1.25	854 No Flange	206	207	208	209	18	0.709	THRU
6	M16 x 1.5	860	861	862	863	864	21	0.827	15	0.59
7	M12 x 1.75	855	856	857	858	859	39	1.535	33.5	1.32