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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1764 (ENGINE MECHANICAL - 4.2L)SPECIFICATIONSENGINE MECHANICAL SPECIFICATIONS
2004 Oldsmobile Bravada AWD

Engine Mechanical Specifications

2004 Oldsmobile Bravada AWDSECTION Engine Mechanical Specifications
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Isuzu Ascender, 2005 GMC Envoy XUV, 2005 GMC Envoy XL, 2005 GMC Envoy, and 2005 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Engine Mechanical Specifications

Application Specification
Metric English
General
  • Engine Type
 In-Line-6
  • Displacement
 4.2L 256 cu in
  • RPO
 LL8
  • VIN
 "S"
  • Bore
 93 mm 3.66 in
  • Stroke
 102 mm 4.02 in
  • Compression Ratio
 10:1
  • Engine Compression Test
 1482 kPa 215 psi
  • Firing Order
 1-5-3-6-2-4
  • Spark Plug Gap
 1.07 mm 0.042 in
Block
  • Crankshaft Main Bearing Bore Diameter
 78.070-78.088 mm 3.0760-3.0766 in
  • Cylinder Bore Diameter
 92.990-93.006 mm 3.6638-3.6644 in
  • Cylinder Bore Out-of-Round
 0.013 mm 0.0005 in
  • Cylinder Head Deck Surface Flatness
 0.08 mm 0.003 in
  • Cylinder Liner Recession
 0.015 mm 0.0006 in
Camshaft
  • Camshaft End Play - Exhaust
 0.045-0.215 mm 0.0017-0.0084 in
  • Camshaft End Play - Intake
 0.051-0.201 mm 0.0020-0.0079 in
  • Camshaft Journal Diameter - All Intake and Exhaust #2-#7
 26.936-26.960 mm 1.0612-1.0622 in
  • Camshaft Journal Diameter - Exhaust #1
 29.936-29.960 mm 1.1794-1.1804 in
  • Camshaft Journal to Bore Clearance
 0.040-0.085 mm 0.0015-0.0033 in
Connecting Rod
  • Connecting Rod Bearing Clearance
 0.021-0.065 mm 0.0008-0.0025 in
  • Connecting Rod Bore Diameter - Bearing End
 60.322-60.338 mm 2.3749-2.3755 in
  • Connecting Rod Bore Out-of-Round - Bearing End
 0.005 mm 0.0002 in
Connecting Rod Side Clearance 0.05-0.35 mm 0.0019-0.0137 in
Crankshaft
  • Crankshaft End Play
 0.112-0.388 mm 0.0044-0.0153 in
  • Crankshaft Main Bearing Clearance
 0.012-0.064 mm 0.0004-0.0025 in
  • Crankshaft Main Journal Diameter
 69.968-69.984 mm 2.7567-2.7574 in
  • Crankshaft Main Journal Out-of-Round
 0.005 mm 0.0002 in
  • Crankshaft Main Journal Taper
 0.005 mm 0.0002 in
Cylinder Head
  • Surface Flatness - Block Deck
 0.08 mm 0.003 in
  • Surface Flatness - Exhaust Manifold Deck
 0.08 mm 0.003 in
  • Surface Flatness - Intake Manifold Deck
 0.08 mm 0.003 in
Exhaust Manifold
  • Surface Flatness
 0.08 mm 0.003 in
Lubrication System
  • Oil Capacity - with Filter
 6.6 L 7.0 qts
  • Oil Capacity - without Filter
 6.1 L 6.5 qts
  • Oil Pressure - Minimum
 85 kPa 12 psi @ 1200 RPM
Oil Pump
  • Gear Diameter - Drive
 73.415-73.370 mm 2.893-2.891 in
  • Gear Diameter - Driven
 87-86.975 mm 3.428-3.426 in
  • Gear Pocket - Depth
 15.609-15.584 mm 0.615-0.614 in
  • Gear Pocket - Diameter
 87.065-87.040 mm 3.430-3.429 in
  • Gear Thickness - Drive
 15.546-15.521 mm 0.613-0.611 in
  • Gear Thickness - Driven
 15.360-15.511 mm 0.605-0.611 in
  • Lobe Inner Diameter - Maximum
 11.9 mm 0.469 in
  • Relief Valve-to-Bore Clearance
 2.57-1.63 mm 0.101-0.064 in
Piston Rings
  • Piston Ring End Gap - First Compression Ring
 0.15-0.3 mm 0.0059-0.0118 in
  • Piston Ring End Gap - Second Compression Ring
 0.36-0.51 mm 0.0142-0.0201 in
  • Piston Ring End Gap - Oil Control Ring
 0.250-0.760 mm 0.0098-0.0299 in
  • Piston Ring to Groove Clearance - First Compression Ring
 0.043-0.093 mm 0.0017-0.0037 in
  • Piston Ring to Groove Clearance - Second Compression Ring
 0.043-0.093 mm 0.0017-0.0037 in
  • Piston Ring to Groove Clearance - Oil Control Ring
 0.059-0.215 mm 0.0023-0.0085 in
Pistons and Pins
  • Piston - Piston Diameter
 92.971-93.005 mm 3.6603-3.6616 in
  • Piston - Piston Pin Bore Diameter
 23.002-23.008 mm 0.9056-0.9058 in
  • Piston - Piston to Bore Clearance
 -0.015-0.035 mm -0.0006-0.0014 in
  • Pin - Piston Pin Clearance to Connecting Rod Bore
 0.001-0.018 mm 0.0004-0.0007 in
  • Pin - Piston Pin Clearance to Piston Pin Bore
 0.003-0.012 mm 0.00012-0.0005 in
  • Pin - Piston Pin Diameter
 22.996-22.999 mm 0.9054-0.9055 in
Valve System
  • Valves - Valve Face Runout
 0.038 mm 0.0015 in
  • Valves - Valve Seat Runout
 0.05 mm 0.002 in
  • Valves - Valve Stem-to-Guide Clearance - Exhaust
 0.0375-0.0775 mm 0.0015-0.0030 in
  • Valves - Valve Stem-to-Guide Clearance - Intake
 0.030-0.065 mm 0.0011-0.0025 in
  • Valve Springs - Valve Spring Load - Closed
 211.4-233.4 N @ 35 mm 47.5-52.5 lb @ 1.701 in
  • Valve Springs - Valve Spring Load - Open
 579-631 N @ 24.5 mm 130-142 lb @ 1.260 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.