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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 4.3L (LV1)) >> Specifications >> Engine Mechanical Specifications (LV1)

Engine Mechanical Specifications (LV1)

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Application Specification
Metric English
General
  • Engine Type
 V6
  • Displacement
 4.3L 262 CID
  • RPO
 LV1
  • VIN
 P
  • Bore
 99.6 mm 3.92 in
  • Stroke
 92.0 mm 3.622 in
  • Compression Ratio
 11.0:1
  • Firing Order
 1 - 6 - 5 - 4 - 3 - 2
  • Spark Plug Gap
 0.95 - 1.10 mm 0.037 - 0.043 in
Balance Shaft
  • Balance Shaft Endplay
 0.025 - 0.305 mm 0.0010 - 0.0120 in
  • Balance Shaft Journal Diameter - Rear
 49.990 - 50.010 mm 1.9681 - 1.9689 in
  • Balance Shaft Journal Diameter - Front
 56.990 - 57.010 mm 2.2437 - 2.2445 in
  • Balance Shaft Journal to Bearing Clearance
 0.045 - 0.110 mm 0.0018 - 0.0043 in
Block
  • Camshaft Bearing Bore 1 and 3 Diameter
 59.08 - 59.13 mm 2.325 - 2.327 in
  • Camshaft Bearing Bore 2 and 4 Diameter
 58.58 - 58.63 mm 2.306 - 2.308 in
  • Crankshaft Main Bearing Bore Diameter
 69.870 - 69.890 mm 2.75 - 2.751 in
  • Crankshaft Main Bearing Bore Out-of-Round
 0.008 mm 0.0003 in
  • Cylinder Bore Diameter
 99.590 - 99.610 mm 3.920 - 3.921 in
  • Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face
 234.58 - 234.832 mm 9.235 - 9.245 in
  • Cylinder Head Deck Surface Flatness - Measured Within a 25 mm (.984 in) Area
 0.025 mm 0.0009 in
  • Cylinder Head Deck Surface Flatness - Measured between bolt holes
 0.03 mm 0.001 in
  • Cylinder Head Deck Surface Flatness - Measured Within a 150 mm (5.90 in) Area
 0.05 mm 0.001 in
  • Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck
 0.1 mm 0.003 in
  • Valve Lifter Bore Diameter
 21.417 - 21.443 mm 0.843 - 0.844 in
Camshaft
  • Camshaft End Play
 0.025 - 0.305 mm 0.001 - 0.012 in
  • Camshaft Journal Diameter
 54.99 - 55.015 mm 2.164 - 2.166 in
  • Camshaft Bearing Diameter
 55.063 - 55.088 mm 2.1678 - 2.1688 in
  • Camshaft Journal-to-Bearing Clearance
 0.048 - 0.098 mm 0.0002 - 0.0038 in
  • Camshaft Journal Out-of-Round
 0.06 mm 0.0002 in
  • Camshaft Lobe Lift - Exhaust
 6.97 mm 0.274 in
  • Camshaft Lobe Lift - Intake
 7.08 mm 0.278 in
  • Camshaft Lobe Lift - Fuel Pump
 5.70 mm 0.224 in
  • Camshaft Runout - Measured at the Intermediate Journals
 0.05 mm 0.002 in
Camshaft Position Actuator
  • Range of Authority
 62 degrees
  • Park Position
 7 degrees Advanced
Connecting Rod
  • Connecting Rod Bearing Clearance - Production
 0.024 - 0.064 mm 0.0009 - 0.0025 in
  • Connecting Rod Bearing Clearance - Service
 0.024 - 0.075 mm 0.0009 - 0.003 in
  • Connecting Rod Bore Diameter - Bearing End
 56.505 - 56.525 mm 2.224 - 2.225 in
  • Connecting Rod Bore Out-of-Round - Bearing End - Production
 0.004 - 0.008 mm 0.00157 - 0.00314 in
  • Connecting Rod Bore Out-of-Round - Bearing End - Service
 0.004 - 0.008 mm 0.00157 - 0.00314 in
  • Connecting Rod Side Clearance
 0.170 - 0.430 mm 0.0067 - 0.017 in
Crankshaft
  • Connecting Rod Journal Diameter - Production
 53.320 - 53.336 mm 2.0991 - 2.0999 in
  • Connecting Rod Journal Diameter - Service
 53.31 mm 2.0987 in
