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Engine Mechanical Specifications

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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
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