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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 437 (Engine Mechanical - 4.8L, 5.3L, & 6.0L (On-Vehicle)) >> Specifications >> Engine Mechanical Specifications (LR4 VIN V)

Engine Mechanical Specifications (LR4 VIN V)

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Engine Mechanical Specifications (LR4 VIN V)

Application Metric English
General Data
  • Engine Type
 V8
  • Displacement
 4.8L 293 CID
  • Bore
 96.000-96.018 mm 3.779-3.78 in
  • Stroke
 83.0 mm 3.268 in
  • Compression Ratio
 9.45:1
  • Firing Order
 1-8-7-2-6-5-4-3
  • Spark Plug Gap
 1.524 mm 0.06 in
Lubrication System
  • Oil Capacity (without Oil Filter Change)
 4.73 Liters 5.0 Quarts
  • Oil Capacity (with Oil Filter Change)
 5.68 Liters 6.0 Quarts
  • Oil Pressure (Minimum-Hot)
 41 kPa at 1,000 engine RPM
124 kPa at 2,000 engine RPM
165 kPa at 4,000 engine RPM		 6 psig at 1,000 engine RPM
18 psig at 2,000 engine RPM
24 psig at 4,000 engine RPM
  • Oil Type
 5W-30
Camshaft
  • Camshaft End Play
 0.025-0.305 mm 0.001-0.012 in
  • Camshaft Journal Diameter
 54.99-55.04 mm 2.164-2.166 in
  • Camshaft Journal Diameter Out-of-Round
 0.025 mm 0.001 in
  • Camshaft Lobe Lift (Intake)
 6.82 mm 0.268 in
  • Camshaft Lobe Lift (Exhaust)
 6.96 mm 0.274 in
  • Camshaft Runout (Measured at the Intermediate Journals)
 0.05 mm 0.002 in
Connecting Rod
  • Connecting Rod Bearing Bore Diameter
 56.505-56.525 mm 2.224-2.225 in
  • Connecting Rod Bearing Bore Out-of-Round
 0.004-0.008 mm 0.00015-0.0003 in
  • Connecting Rod Bearing Clearance (Production)
 0.023-0.065 mm 0.0009-0.0025 in
  • Connecting Rod Bearing Clearance (Service Limit)
 0.023-0.076 mm 0.0009-0.003 in
  • Connecting Rod Side Clearance
 0.11-0.51 mm 0.0043-0.02 in
Crankshaft
  • Crankshaft Bearing Clearance (Production)
 0.020-0.052 mm 0.0008-0.0021 in
  • Crankshaft Bearing Clearance (Service)
 0.020-0.065 mm 0.0008-0.0025 in
  • Crankshaft Connecting Rod Journal Diameter (Production)
 53.318-53.338 mm 2.099-2.1 in
  • Crankshaft Connecting Rod Journal Diameter (Service Limit)
 53.308 mm (Minimum) 2.0987 in (Minimum)
  • Crankshaft Connecting Rod Journal Taper (Production)
 0.005 mm (Maximum for one half of the Journal Length) 0.0002 in (Maximum for one half of the Journal Length)
  • Crankshaft Connecting Rod Journal Taper (Service Limit)
 0.02 mm (Maximum) 0.00078 in (Maximum)
  • Crankshaft Connecting Rod Journal Out-of-Round (Production)
 0.005 mm 0.0002 in
  • Crankshaft Connecting Rod Journal Out-of-Round (Service Limit)
 0.01 mm 0.0004 in
  • Crankshaft End Play
 0.04-0.2 mm 0.0015-0.0078 in
  • Crankshaft Main Journal Diameter (Production)
 64.993-65.007 mm 2.558-2.5593 in
  • Crankshaft Main Journal Diameter (Service Limit)
 64.993 mm (Minimum) 2.558 in (Minimum)
  • Crankshaft Main Journal Out-of-Round (Production)
 0.003 mm 0.0001 in
  • Crankshaft Main Journal Out-of-Round (Service Limit)
 0.008 mm 0.0003 in
  • Crankshaft Main Journal Taper (Production)
