SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 144 (ENGINE MECHANICAL - 4.3L)SPECIFICATIONSENGINE MECHANICAL SPECIFICATIONS
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Engine Mechanical Specifications

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Engine Mechanical Specifications
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. 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 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 0.025 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
  Camshaft Runout 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 0.005 mm 0.0002 in
  Connecting Rod Journal Out-of-Round - Service 0.025 mm 0.0010 in
  Connecting Rod Journal Taper - Production 0.00508 mm 0.00030 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 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 166kPa 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 Grooce 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
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.