  • Connecting Rod Journal Out-of-Round - Production
 0.005 mm 0.0002 in
  • Connecting Rod Journal Out-of-Round - Service
 0.01 mm 0.0004 in
  • Connecting Rod Journal Diametrical Taper - Maximum for 1/2 of Journal Length - Production
 0.008 mm 0.0003 in
  • Connecting Rod Journal Diametrical Taper - Maximum for 1/2 of Journal Length - Service
 0.015 mm 0.00059 in
  • Crankshaft End Play
 0.040 - 0.220 mm 0.0015 - 0.0086 in
  • Crankshaft Main Bearing Clearance - Production
 0.02 - 0.052 mm 0.0008 - 0.0021 in
  • Crankshaft Main Bearing Clearance - Service
 0.02 - 0.065 mm 0.0008 - 0.0025 in
  • Crankshaft Main Journal Diameter - Production
 64.992 - 65.008 mm 2.558 - 2.559 in
  • Crankshaft Main Journal Diameter - Service
 64.982 mm 2.558 in
  • Crankshaft Main Journal Out-of-Round - Production
 0.005 mm 0.00019 in
  • Crankshaft Main Journal Out-of-Round - Service
 0.001 mm 0.00003 in
  • Crankshaft Main Journal Diametrical Taper - Production
 0.008 mm 0.0003 in
  • Crankshaft Main Journal Diametrical Taper - Service
 0.015 mm 0.0006 in
  • Crankshaft Rear Flange Runout
 0.025 mm 0.00098 in
  • Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter
 0.7 mm 0.028 in
  • Crankshaft Thrust Surface - Production
 26.14 - 26.22 mm 1.029 - 1.0315 in
  • Crankshaft Thrust Surface - Service
 26.22 mm 1.0315 in
  • Crankshaft Thrust Surface Runout
 0.04 mm 0.0016 in
Cylinder Head
  • Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface
 132.5 mm 5.216 in
  • Surface Flatness - Block Deck - Measured Within a 152.4 mm (6.0 in) Area
 0.05 mm 0.0019 in
  • Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head
 0.1 mm 0.004 in
  • Surface Flatness - Exhaust Manifold Deck Face
 0.1 mm 0.004 in
  • Surface Flatness - Intake Manifold Deck Face
 0.1 mm 0.004 in
  • Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide
 17.05 - 17.55 mm 0.671 - 0.691 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 - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings
 0.3 mm 0.118 in
Lubrication System
  • Oil Pressure - Minimum - Hot
 152 kPa at 1, 000 engine RPM
207 kPa at 2, 000 engine RPM
228 kPa at 3, 000 engine RPM		 22 psig at 1, 000 engine RPM
30 psig at 2, 000 engine RPM
33 psig at 3, 000 engine RPM
Oil Pan
  • Front Cover Alignment - at Oil Pan Surface
 0.0 - 0.5 mm 0.0 - 0.02 in
  • Crankshaft Rear Oil Seal Housing Alignment - at Oil Pan Surface
 0.0 - 0.5 mm 0.0 - 0.02 in
  • Oil Pan Alignment - to Rear of Engine Block at Transmission Bell Housing Mounting Surface
 0.0 - 0.1 mm 0.0 - 0.004 in
Piston Rings
  • Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production
 0.20 - 0.36 mm 0.008 - 0.014 in
  • Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service
 0.20 - 0.42 mm 0.008 - 0.016 in
  • Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production
 0.37 - 0.63 mm 0.015 - 0.025 in
  • Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service
 0.37 - 0.69 mm 0.015 - 0.027 in
  • Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production
 0.15 - 0.73 mm 0.006 - 0.029 in
  • Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service
 0.15 - 0.79 mm 0.006 - 0.031 in
  • Piston Ring-to-Groove Clearance - First Compression Ring - Production
