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Thread Repair Specifications

WARNING: This page is about a different variant/trim than selected.
Fig 1: View Of Left Cylinder Head Camshaft Cover Face
GM915922Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Camshaft Cover Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.0 0.7087
2 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
3 M6 x 1.0 701 N/A N/A 203 204 205 28.5 1.1220 24.0 0.9449
4 M20 x 1.5 715 716 N/A 717 718 719 25.0 0.9842 17.0 0.6693
Fig 2: Identifying Left Cylinder Head Front Face
GM915924Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Front Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 THRU THRU
2 M12 x 1.75 856 857 N/A 858 859 416 40.0 1.5748 32.5 1.2795
3 M8 x 1.25 206 207 N/A 208 209 210 18.0 0.7087 22.5 0.8858
Fig 3: View Of Left Cylinder Head Intake Face
GM915927Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Intake Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
Fig 4: View Of Left Cylinder Head Exhaust Face
GM915932Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Exhaust Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3189 27.0 1.0630
2 M12 x 1.5 705 706 N/A 707 708 709 27.5 1.0827 13.0 0.5118
3 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.0 0.0000
4 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
Fig 5: Identifying Left Cylinder Head Rear Face
GM915951Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Rear Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3189 27.0 1.0630
Fig 6: View Of Right Cylinder Head Camshaft Cover Face
GM915963Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Camshaft Cover Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
2 M6 x 1.0 701 N/A N/A 203 204 205 28.5 1.1220 24.0 0.9449
3 M20 x 1.5 715 716 N/A 717 718 719 25.0 0.9842 17.0 0.6693
4 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.0 0.7087
Fig 7: View Of Right Cylinder Head Front Face
GM915968Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Front Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 THRU THRU
2 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8880 18.0 0.7087
3 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
4 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
5 M12 x 1.75 856 857 N/A 858 859 416 40.0 1.5748 32.5 1.2795
Fig 8: Identifying Right Cylinder Head Intake Face
GM915974Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Intake Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
Fig 9: Identifying Right Cylinder Head Exhaust Face
GM915998Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Exhaust Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.0 0.0000
2 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3189 27.0 1.0630
3 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
Fig 10: View Of Right Cylinder Head Rear Face
GM916091Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Rear Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3189 27.0 1.0630
Fig 11: View Of Front Of Engine Block
GM1887832Courtesy of GENERAL MOTORS CORP.
Engine Block Front

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
2 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3189 27.0 1.0630
3 M8 x 1.25 206 207 N/A 208 209 210 THRU 23.0 0.9055
4 M8 x 1.25 206 207 N/A 208 209 210 THRU THRU
5 M10 x 1.5 211 212 N/A 213 214 215 28.0 1.1024 28.0 1.1024
6 M10 x 1.5 211 212 N/A 213 214 215 THRU 20.0 0.7874
7 M10 x 1.5 211 212 N/A 213 214 215 THRU 28.0 1.1024
Fig 12: View Of Engine Block Left Side
GM916127Courtesy of GENERAL MOTORS CORP.
Engine Block Left Side

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
2 M20 x 1.5 715 716 N/A 717 718 719 30.0 1.1810 20.0 0.7874
3 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3190 27.0 1.0630
4 M14 x 1.5 409 410 N/A 411 412 735 THRU 15.0 0.5905
5 M8 x 1.25 206 207 N/A 208 209 415 16.5 0.6496 11.0 0.4331
Fig 13: View Of Engine Block Right Side
GM1876512Courtesy of GENERAL MOTORS CORP.
Engine Block Right Side

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.0 0.7087
2 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
3 M14 x 1.5 409 410 N/A 411 412 735 THRU 15.0 0.5905
4 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3190 27.0 1.0630
Fig 14: Engine Block Rear Component View
GM916134Courtesy of GENERAL MOTORS CORP.
Engine Block Rear

