Engine Block - Top/Bottom Views

WARNING: This page is about a different variant/trim than selected.

Courtesy of GENERAL MOTORS COMPANY

Hole	Thread Size	Insert	Drill	Counterbore Tool	Tap	Driver	Drill Depth - Maximum mm (in)	Tap Depth - Maximum mm (in)
J-42385-
1	M6 x 1.0	63	201	202	203	204	23.0 (0.907)	23.0 (0.907)
2	M8 x 1.25	61	206	207	208	209	29.0 (1.14)	29.0 (1.14)
3	M8 x 1.25	210	206	207	208	209	23.0 (0.907)	23.0 (0.907)
4	M10 x 2.0	104	101	N/A	102	103	30.0 (1.18)	30.0 (1.18)
5	M10 x 2.0	104	101	N/A	102	103	52.0 (2.05)	52.0 (2.05)
6	M10 x 1.5	N/A	N/A	N/A	N/A	N/A	34.0 (1.35)	34.0 (1.35)
Bolt hole 4 has a 1.5 mm (0.059 in) counterbore included in the 30.0 mm (1.18 in) drill depth. Use sleeve J-42385-316 with the drill tap. For the proper hardware and procedure, refer to Thread Repair . Bolt hole 5 has a 15.5 mm (0.807 in) counterbore included in the 52.0 mm (2.05 in) drill depth. For the proper hardware and procedure, refer to Thread Repair .