Engine Block - Back View

WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Block Thread Specification - 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