Engine Mechanical Specifications
| 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 | |
| Firing order | 1-8-7-2-6-5-4-3 | |
| Spark plug gap | 0.06 in. | |
| Lubrication System | Oil capacity-without oil filter change | 5.0 quarts |
| Oil capacity-with filter change | 5.5 quarts | |
| Oil pressure-minimum-hot | 6 psig at 1,000 engine RPM | |
| 18 psig at 2,000 engine RPM | ||
| 24 psig at 4,000 engine RPM | ||
| Oil type | 5W-30 | |
| Camshaft | Camshaft End Play | 0.001-0.012 inch |
| Camshaft Journal Diameter | 2.164-2.166 inch | |
| Camshaft Journal Diameter Out-of-Round | 0.001 in. | |
| Camshaft Lobe Lift- Intake | 0.274 in. | |
| Camshaft Lobe Lift - Exhaust | 0.281 in. | |
| Camshaft Runout - Measured at the Intermediate Journals | 0.002 in. | |
| 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 | |
| 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. | |
| Intake manifold | Intake manifold cylinder head deck flatness- measured at gasket sealing surfaces | 0.02 in. |
| Oil pan and front/Rear cover alignment | Oil Pan to Rear of Engine Block Alignment - at Transmission Bellhousing Mounting Surface | 0.0-0.01 in. - Maximum |
| Front Cover Alignment - at Oil Pan Surface | 0.0-0.02 in. | |
| Rear Cover Alignment - at Oil Pan Surface | 0.0 0.02 in. | |
| 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 | |
| Valve System | Valve Face Angle | 45 degree |
| Valve Guide Installed Height - Measured from the Cylinder Head Spring Seat Surface to the Top of the Valve Guide | 0.682 in | |
| Valve Lash | Net Lash-No Adjustment | |
| Valve Lift - Exhaust | 0.4787 in. | |
| Valve Lift - Intake | 0.464 in. | |
| Valve Lifter | Hydraulic Roller | |
| Valve Margin | 0.05 in. - Minimum | |
| Valve Rocker Arm Ratio | 1.70:1 | |
| Valve Seat Angle | 46 degrees | |
| Valve Seat Runout | 0.002 in. - Maximum | |
| Valve Seat Width - Intake | 0.04 in. | |
| Valve Seat Width - Exhaust | 0.07 in. | |
| Valve Spring Free Length | 2.08 in. | |
| Valve Spring Installed Height - Intake | 1.8 in. | |
| Valve Spring Installed Height - Exhaust | 1.8 in. | |
| Valve Spring Pressure - Closed | 76 lb. at 1.8 in. | |
| Valve Spring Pressure - Open | 220 lb at 1.32 in. | |
| Valve Stem Clearance - Production - Exhaust | 0.001-0.0026 in. | |
| Valve Stem Clearance - Production - Intake | 0.001-0.0026 in. | |
| Valve Stem Clearance - Service - Exhaust | 0.0037 in. - Maximum | |
| Valve Stem Clearance - Service - Intake | 0.0037 in. - Maximum | |
| Valve Stem Diameter - Production | 0.313-0.314 in. | |
| Valve Stem Diameter- Service | 0.313 inch - Minimum | |
| Valve Stem Oil Seal Installed Height - Measured from the Valve Spring Shim to the Top Edge of Seal Body - First Design Seal | 0.712-0.752 in. |