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Engine Mechanical Specifications

Engine Mechanical Specifications

Application Specification
Metric English
General
  • Engine Type
 90 degree V6
  • Displacement
 4.3 L 262 CID
  • RPO
 LU3
  • VIN
 X
  • Bore
 101.60 mm 4.012 in
  • Stroke
 88.39 mm 3.480 in
  • Compression Ratio
 9.2:1
  • Firing Order
 		 1-6-5-4-3-2
  • Spark Plug Gap
 1.52 mm 0.060 in
Balance Shaft
  • Bearing Journal Diameter - Rear
 38.085-38.100 mm 1.4994-1.500 in
  • Bushing Bore Diameter - Rear
 0.050-0.088 mm 0.0020-0.0035 in
Block
  • Crankshaft Main Bearing Bore Out-of-Round
 0.050 mm 0.002 in
  • Cylinder Bore Diameter
 101.618-101.643 mm 4.0007-4.0017 in
  • Cylinder Bore Out-of-Round - Production
 0.017 mm 0.0007 in
  • Cylinder Bore Out-of-Round - Service
 0.05 mm 0.002 in
  • Cylinder Bore Taper - Production Relief Side
 0.025 mm 0.0010 in
  • Cylinder Bore Taper - Production Thrust Side
 0.012 mm 0.0005 in
  • Cylinder Bore Taper - Service
 0.025 mm 0.0010 in
  • Cylinder Head Deck Surface Flatness
 0.050-0.152 mm 0.002-0.006 in
Camshaft
  • Camshaft End Play
 0.0254-0.2286 mm 0.0010-0.0090 in
  • Camshaft Journal Diameter
 47.440-47.490 mm 1.8677-1.8696 in
  • Camshaft Journal Out-of-Round
 0.008 mm 0.0003 in
  • Camshaft Lobe Lift - Exhaust
 7.0953 mm 0.2793 in
  • Camshaft Lobe Lift - Intake
 6.8678 mm 0.2704 in
  • Camshaft Runout
 0.100 mm 0.0039 in
Connecting Rod
  • Connecting Rod Bearing Clearance - Production
 0.038-0.078 mm 0.0015-0.0031 in
  • Connecting Rod Bearing Clearance - Service
 0.025-0.063 mm 0.0010-0.0025 in
  • Connecting Rod Side Clearance
 0.15-0.44 mm 0.006-0.017 in
Crankshaft
  • Connecting Rod Journal Diameter
 57.116-57.148 mm 2.2487-2.2497 in
  • Connecting Rod Journal Out-of-Round - Production
 0.008 mm 0.0003 in
  • Connecting Rod Journal Out-of-Round - Service
 0.025 mm 0.0010 in
  • Connecting Rod Journal Taper - Production
 0.010 mm 0.0004 in
  • Connecting Rod Journal Taper - Service
 0.025 mm 0.0010 in
  • Crankshaft End Play
 0.050-0.20 mm 0.002-0.008 in
  • Crankshaft Main Bearing Clearance #1 - Production
 0.02-0.05 mm 0.0008-0.0020 in
  • Crankshaft Main Bearing Clearance #2, #3, and #4 - Production
 0.028-0.058 mm 0.0011-0.0023 in
  • Crankshaft Main Bearing Clearance #1 - Service
 0.0254-0.05 mm 0.0010-0.0020 in
  • Crankshaft Main Bearing Clearance #2, #3, and #4 - Service
 0.025-0.063 mm 0.0010-0.0025 in
  • Crankshaft Main Journal Diameter #1
 62.199-62.217 mm 2.4488-2.4495 in
  • Crankshaft Main Journal Diameter #2 and #3
 62.191-62.215 mm 2.4485-2.4494 in
  • Crankshaft Main Journal Diameter #4
 62.179-62.203 mm 2.4480-2.4489 in
  • Crankshaft Main Journal Out-of-Round - Production
 0.005 mm 0.0002 in
  • Crankshaft Main Journal Out-of-Round - Service
 0.025 mm 0.0010 in
  • Crankshaft Main Journal Taper
 0.007 mm 0.0003 in
Exhaust Manifold
  • Surface Flatness - Flange to Flange
 0.25 mm 0.010 in
  • Surface Flatness - Individual Flange
 0.05 mm 0.002 in
Intake Manifold
  • Surface Flatness
 0.10 mm 0.004 in
Lubrication System
  • Oil Capacity for C/K, G/H with Filter
 4.3 L 4.5 qt
  • Oil Capacity for C/K, G/H without Filter
 3.8 L 4 qt
