Engine Mechanical Specifications - LS1

2004 Oldsmobile Bravada AWDSECTION Engine Mechanical Specifications - LS1
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 - LS1

Application Specification
Metric English
General
  Engine Type V8
  Displacement 5.7L - 5665 cc 346 CID
  RPO LS1
  VIN G
  Bore 99.0 -99.018 mm 3.897-3.898 in
  Stroke 92.0 mm 3.622 in
  Compression Ratio 10.1:1
  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 9.235-9.245 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 0.22 mm of the Block Deck 0.22 mm 0.008 in
  Valve Lifter 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 7.13 mm 0.281 in
  Camshaft Lobe Lift - Intake 6.96 mm 0.274 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 - Production 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 mm 0.00078 in
  Crankshaft End Play 0.04-0.2 mm 0.0015-0.0078 in
  Crankshaft Main Bearing Clearance - Production 0.021-0.052 mm 0.0008-0.0021 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 in
  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 mm 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 - Production 0.23-0.44 mm 0.009-0.017 in
  Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service 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 - Service 0.44-0.76 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 +0.176 mm -0.0003 to +0.0069 in
  Piston Ring to Groove Clearance - Oil Control Ring - Service -0.008 to +0.176 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 0.9447-0.9488 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 11.79 mm 0.464 in
  Valves - Valve Lift - Exhaust 12.16 mm 0.479 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
  Rocker Arms - Valve Rocker Arm Ratio 1.70:1
  Valve Springs - Valve Spring Free Length 52.9 mm 2.08 in
  Valve Springs - Valve Spring Installed Height 45.75 mm 1.8 in
  Valve Springs - Valve Spring Load - Closed 340 N at 45.75 mm 76 lb at 1.8 in
  Valve Springs - Valve Spring Load - Open 980 N at 33.55 mm 220 lb at 1.32 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.