Cylinder Head - Intake Manifold Deck View

Fig 1: Cylinder Head - Intake 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	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
2	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
3	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
4	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
5	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
6	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
7	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
8	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630
9	M6 x 1.0	205	201	202	203	204	20	0.787	16	0.630