 0.04 - 0.083 mm 0.0016 - 0.0033 in
  • Piston Ring-to-Groove Clearance - First Compression Ring - Service
 0.04 - 0.083 mm 0.0016 - 0.0033 in
  • Piston Ring-to-Groove Clearance - Second Compression Ring - Production
 0.04 - 0.083 mm 0.0016 - 0.0033 in
  • Piston Ring-to-Groove Clearance - Second Compression Ring - Service
 0.04 - 0.083 mm 0.0016 - 0.0033 in
  • Piston Ring-to-Groove Clearance - Oil Control Ring - Production
 0.013 - 0.201 mm 0.0005 - 0.0079 in
  • Piston Ring-to-Groove Clearance - Oil Control Ring - Service
 0.013 - 0.201 mm 0.0005 - 0.0079 in
Pistons and Pins
  • Pin - Piston Pin Clearance-to-Piston Pin Bore - Production
 0.002 - 0.010 mm 0.0001 - 0.0004 in
  • Pin - Piston Pin Clearance-to-Piston Pin Bore - Service
 0.002 - 0.015 mm 0.0001 - 0.0006 in
  • Pin - Piston Pin Diameter
 23.952 - 23.955 mm 0.9430 - 0.9431 in
  • Pin - Piston Pin Fit in Connecting Rod Bore - Production
 0.007 - 0.020 mm 0.00028 - 0.00079 in
  • Pin - Piston Pin Fit in Connecting Rod Bore - Service
 0.007 - 0.022 mm 0.00028 - 0.00087 in
  • Piston - Piston Diameter - Measured Over Skirt Coating
 99.608 - 99.639 mm 3.9216 - 3.9228 in
  • Piston - Piston-to-Bore Clearance - Production
 -0.048 to +0.001 mm -0.0019 to +0.000 in
  • Piston - Piston-to-Bore Clearance - Service Limit with Skirt Coating Worn Off
 0.052 mm 0.0020 in
Valve System
  • Valves - Valve Face Angle
 45 degrees
  • Valves - Valve Face Width
 1.25 mm 0.05 in
  • Valves - Valve Lash
 Net Lash - No Adjustment
  • Valve Lift - Exhaust Non AFM
 12.5 mm 0.492 in
  • Valve Lift - Exhaust AFM
 12.753 mm 0.502 in
  • Valve Lift - Intake Non AFM
 12.700 mm 0.499 in
  • Valve Lift - Intake AFM
 12.953 mm 0.509 in
  • Valves - Valve Seat Angle
 45 degrees
  • Valves - Valve Seat Runout - Production
 0.05 mm 0.002 in
  • Valves - Valve Seat Runout - Service
 0.08 mm 0.003 in
  • Valves - Valve Seat Width - Exhaust
 2.52 mm 0.099 in
  • Valves - Valve Seat Width - Intake
 2.00 mm 0.078 in
  • Valves - Valve Stem Diameter - Production
 7.956 - 7.976 mm 0.313 - 0.314 in
  • Valves - Valve Stem Diameter - Service
 7.95 mm 0.313 in
NOTE:

For valve stem to guide clearance - valve guide inner diameter measurements must be recorded at a depth of 7 mm (0.26 in) in the valve guide bore.
  • Valves - Valve Stem-to-Guide Clearance - Production - Exhaust
 0.025 - 0.066 mm 0.001 - 0.0026 in
  • Valves - Valve Stem-to-Guide Clearance - Service - Exhaust
 0.093 mm 0.0037 in
  • Valves - Valve Stem-to-Guide Clearance - Production - Intake
 0.025 - 0.066 mm 0.001 - 0.0026 in
  • Valves - Valve Stem-to-Guide Clearance - Service - Intake
 0.093 mm 0.0037 in
  • Valves - Valve Stem Height - Measured from Spring Seat - Intake and Exhaust
 51.715 - 52.465 mm 2.036 - 2.065 in
  • Rocker Arms - Valve Rocker Arm Ratio
 1.80:1
  • Valve Springs - Valve Spring Free Length
 57.0 mm 2.24 in
  • Valve Springs - Valve Spring Installed Height
 47.75 mm 1.88 in
  • Valve Springs - Valve Spring Load - Closed
 400 N at 47.75 mm 90 lb at 1.88 in
  • Valve Springs - Valve Spring Load - Open
 1175 N at 35.05 mm 264 lb at 1.38 in
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