Cylinder Block Assembly: Specifications
| Engine Block | Camshaft Bearing Bore Diameters | 2.168-2.169 inch |
| Engine Block Cylinder Head Deck Surface Flatness - Measured within a 152.4 mm (6.0 inch) area | 0.003 inch | |
| Engine Block Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck | 0.008 inch | |
| Engine Block Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face | 9 235-9.245 in. | |
| Main Bearing Bore Diameter - Production | 2.750-2.751 in. | |
| Main Bearing Bore Out-of-Round | 0.0002 in. | |
| Valve Lifter Bore Diameter - Production | 0.843-0.844 in. | |
| Engine block oil gallery plugs | 44 ft.lbs. | |
| General Data | Engine type | V8 |
| Displacement | 346 CID | |
| Regular production option (RPO) | LS1 | |
| Bore | 3.897-3.898 in. | |
| Stroke | 3.622 in. | |
| Compression ratio | 10.1:1 | |
| Connecting Rod | Connecting Rod Bearing Bore Diameter | 2.224-2.225 in. |
| Connecting Rod Bearing Bore Out-of-Round - Production | 0.00023 in. | |
| Connecting Rod Bearing Bore Out-of-Round - Service Limit | 0.00023 in. | |
| Connecting Rod Bearing Clearance - Production | 0.0009-0.0025 in. | |
| Connecting Rod Bearing Clearance - Service Limit | 0.0009-0.003 in. | |
| Connecting Rod Side Clearance | 0.00433-0.02 in. | |
| Crankshaft | Crankshaft Bearing Clearance - Production | 0.0008-0.0021 in. |
| Crankshaft Bearing Clearance - Service | 0.0008-0.0025 in. | |
| Crankshaft Connecting Rod Journal Diameter - Production | 2.0991-2.0999 in. | |
| Crankshaft Connecting Rod Journal Diameter- Service Limit | 2.0987 in. | |
| Crankshaft Connecting Rod Journal Taper - Production | 0.0002 in.- maximum for 1/2 of Journal Length | |
| Crankshaft Connecting Rod Journal Taper - Service Limit | 0.00078 in- maximum | |
| Crankshaft Connecting Rod Journal Out-of-Round - Production | 0.0002 in. | |
| Crankshaft Connecting Rod Journal Out-of-Round - Service Limit | 0.00039 in. | |
| Crankshaft End Play | 0.0015-0.0078 in. | |
| Crankshaft Main Journal Diameter- Production | 2.558-2.559 in. | |
| Crankshaft Main Journal Diameter - Service Limit | 2.558 in. - Minimum | |
| Crankshaft Main Journal Out-of-Round - Production | 0.000118 in. | |
| Crankshaft Main Journal Out-of-Round - Service Limit | 0.00031 in. | |
| Crankshaft Main Journal Taper - Production | 0.00039 in. | |
| Crankshaft Main Journal Taper - Service Limit | 0.00078 in. | |
| Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 inch) Below the Tooth Diameter | 0.028 in. | |
| Crankshaft Runout - at Rear Flange | 0.002 in. -maximum | |
| Crankshaft Thrust Wall Runout | 0.001 in. | |
| Crankshaft Thrust Wall Width - Production | 1.029-1.0315 in. | |
| Crankshaft Thrust Wall Width - Service | 1.0315 in.-maximum | |
| Cylinder Bore | Cylinder Bore Diameter | 3.897-3.898 inch |
| Cylinder Bore Taper Thrust Side | 0.0007 in. -maximum | |
| Cylinder Head | Cylinder Head Engine Block Deck Flatness - Measured within a 152.4 mm (6.0 inch) area | 0.003 in. |
| Cylinder Head Engine Block Deck Flatness - Measuring the Overall Length of the Cylinder Head | 0.004 in. | |
| Cylinder Head Exhaust Manifold Deck Flatness | 0.008 in. | |
| Cylinder Head Intake Manifold Deck Flatness | 0.008 in. | |
| Cylinder Head Height - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface | 4.732 in. - Minimum | |
| Piston | Piston Outside Diameter- Non Coated Skirt - at Size Point | 3.8964-3.897 in. |
| Piston Outside Diameter- Measured Over Coating - at Size Point | 3.897-3.899 in. | |
| Piston to Bore Clearance - Non Coated Skirt - Production | 0.0005-0.0019 in. | |
| Piston to Bore Clearance - Non Coated Skirt - Service | 0.0005-0.0029 in. | |
| Piston to Bore Clearance - Coated Skirt - Production | -0.001 to +0.0011 in. | |
| Piston to Bore Clearance - Coating Worn Off - Service | 0.0005-0.0029 in. | |
| Piston Pin | Piston Pin Piston Pin Clearance to Piston Bore - Production | 0.0004-0.00078 in. |
| Piston Pin Clearance to Piston Bore - Service Limit | 0.0004-0.00086 in. - Maximum | |
| Piston Pin Diameter | 0.9447-0.9448 in. | |
| Piston Pin Fit Connecting Rod | 0.00078-0.00169 in. - Interference | |
| Piston Rings | Piston Compression Ring End Gap - Production-Top - Measured in Cylinder Bore | 0.009-0.017 in. |
| Piston Compression Ring End Gap - Production-2nd - Measured in Cylinder Bore | 0.017-0.027 in. | |
| Piston Oil Ring End Gap - Production - Measured in cylider bore | 0.007-0.029 in. | |
| Piston Compression Ring End Gap - Service-Top - Measured in Cylinder Bore | 0.009-0.0196 in. maximum | |
| Piston Compression Ring End Gap - Service-2nd - Measured in Cylinder Bore | 0.0173-0.03 in. - Maximum | |
| Piston Oil Ring End Gap - Service Limit - Measured in Cylinder Bore | 0.007-0.032 in. - Maximum | |
| Piston Compression Ring Groove Clearance - Production-Top | 0.00157-0.0033 in. | |
| Piston Compression Ring Groove Clearance - Production-2nd | 0.002-0.0034 in. | |
| Piston Oil Ring Groove Clearance - Production | -0.0003 to +0.0069 in. | |
| Piston Compression Ring Groove Clearance - Service-Top | 0.00157-0.0033 in. - Maximum | |
| Piston Compression Ring Groove Clearance - Service-2nd | 0.002-0.0034 in. - Maximum | |
| Piston Oil Ring Groove Clearance - Service Limit | -0.0003 to +0.0069 in. - Maximum | |
| Bearing Cap Bolts and Studs (Inner Bolts) | First Pass | 15 ft. lbs. |
| Final Pass | 80° | |
| Bearing Cap Bolts and Studs (Outer Bolts) | First Pass | 15 ft. lbs. |
| Final Pass | 53° | |
| Bearing Cap Side Bolts Tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap. | 18 ft. lbs. | |
| Crankshaft Balancer Bolt (First Pass-New Bolt) | 37 ft. lbs. | |
| Crankshaft Balancer Bolt (Final Pass-New Bolt) | 140 degrees | |
| Crankshaft Balancer Bolt (Used Bolt) | 240 ft. lbs. |