Adhesives, Fluids, Lubricants, and Sealers (LDK, LHU)
| Application | Type of Material | GM Part Number |
| United States | Canada |
| No. 6 Intake Rear Camshaft Cap | Sealant | 12378521 | 88901148 |
| Balance Shaft Bearings | Engine Oil | 12345610 | 00993193 |
| Cam Lobes | Engine Oil | 12345610 | 00993193 |
| Crank Sensor O-ring | Engine Oil | 12345610 | 00993193 |
| Cylinder Bores | Engine Oil | 12345610 | 00993193 |
| Cylinder Head Plugs | Sealant | 12345382 | 10953489 |
| Engine Block Threaded Plugs | Sealant | 12346004 | 10953480 |
| Engine Block to Bedplate | Sealant | 12378521 | 88901148 |
| Engine Oil | 5W-30 SAE Engine Oil | 12345610 | 00993193 |
| Engine Oil | 5W-30 Dexos1 Engine Oil | 19293000 | 19386321 |
| Fuel Injector O-rings | Engine Oil | 12345610 | 00993193 |
| Fuel Injector Tip Insulators | Engine Oil | 12345610 | 00993193 |
| Hydraulic Lash Adjusters | Lubricant | 12345501 | 992704 |
| Intake and Exhaust Valve Stems | Lubricant | 12345501 | 992704 |
| Main Bearings | Lubricant | 12345501 | 992704 |
| Oil Filter Cap - Threads and O-ring Lead-in Chamfers | Engine Oil | 12345610 | 00993193 |
| Oil Level Indicator Tube O-ring | Lubricant | 12345501 | 992704 |
| Oil Pan to Bedplate Joint | Sealant | 12378521 or 90543772 | 88901148 |
| Oil Pump - Pump Elements | Engine Oil | 12345610 | 00993193 |
| Oxygen Sensor Threads | Anti-seize | 12397953 | |
| Piston Pin to Piston/Rod - Pin Bores of Piston and Rod | Engine Oil | 12345610 | 00993193 |
| Rod Bearings - Rod Pins of Crankshaft | Engine Oil | 12345610 | 00993193 |
| Thread Repair | Cutting Fluid | 1052864 | 992881 |
| Cleaning Tool | 12346139 | 10953463 |
| 12377981 |
| Timing Chain Guide Bolt Access Hole Plug | Sealant | 12345382 | 10953489 |
| Valves | Parts Immersion Solvent | 12345368 | 10953514 |
| Valve Rocker Arm/Valve Tip | Lubricant | 12345501 | 992704 |
| Water Feed Tube O-rings | Lubricant | 12345579 | 1974984 |
| Water Pump Drain Plug | Sealant | 12346004 | 10953480 |
Scheme 336
Scheme 336: Engine Block - Front View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 23.5 | 0.93 | 18.5 | 0.73 |
| 2 | M12 x 1.75 | 855 | 856 | 857 | 858 | 859 | 33.5 | 1.32 | 26.5 | 1.04 |
| 3 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 24.5 | 0.96 | 19.5 | 0.77 |
| 4 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20 | 0.787 | 16 | 0.63 |
ENGINE BLOCK SPECIFICATIONS (FRONT VIEW)
Scheme 337
Scheme 337: Engine Block - Back View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 24 | 0.945 | THRU |
| 2 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 29 | 1.161 | THRU |
| 3 | M12 x 1.75 | 855 | 856 | 857 | 858 | 859 | 39 | 1.535 | 33.5 | 1.32 |
| 4 | M16 x 1.5 | 860 | 861 | 862 | 863 | 864 | 21 | 0.827 | 15 | 0.59 |
ENGINE BLOCK SPECIFICATIONS (BACK VIEW)
Scheme 338
Scheme 338: Engine Block - Right Side View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 22.5 | 0.886 | 16 | 0.63 |
| 2 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 34 | 1.339 | 27 | 1.063 |
| 3 | M12 x 1.75 | 865 | 856 | 857 | 858 | 859 | 19.5 | 0.768 | 12.5 | 0.49 |
ENGINE BLOCK SPECIFICATIONS (RIGHT SIDE VIEW)
Scheme 339
Scheme 339: Engine Block - Bottom View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 28 | 1.102 | 22 | 0.87 |
| 2 | M10 x 1.5 | 514 | 511 | N/A | 512 | 513 | 60 | 2.362 | 53.5 | 2.11 |
ENGINE BLOCK SPECIFICATIONS (BOTTOM VIEW)
Scheme 340
Scheme 340: Engine Block - Left Side View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20.5 | 0.807 | 16.5 | 0.65 |