 0.01 mm 0.0004 in
  • Crankshaft Main Journal Taper (Service Limit)
 0.02 mm 0.00078 in
  • Crankshaft Reluctor Ring Runout (Measured 1.0 mm (0.04 in) Below the Tooth Diameter)
 0.7 mm (Maximum) 0.028 in (Maximum)
  • Crankshaft Runout (at Rear Flange)
 0.05 mm (Maximum) 0.002 in (Maximum)
  • Crankshaft Thrust Wall Runout
 0.025 mm 0.001 in
  • Crankshaft Thrust Wall Width (Production)
 26.14-26.22 mm 1.029-1.0315 in
  • Crankshaft Thrust Wall Width (Service)
 26.2 mm (Maximum) 1.0315 in (Maximum)
Cylinder Bore
  • Cylinder Bore Diameter (Production)
 96.0-96.018 mm 3.779-3.78 in
Cylinder Head
  • Cylinder Head Engine Block Deck Flatness (Measured within a 156 mm (6.1 in) area)
 0.08 mm 0.003 in
  • Cylinder Head Engine Block Deck Flatness (Measuring the Overall Length of the Cylinder Head)
 0.1 mm 0.004 in
  • Cylinder Head Exhaust Manifold Deck Flatness
 0.13 mm 0.005 in
  • Cylinder Head Height (Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface)
 120.2 mm (Minimum) 4.732 in (Minimum)
  • Cylinder Head Intake Manifold Deck Flatness
 0.08 mm 0.0031 in
Engine Block
  • Camshaft Bearing Bore 1 and 5 Diameter
 59.12-59.17 mm 2.327-2.329 in
  • Camshaft Bearing Bore 2 and 4 Diameter
 58.87-58.92 mm 2.317-2.319 in
  • Camshaft Bearing Bore 3 Diameter
 58.62-58.67 mm 2.307-2.309 in
  • Engine Block Cylinder Head Deck Surface Flatness (Measured within a 156 mm (6.1 in) area)
 0.11 mm 0.004 in
  • Engine Block Cylinder Head Deck Surface Flatness (Measuring the Overall Length of the Block Deck)
 0.22 mm 0.008 in
  • Engine Block Cylinder Head Deck Height (Measuring from the Centerline of Crankshaft to the Deck Face)
 234.57-234.82 mm 9.235-9.245 in
  • Main Bearing Bore Diameter (Production)
 69.871-69.889 mm 2.750-2.751 in
  • Main Bearing Bore Diameter Out-of-Round
 0.006 mm 0.0002 in
  • Valve Lifter Bore Diameter (Production)
 21.417-21.443 mm 0.843-0.844 in
Intake Manifold
  • Intake Manifold Cylinder Head Deck Flatness (Measured within a 200 mm (7.87 in) Area that Includes Two Runner Port Openings)
 3.0 mm 0.118 in
Oil Pan and Front/Rear Cover Alignment
  • Oil Pan to Rear of Engine Block Alignment (at Transmission Bellhousing Mounting Surface)
 0.0-0.25 mm (Maximum) 0.0-0.01 in (Maximum)
  • Front Cover Alignment (at Oil Pan Surface)
 0.0-0.5 mm 0.0-0.02 in
  • Rear Cover Alignment (at Oil Pan Surface)
 0.0-0.5 mm 0.0-0.02 in
Piston
  • Piston - Piston Diameter Measured Over Skirt Coating
 96.002-96.036 mm 3.779-3.78 in
  • Piston - Piston-to-Bore Clearance - Production
 -0.036 to +0.016 mm -0.0014 to +0.0006 in
  • Piston - Piston-to-Bore Clearance - Service Limit - with Skirt Coating Worn Off
 0.07 mm 0.0028 in
Piston Pin
  • Piston Pin Clearance to Piston Bore (Production)
 0.007-0.020 mm 0.00027-0.00078 in
  • Piston Pin Clearance to Piston Bore (Service Limit)
 0.007-0.021 mm (Maximum) 0.00027-0.00082 in (Maximum)
  • Piston Pin Diameter
 23.997-24.0 mm 0.9447-0.9448 in
  • Piston Pin Fit in Connecting Rod
