Engine Tolerance Specifications
Engine Type 90 degree V6Displacement 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 with Filter 4.3 L (4.5 qt)
Oil Capacity without Filter 3.8 L (4 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.)