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Engine Block - Front View

Fig 1: Engine Block - Front View
GM698377Courtesy of GENERAL MOTORS CORP.
Engine Block - Front View

Service Hole Location Thread Size Drill Counterbore Tool Stop Collar Tap Driver Insert Drill Depth (Max) Tap Depth (Min)
- mm (in) mm (in)
1 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
2 6 x 1 201 202 n/a 203 204 205 18 0.709 14 0.551
3 6 x 1 201 202 n/a 203 204 205 22 0.866 18 0.709
4 6 x 1 201 202 n/a 203 204 205 22 0.866 18 0.709
5 6 x 1 201 202 n/a 203 204 205 22 0.866 18 0.709
6 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
7 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
8 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
9 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
10 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
11 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
12 6 x 1 201 202 n/a 203 204 205 22 0.866 18 0.709
13 6 x 1 201 202 n/a 203 204 205 22 0.866 18 0.709
14 6 x 1 201 202 n/a 203 204 205 22 0.866 18 0.709
15 6 x 1 201 202 n/a 203 204 205 30 1.182 26 1.024
16 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
17 16 x 1.5 405 n/a 407 203 204 205 24 0.945 16 0.630
18 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024
19 8 x 1.25 206 207 n/a 208 209 210 30 1.182 25 0.985
20 8 x 1.25 206 207 n/a 208 209 210 30 1.182 25 0.985
21 6 x 1 405 n/a 407 203 204 205 30 1.182 26 1.024