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 33.5 1.3190 27.0 1.0630
2 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.0 0.7087
3 M14 x 1.5 409 410 N/A 411 412 735 THRU 15.0 0.5905
4 M10 x 1.5 211 212 N/A 213 214 216 39.5 1.5551 33.0 1.2992
5 M10 x 1.5 211 212 N/A 213 214 420 THRU THRU
Fig 15: View Of Engine Block Bottom
GM916146Courtesy of GENERAL MOTORS CORP.
Engine Block Bottom

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 2.0 720 N/A N/A 721 722 104 56.0 2.2047 49.0 1.9291
2 M8 x 1.25 702 N/A N/A 703 704 620 46.0 1.8110 40.5 1.5945
3 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
4 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
Fig 16: Engine Block Left Deck Face Component View
GM1855096Courtesy of GENERAL MOTORS CORP.
Engine Block Left Deck Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
2 M11 x 2.0 723 N/A N/A 724 725 108 102.5 4.0354 94.0 3.7008
Fig 17: View Of Engine Block Right Deck Face
GM1887833Courtesy of GENERAL MOTORS CORP.
Engine Block Right Deck Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M11 x 2.0 723 N/A N/A 724 725 108 102.5 4.0354 94.0 3.7008
Fig 18: Identifying Engine Front Cover
GM916649Courtesy of GENERAL MOTORS CORP.
Engine Front Cover

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
2 M6 x 1.0 201 202 N/A 203 204 205 21.5 0.8465 18.0 0.7087
3 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
4 M10 x 1.5 211 212 N/A 213 214 420 THRU THRU
5 M10 x 1.5 211 212 N/A 213 214 420 33.5 1.3189 27.0 1.0630
6 M8 x 1.25 206 207 N/A 208 209 210 27.5 1.0827 23.0 0.9055
Fig 19: Upper Intake Manifold - Top View
GM916833Courtesy of GENERAL MOTORS CORP.
Upper Intake Manifold - Top

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
Fig 20: Upper Intake Manifold - Front View
GM916859Courtesy of GENERAL MOTORS CORP.
Upper Intake Manifold - Front

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
Fig 21: Upper Intake Manifold - Rear View
GM916863Courtesy of GENERAL MOTORS CORP.
Upper Intake Manifold - Rear

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
Fig 22: Lower Intake Manifold - Top View
GM916915Courtesy of GENERAL MOTORS CORP.
Lower Intake Manifold - Top

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
2 M8 x 1.25 206 207 N/A 208 209 210 THRU THRU
Fig 23: Oil Pan Front View
GM1658730Courtesy of GENERAL MOTORS CORP.
Oil Pan Front

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 33.5 1.3189 27.0 1.0630
2 M8 x 1.25 206 207 N/A 208 209 210 28.5 1.1220 23.0 0.9055
3 M8 x 1.25 610 N/A N/A 208 209 620 37.5 1.4764 32.0 1.2598
Fig 24: View Of Oil Pan Left Side
GM1888423Courtesy of GENERAL MOTORS CORP.
Oil Pan Left Side

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 33.5 1.3189 27.0 1.0630
2 M12 x 1.75 856 857 N/A 858 859 416 Thru Thru
Fig 25: View Of Oil Pan Right Side
GM1888425Courtesy of GENERAL MOTORS CORP.
Oil Pan Right Side

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 N/A N/A N/A N/A N/A N/A N/A N/A N/A
Fig 26: View Of Oil Pan Rear
GM1658736Courtesy of GENERAL MOTORS CORP.
Oil Pan Rear

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 33.5 1.3189 27.0 1.0630
Fig 27: View Of Oil Pan Bottom
GM1658738Courtesy of GENERAL MOTORS CORP.
Oil Pan Bottom

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 33.5 1.3189 27.0 1.0630
Fig 28: View Of Oil Pan Top
GM916826Courtesy of GENERAL MOTORS CORP.
Oil Pan Top

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 701 N/A N/A 203 204 205 28.0 1.1024 23.5 0.9252
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