  • Oil Capacity for S/T, M/L with Filter
 4.7 L 5 qt
  • Oil Capacity for S/T, M/L without Filter
 4.3 L 4.5 qt
  • Oil Pressure - at 1,000 RPM
 42 kPa 6 psi
  • Oil Pressure - at 2,000 RPM
 125 kPa 18 psi
  • Oil Pressure - at 4,000 RPM
 166 kPa 24 psi
Piston Rings
  • Piston Ring End Gap - First Compression Ring - Production
 0.25-0.40 mm 0.010-0.016 in
  • Piston Ring End Gap - Second Compression Ring - Production
 0.38-0.58 mm 0.015-0.023 in
  • Piston Ring End Gap - Oil Control Ring - Production
 0.25-0.76 mm 0.010-0.029 in
  • Piston Ring End Gap - First Compression Ring - Service
 0.25-0.50 mm 0.010-0.020 in
  • Piston Ring End Gap - Second Compression Ring - Service
 0.38-0.80 mm 0.015-0.031 in
  • Piston Ring End Gap - Oil Control Ring - Service
 0.005-0.090 mm 0.0002-0.0035 in
  • Piston Ring to Groove Clearance - First Compression Ring - Production
 0.030-0.070 mm 0.0012-0.0027 in
  • Piston Ring to Groove Clearance - Second Compression Ring - Production
 0.076-0.280 mm 0.0030-0.0110 in
  • Piston Ring to Groove Clearance - Oil Control Ring - Production
 0.046-0.196 mm 0.0018-0.0077 in
  • Piston Ring to Groove Clearance - First Compression Ring - Service
 0.030-0.085 mm 0.0012-0.0033 in
  • Piston Ring to Groove Clearance - Second Compression Ring - Service
 0.030-0.085 mm 0.0012-0.0033 in
  • Piston Ring to Groove Clearance - Oil Control Ring - Service
 0.076-0.200 mm 0.0030-0.0079 in
Pistons and Pins
  • Piston - Piston to Bore Clearance - Production
 0.018-0.061 mm 0.0007-0.0024 in
  • Piston - Piston to Bore Clearance - Service
 0.075 mm 0.0029 in
  • Pin - Piston Pin Clearance to Connecting Rod Bore - Press Fit
 0.012-0.048 mm 0.0005-0.0019 in
  • Pin - Piston Pin Clearance to Piston Pin Bore - Production
 0.013-0.023 mm 0.0005-0.0009 in
  • Pin - Piston Pin Clearance to Piston Pin Bore - Service
 0.025 mm 0.0010 in
  • Pin - Piston Pin Diameter
 23.545-23.548 mm 0.9270-0.9271 in
Valve System
  • Valves - Valve Face Angle
 45 degrees
  • Valves - Valve Seat Angle
 46 degrees
  • Valves - Valve Seat Runout
 0.05 mm 0.002 in
  • Valves - Valve Seat Width - Intake
 1.016-1.651 mm 0.040-0.065 in
  • Valves - Valve Seat Width - Exhaust
 1.651-2.489 mm 0.065-0.098 in
  • Valves - Valve Stem Oil Seal Installed Height
 1-2 mm 0.03937-0.07874 in
  • Valves - Valve Stem-to-Guide Clearance - Intake - Production
 0.025-0.069 mm 0.0010-0.0027 in
  • Valves - Valve Stem-to-Guide Clearance - Intake - Service
 0.025-0.094 mm 0.0010-0.0037 in
  • Valves - Valve Stem-to-Guide Clearance - Exhaust - Production
 0.025-0.069 mm 0.0010-0.0027 in
  • Valves - Valve Stem-to-Guide Clearance - Exhaust - Service
 0.025-0.094 mm 0.0010-0.0037 in
  • Rocker Arms - Valve Rocker Arm Ratio
 1.5:1
  • Valve Springs - Valve Spring Free Length
 51.3 mm 2.02 in
  • Valve Springs - Valve Spring Installed Height - Intake
 42.92-43.43 mm 1.670-1.700 in
  • Valve Springs - Valve Spring Installed Height - Exhaust
 42.92-43.43 mm 1.670-1.700 in
  • Valve Springs - Valve Spring Load - Closed
 338-374 N @ 43.2 mm 76-84 lb @ 1.70 in
  • Valve Springs - Valve Spring Load - Open
 832-903 N @ 32.3 mm 187-203 lb @ 1.27 in
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