Application 
 | Specification 
 | 
Metric 
 | English 
 | 
General 
 | 
| 
 | 90 degree V6 
 | 
| 
 | 4.3 L 
 | 262 CID 
 | 
| 
 | LU3 
 | 
| 
 | X 
 | 
| 
 | 101.60 mm 
 | 4.012 in 
 | 
| 
 | 88.39 mm 
 | 3.480 in 
 | 
| 
 | 9.2:1 
 | 
| 
 | 1-6-5-4-3-2 
 | 
| 
 | 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 
 | 
| 
 | 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 
 | 
| 
 | 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
 
 
 | 0.025 mm 
 | 0.001 in 
 | 
- Camshaft Lobe Lift - Exhaust
 
 
 | 7.20-7.30 mm 
 | 0.283-0.287 in 
 | 
- Camshaft Lobe Lift - Intake
 
 
 | 6.97-7.07 mm 
 | 0.274-0.278 in 
 | 
| 
 | 0.065 mm 
 | 0.0026 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 
 | 
| 
 | 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 
 | 
| 
 | 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 
 |