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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1207 (ENGINE MECHANICAL - 5.7L)SPECIFICATIONSENGINE MECHANICAL SPECIFICATIONS - LS6
2004 Oldsmobile Bravada AWD
Engine Mechanical Specifications - LS6
2004 Oldsmobile Bravada AWDSECTION Engine Mechanical Specifications - LS6
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE MECHANICAL SPECIFICATIONS - LS6
| Application | Specification | ||
|---|---|---|---|
| Metric | English | ||
| General | |||
| Engine Type | V 8 | ||
| Displacement | 5.7 L - 5665 cc | 346 CID | |
| RPO | LS6 | ||
| VIN | S | ||
| Bore | 99.0-99.018 mm | 3.897-3.898 in | |
| Stroke | 92.0 mm | 3.622 in | |
| Compression Ratio | 10.5:1 | ||
| Firing Order | 1-8-7-2-6-5-4-3 | ||
| Spark Plug Gap | 1.524 mm | 0.06 in | |
| Block | |||
| Camshaft Bearing Bore Diameter | 55.063-55.088 mm | 2.168-2.169 in | |
| Crankshaft Main Bearing Bore Diameter | 69.871-69.889 mm | 2.75-2.751 in | |
| Crankshaft Main Bearing Bore Out-of-Round | 0.005 mm | 0.0002 in | |
| Cylinder Bore Diameter | 99.0-99.018 mm | 3.897-3.898 in | |
| Cylinder Bore Taper - Thrust Side | 0.018 mm | 0.0007 in | |
| Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face | 234.57-234.82 mm | 9.235-9245 in | |
| Cylinder Head Deck Surface Flatness - Measured Within a 152.4 mm (6.0 in) Area | 0.08 mm | 0.003 in | |
| Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck | 0.22 mm | 0.008 | |
| Valve Litter Bore Diameter | 21.417-21.443 mm | 0.843-0.844 in | |
| Camshaft | |||
| Camshaft End Play | 0.025-0.305 mm | 0.001-0.012 in | |
| Camshaft Journal Diameter | 54.99-55.04 mm | 2.164-2.166 in | |
| Camshaft Journal Out-of-Round | 0.025 mm | 0.001 in | |
| Camshaft Lobe Lift - Exhaust | 8.19 mm | 0.322 in | |
| Camshaft Lobe Lift - Intake | 8.24 mm | 0.324 in | |
| Camshaft Runout - Measured at the Intermediate Journals | 0.05 mm | 0.002 in | |
| Connecting Rod | |||
| Connecting Rod Bearing Clearance - Production | 0.023-0.065 mm | 0.0009-0.0025 in | |
| Connecting Rod Bearing Clearance - Service | 0.023-0.076 mm | 0.0009-0.003 in | |
| Connecting Rod Bore Diameter - Bearing End | 56.505-56.525 mm | 2.224-2.225 in | |
| Connecting Rod Bore Out-of-Round - Bearing End | 0.006 mm | 0.00023 in | |
| Connecting Rod Bore Out-of-Round - Bearing End - Service | 0.006 mm | 0.00023 in | |
| Connecting Rod Side Clearance | 0.11-0.51 mm | 0.00433-0.02 in | |
| Crankshaft | |||
| Connecting Rod Journal Diameter - Production | 53.318-53.338 mm | 2.0991-2.0999 in | |
| Connecting Rod Journal Diameter - Service | 53.308 mm | 2.0987 in | |
| Connecting Rod Journal Out-of-Round - Production | 0.005 mm | 0.0002 in | |
| Connecting Rod Journal Out-of-Round - Service | 0.01 mm | 0.0004 in | |
| Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production | 0.005 mm | 0.0002 in | |
| Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service | 0.02 | 0.0078 in | |
| Crankshaft End Play | 0.04-0.2 mm | 0.0015-0.0078 in | |
| Crankshaft Main Bearing Clearance - Production | 0.02-0.052 mm | 0.0006-0.0021 in | |
| Crankshaft Main Bearing Clearance - Service | 0.02-0.065 mm | 0.0008-0.0025 in | |
| Crankshaft Main Journal Diameter - Production | 64.993-65.007 mm | 2.558-2.559 in | |
| Crankshaft Main Journal Diameter - Service | 64.993 mm | 2.558 in | |
| Crankshaft Main Journal Out-of-Round - Production | 0.003 mm | 0.000118 in | |
| Crankshaft Main Journal Out-of-Round - Service | 0.008 mm | 0.0003 in | |
| Crankshaft Main Journal Taper - Production | 0.01 mm | 0.0004 in | |
| Crankshaft Main Journal Taper - Service | 0.02 mm | 0.00078 in | |
| Crankshaft Rear Flange Runout | 0.05 mm | 0.002 in | |
| Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter | 0.7 mm | 0.028 | |
| Crankshaft Thrust Surface - Production | 26.14-26.22 mm | 1.029-1.0315 in | |
| Crankshaft Thrust Surface - Service | 26.22 mm | 1.0315 in | |
| Crankshaft Thrust Surface Runout | 0.025 mm | 0.001 in | |
| Cylinder Head | |||
| Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface | 120.2 mm | 4.732 in | |
| Surface Flatness - Block Deck - Measured Within a 152.4 mm (6.0 in) Area | 0.08 mm | 0.003 in | |
| Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head | 0.1 | 0.004 in | |
| Surface Flatness - Exhaust Manifold Deck | 0.22 mm | 0.008 in | |
| Surface Flatness - Intake Manifold Deck | 0.22 mm | 0.008 in | |
| Intake Manifold | |||
| Surface Flatness - Measured at Gasket Sealing Surfaces | 0.5 mm | 0.02 in | |
