Cylinder Head - Exhaust Manifold Deck View

WARNING: This page is about a different car, the 2004 Saturn Ion 3, 2004 Saturn Ion 2, and 2004 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Cylinder Head Thread Specifications - Exhaust Manifold Deck 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	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
2	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
3	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
4	M27 x 2.0	N/A	N/A	N/A	N/A	N/A	THRU		12	0.78
5	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
6	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
7	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
8	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
9	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
10	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
11	M6 x 1.0	205	201	202	203	204	20	0.78	16	0.630
12	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
13	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78
14	M8 x 1.25	210	206	207	208	209	25	0.984	20	0.78