| 2 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 23.5 | 0.925 | 18 | 0.71 |
| 3 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 30.5 | 1.201 | 22.5 | 0.89 |
| 4 | M12 x 1.75 | 865 | 856 | 857 | 858 | 859 | 15.5 | 0.61 | 12.5 | 0.49 |
| 5 | M12 x 1.75 | 865 | 856 | 857 | 858 | 859 | 19.5 | 0.778 | 12.5 | 0.49 |
ENGINE BLOCK SPECIFICATIONS (LEFT SIDE VIEW)
Scheme 341
Scheme 341: Engine Block - Top View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 23.5 | 0.925 | 18.5 | 0.73 |
| 2 | M11 x 1.5 | 507 | 504 | N/A | 505 | 506 | 77.5 | 3.053 | 70 | 2.758 |
| 3 | M12 x 1.75 | 865 | 856 | 857 | 858 | 859 | 13.5 | 0.531 | 12.5 | 0.49 |
ENGINE BLOCK SPECIFICATIONS (TOP VIEW)
Scheme 342
Scheme 342: Lower Crankcase - Front View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 23.5 | 0.925 | 18.5 | 0.73 |
| 2 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 30.5 | 1.201 | 25.5 | 1.00 |
LOWER CRANKCASE SPECIFICATIONS (FRONT VIEW)
Scheme 343
Scheme 343: Lower Crankcase - Back View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 29.5 | 1.161 | THRU |
LOWER CRANKCASE SPECIFICATIONS (BACK VIEW)
Scheme 344
Scheme 344: Lower Crankcase - Bottom View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 23.5 | 0.925 | 18.5 | 0.73 |
LOWER CRANKCASE SPECIFICATIONS (BOTTOM VIEW)
Scheme 345
Scheme 345: Lower Crankcase - Right View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 34 | 1.339 | 27 | 1.063 |
LOWER CRANKCASE SPECIFICATIONS (RIGHT VIEW)
Scheme 346
Scheme 346: Lower Crankcase - Left View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 211 | 212 | 213 | 214 | 34 | 1.339 | 27 | 1.063 |
LOWER CRANKCASE SPECIFICATIONS (LEFT VIEW)
Scheme 347
Scheme 347: Cylinder Head - Top View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M6 x 1 | 205 | 852 | N/A | 203 | 204 | 23 | 0.906 | 19 | 0.748 |
| 2 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20 | 0.787 | 16 | 0.63 |
| 3 | M14 x 1.75 | 856 | 857 | N/A | 858 | 859 | THRU | THRU |
| 4 | M8 x 1.25 | 854 | 853 | N/A | 208 | 209 | 30 | 1.182 | 27 | 1.063 |
CYLINDER HEAD SPECIFICATIONS (TOP VIEW)
Scheme 348
Scheme 348: Cylinder Head - Intake Manifold Deck View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20 | 0.787 | 16 | 0.63 |
| 2 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 20 | 0.787 | 16 | 0.63 |
| 3 | M8 x 1.25 | 205 | 201 | 202 | 203 | 204 | 16 | 0.630 | 12 | 0.473 |
CYLINDER HEAD SPECIFICATIONS (INTAKE MANIFOLD DECK VIEW)
Scheme 349
Scheme 349: Cylinder Head - Exhaust Manifold Deck View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20 | 0.78 | 16 | 0.63 |
| 2 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 25 | 0.984 | 20 | 0.78 |
CYLINDER HEAD (EXHAUST MANIFOLD DECK VIEW)
Scheme 350
Scheme 350: Cylinder Head - Front View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20 | 0.787 | 16 | 0.63 |
| 2 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 25 | 0.984 | 20 | 0.787 |
CYLINDER HEAD (FRONT VIEW)
Scheme 351
Scheme 351: Cylinder Head - Back View
| Service Call Out | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth Maximum | Tap Depth Maximum |
| J 42385-850 | MM | IN | MM | IN |
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 25 | 0.984 | 20 | 0.787 |
| 2 | M12 x 1.75 | 865 | 856 | 857 | 858 | 859 | 18 | 0.709 | 14 | 0.551 |
| 3 | M6 x 1 | 205 | 201 | 202 | 203 | 204 | 20 | 0.787 | 16 | 0.63 |
CYLINDER HEAD SPECIFICATIONS (BACK VIEW)