Cylinder Head - End - Rear View

Fig 1: Cylinder Head - End - Rear View

Courtesy of GENERAL MOTORS CORP.

Cylinder Head - End - Rear 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 14 x 1.5	409	410	n/a	411	412	413	36	1.418	28	1.103
2	M 10 x 1.5	409	410	n/a	411	412	413	28	1.103	22	0.866
3	M 14 x 1.5	211	212	n/a	213	214	215	36	1.418	28	1.103
4	M 10 x 1.5	211	212	n/a	213	214	215	28	1.103	22	0.866