Cylinder Head - Intake Manifold Deck View

Fig 1: Cylinder Head - Intake Manifold Deck View

Courtesy of GENERAL MOTORS CORP.

Cylinder Head - Intake Manifold Deck View

Service Hole Location	Thread Size	Drill	Counterbore Tool	Stop Collar	Tap	Driver	Insert	Drill Depth (Max)		Tap Depth (Min)
J 42385-400  . See Special Tools .								mm	(in)	mm	(in)
1	M 10 x 1.5	211	212	n/a	213	214	420	33	1.3	27	1.063
2	M 10 x 1.5	211	212	n/a	213	214	215	28	1.103	22	0.866
3	M 6 x 1	201	202	n/a	203	204	205	23	0.906	18	0.709