 0.020-0.043 mm (Interference) 0.00078-0.00169 in (Interference)
Piston Rings
  • Piston Compression Ring End Gap (Production-Top) (Measured in Cylinder Bore)
 0.23-0.44 mm 0.009-0.017 in
  • Piston Compression Ring End Gap (Production-2nd) (Measured in Cylinder Bore)
 0.44-0.70 mm 0.0173-0.0275 in
  • Piston Oil Ring End Gap (Production) (Measured in Cylinder Bore)
 0.18-0.75 mm 0.007-0.0295 in
  • Piston Compression Ring End Gap (Service-Top) (Measured in Cylinder Bore)
 0.23-0.50 mm (Maximum) 0.009-0.02 in (Maximum)
  • Piston Compression Ring End Gap (Service-2nd) (Measured in Cylinder Bore)
 0.44-0.76 mm (Maximum) 0.0173-0.03 in (Maximum)
  • Piston Oil Ring End Gap-Service Limit (Measured in Cylinder Bore)
 0.18-0.81 mm (Maximum) 0.007-0.032 in (Maximum)
  • Piston Compression Ring Groove Clearance (Production-Top)
 0.04-0.085 mm 0.00157-0.003346 in
  • Piston Compression Ring Groove Clearance (Production-2nd)
 0.04-0.078 mm 0.00157-0.0031 in
  • Piston Oil Ring Groove Clearance (Production)
 0.012-0.20 mm 0.0005-0.0078 in
  • Piston Compression Ring Groove Clearance (Service-Top)
 0.04-0.085 mm (Maximum) 0.00157-0.003346 in (Maximum)
  • Piston Compression Ring Groove Clearance (Service-2nd)
 0.04-0.078 mm (Maximum) 0.00157-0.0031 in (Maximum)
  • Piston Oil Ring Groove Clearance (Service Limit)
 0.012-0.20 mm (Maximum) 0.0005-0.0078 in (Maximum)
Valve System
  • Valve Face Angle
 45 degrees
  • Valve Guide Installed Height (Aluminum Head-Measured from the Cylinder Head Spring Seat Surface to the Top of the Valve Guide)
 17.32 mm 0.682 in
  • Valve Lash
 Net Lash-No Adjustment
  • Valve Lift (Exhaust)
 11.85 mm 0.466 in
  • Valve Lift (Intake)
 11.6 mm 0.457 in
  • Valve Lifter
 Hydraulic Roller
  • Valve Margin
 1.25 mm 0.05 in
  • Valve Rocker Arm Ratio
 1.70:1
  • Valve Seat Angle
 46 degrees
  • Valve Seat Runout
 0.05 mm (Maximum) 0.002 in (Maximum)
  • Valve Seat Width (Exhaust)
 1.78 mm 0.07 in
  • Valve Seat Width (Intake)
 1.02 mm 0.04 in
  • Valve Spring Free Length
 52.9 mm 2.08 in
  • Valve Spring Installed Height (Exhaust)
 45.75 mm 1.8 in
  • Valve Spring Installed Height (Intake)
 45.75 mm 1.8 in
  • Valve Spring Pressure (Closed)
 340 N at 45.75 mm 76 lb at 1.8 in
  • Valve Spring Pressure (Open)
 980 N at 33.55 mm 220 lb at 1.32 in
  • Valve Stem Clearance (Production-Exhaust)
 0.025-0.066 mm 0.001-0.0026 in
  • Valve Stem Clearance (Production-Intake)
 0.025-0.066 mm 0.001-0.0026 in
  • Valve Stem Clearance (Service-Exhaust)
 0.093 mm (Maximum) 0.0037 in (Maximum)
  • Valve Stem Clearance (Service-Intake)
 0.093 mm (Maximum) 0.0037 in (Maximum)
  • Valve Stem Diameter (Production)
 7.955-7.976 mm 0.3132-0.314 in
  • Valve Stem Diameter (Service)
 7.95 mm (Minimum) 0.313 in (Minimum)
  • Valve Stem Oil Seal Installed Height (Measured from the Valve Spring Shim to Top Edge of Seal Body - First Design Seal)
 18.1-19.1 mm 0.712-0.752 in
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