| Lubrication System | |||
| Oil Capacity - with Filter | 6.151 Liters | 6.5 Quarts | |
| Oil Capacity - without Filter | 5.678 Liters | 6.0 Quarts | |
| Oil Pressure - Minimum - Hot | 41 kPa at 1,000 engine RPM | 6 psig at 1,000 engine RPM | |
| 124 kPa at 2,000 engine RPM | 18 psig at 2,000 engine RPM | ||
| 165 kPa at 4,000 engine RPM | 24 psig at 4,000 engine RPM | ||
| Oil Pan | |||
| Front Cover Alignment - at Oil Pan Surface | 0.0-0.5 mm | 0.0-0.02 in | |
| Rear Cover Alignment - at Oil Pan Surface | 0.0-0.5 mm | 0.0-0.02 in | |
| Oil Pan Alignment - to Rear of Engine Block at Transmission Bellhousing Mounting Surface | 0.0-0.25 mm | 0.0-0.01 in | |
| Piston Rings | |||
| Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Prodution | 0.23-0.44 mm | 0.009-0.017 in | |
| Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore | 0.23-0.5 mm | 0.009-0.0196 in | |
| Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production | 0.44-0.7 mm | 0.017-0.027 in | |
| Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore | 0.44-0.76 mm | 0.0173-0.03 in | |
| Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production | 0.18-0.75 mm | 0.007-0.029 in | |
| Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service | 0.18-0.81 mm | 0.007-0.032 in | |
| Piston Ring to Groove Clearance - First Compression Ring - Production | 0.04-0.086 mm | 0.00157-0.0033 in | |
| Piston Ring to Groove Clearance - First Compression Ring - Service | 0.04-0.068 mm | 0.00157-0.0033 in | |
| Piston Ring to Groove Clearance - Second Compression Ring - Production | 0.05-0.088 mm | 0.002-0.0034 in | |
| Piston Ring to Groove Clearance - Second Compression Ring - Service | 0.05-0.088 mm | 0.002-0.0034 in | |
| Piston Ring to Groove Clearance - Oil Control Ring - Production | -0.008 to +0.0176 mm | -0.0003 to +0.0069 in | |
| Piston Ring to Groove Clearance - Oil Control Ring - Service | -0.008 to +0.0176 mm | -0.0003 to +0.0069 in | |
| Pistons and Pins | |||
| Piston - Piston Diameter - Non Coated Skirt - at Size Point | 98.969-98.987 mm | 3.8964-3.8997 in | |
| Piston - Piston Diameter - Measured Over Coating - at Size Point | 99.989-99.027 mm | 3.897-3.899 in | |
| Piston - Piston to Bore Clearance - Non Coated Skirt - Production | 0.013-0.049 mm | 0.0005-0.0019 in | |
| Piston - Piston to Bore Clearance - Non Coated Skirt - Service | 0.013-0.074 mm | 0.0005-0.0029 in | |
| Piston - Piston to Bore Clearance - Coated Skirt - Production | -0.027 to +0.029 mm | -0.001 to +0.0011 in | |
| Piston - Piston to Bore Clearance - Coating Worn Off - Service | 0.013-0.074 mm | 0.0005-0.0029 in | |
| Pin - Piston Pin Fit in Connecting Rod Bore | 0.02-0.043 mm - Interference | 0.00078-0.00169 in - Interference | |
| Pin - Piston Pin Clearance to Piston Pin Bore - Production | 0.01-0.02 mm | 0.0004-0.00078 in | |
| Pin - Piston Pin Clearance to Piston Pin Bore - Service | 0.01-0.022 mm | 0.0004-0.00086 in | |
| Pin - Piston Pin Diameter | 23.997-24.0 mm | 0.9447-0.9448 in | |
| Valve System | |||
| Valves - Valve Face Angle | 45 degrees | ||
| Valves - Valve Face Width | 1.25 mm | 0.05 in | |
| Valves - Valve Lash | Net Lash - No Adjustment | ||
| Valves - Valve Lift - Intake | 14.02 mm | 0.552 in | |
| Valves - Valve Lift - Exhaust | 13.92 mm | 0.548 in | |
| Valves - Valve Seat Angle | 46 degrees | ||
| Valves - Valve Seat Runout | 0.05 mm | 0.002 in | |
| Valves - Valve Seat Width - Exhaust | 1.78 mm | 0.07 in | |
| Valves - Valve Seat Width - Intake | 1.02 mm | 0.04 in | |
| Valves - Valve Stem Diameter - Production | 7.955-7.976 mm | 0.313-0.314 in | |
| Valves - Valve Stem Diameter - Service | 7.96 mm | 0.314 in | |
| Valves - Valve Stem-to-Guide Clearance - Production - Intake | 0.025-0.066 mm | 0.001-0.0026 in | |
| Valves Valve Stem-to-Guide Clearance - Service - Intake | 0.093 mm | 0.0037 in | |
| Valves - Valve Stem-to-Guide Clearance - Production - Exhaust | 0.025-0.066 mm | 0.001-0.0026 in | |
| Valves - Valve Stem-to-Guide Clearance - Service - Exhaust | 0.093 mm | 0.0037 in | |
| Valve Rocker Arm - Valve Rocker Arm Ratio | 1.70:1 | ||
| Valve Springs - Valve Spring Free Length | 53.4 mm | 2.1 in | |
| Valve Springs - Valve Spring Installed Height | 45.75 mm | 1.8 in | |
| Valve Springs - Valve Spring Load - Closed | 400 N at 45.75 mm | 90 lb at 1.8 in | |
| Valve Springs - Valve Spring Load- Open | 1310 N at 31.75 mm | 294 lb at 1.25 in | |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.