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Engine Mechanical Specifications

ENGINE MECHANICAL SPECIFICATIONS

Application Specification
Metric English
Camshaft
  Bearing Caps Oil Clearance (Standard) 0.035-0.072 mm 0.0014-0.0028 in
  Bearing Caps Oil Clearance (Maximum) 0.10 mm 0.0039 in
  Journal Outside Diameter (Standard) 22.949-22.965 mm 0.9035-0.9041 in
  Lobe Height Exhaust (Minimum) 43.61 mm 1.7169 in
  Lobe Height Exhaust (Standard) 43.761-43.861 mm 1.7229-1.7268 in
  Lobe Height Intake (Minimum) 44.18 mm 1.7394 in
  Lobe Height Intake (Standard) 44.333-44.433 mm 1.7454-1.7493 in
  Runout (Maximum) 0.03 mm 0.0012 in
  Thrust Clearance (Standard) 0.040-0.095 mm 0.0016-0.0037 in
  Thrust Clearance (Maximum) 0.11 mm 0.0043 in
Connecting Rods and Bearings
  Connecting Rod Bearing Clearance (Maximum) 0.080 mm 0.0031 in
  Connecting Rod Bearing Clearance (Standard) 0.028-0.060 mm 0.0011-0.0024 in
  Connecting Rod Bow (Maximum) 0.050 mm 0.0020 in
  Connecting Rod Bushing Inside Diameter 20.012-20.021 mm 0.7878-0.7882 in
  Connecting Rod Side Clearance (Maximum) 0.40 mm 0.0157 in
  Connecting Rod Side Clearance (Standard) 0.160-0.342 mm 0.0063-0.0135 in
  Connecting Rod Twist (Maximum) 0.05 mm 0.0039 in
  Crankshaft Diameter 43.992-44.000 mm 1.7320-1.7328 in
  Crankshaft Diameter Out-of-Round and Taper (Maximum) 0.02 mm 0.0004 in
  Rod Bearing Thickness ("1" Stamping) 1.486-1.490 mm 0.0585-0.0587 in
  Rod Bearing Thickness ("2" Stamping) 1.490-1.494 mm 0.0587-0.0588 in
  Rod Bearing Thickness ("3" Stamping) 1.494-1.498 mm 0.0588-0.0590 in
Crankshaft
  Journal Taper or Out-of-Round 0.02 mm 0.0008 in
  Runout at Center Journal 0.03 mm 0.0012 in
  Thrust Bearing Thickness 1.930-1.980 mm 0.0760-0.0780 in
  Thrust Play (Maximum) 0.30 mm 0.0118 in
  Thrust Play (Standard) 0.04-0.24 mm 0.0016-0.0094 in
Cylinder Head
  Gasket Surface Distortion (Maximum) 0.05 mm 0.0020 in
  Seating Distortion Intake and Exhaust Manifolds 0.05 mm 0.0020 in
Cylinder Block
  Cylinder Bore (Standard) 79.000-79.013 mm 3.1102-3.1107 in
  Cylinder Bore (Maximum) 79.02 mm 3.1110 in
  Gasket Surface Distortion (Maximum) 0.05 mm 0.0020 in
  Taper and Out-of-Round (Maximum) 0.10 mm 0.0039 in
Flywheel
  Flywheel Face Runout 0.1 mm 0.004 in
Main Bearings
  Crankshaft Journal Diameter ("0" Stamping) 47.998-48.000 mm 1.8897-1.8898 in
  Crankshaft Journal Diameter ("1" Stamping) 47.996-47.998 mm 1.8896-1.8897 in
  Crankshaft Journal Diameter ("2" Stamping) 47.994-47.996 mm 1.8895-1.8896 in
  Crankshaft Journal Diameter ("3" Stamping) 47.992-47.994 mm 1.8894-1.8895 in
  Crankshaft Journal Diameter ("4" Stamping) 47.990-47.992 mm 1.8893-1.8894 in
  Crankshaft Journal Diameter ("5" Stamping) 47.988-47.990 mm 1.8892-1.8893 in
  Main Bearing Cap Bore Diameter ("0" Stamping) 52.000-52.003 mm 2.0472-2.0473 in
  Main Bearing Cap Bore Diameter ("1" Stamping) 52.003-52.005 mm 2.0473-2.0474 in
  Main Bearing Cap Bore Diameter ("2" Stamping) 52.005-52.007 mm 2.0474-2.0475 in
  Main Bearing Cap Bore Diameter ("3" Stamping) 52.007-52.010 mm 2.0475-2.0476 in
  Main Bearing Cap Bore Diameter ("4" Stamping) 52.010-52.012 mm 2.0476-2.0477 in
  Main Bearing Cap Bore Diameter ("5" Stamping) 52.012-52.014 mm 2.0477-2.0478 in
  Main Bearing Cap Bore Diameter ("6" Stamping) 52.014-52.016 mm 2.0478-2.0479 in
  Main Bearing Clearance (Maximum) 0.050 mm 0.0020 in
  Main Bearing Clearance (Standard) 0.015-0.032 mm 0.0006-0.0013 in
  Main Bearing Thickness ("1" Stamping) 1.994-1.997 mm 0.0785-0.0786 in
  Main Bearing Thickness ("2" Stamping) 1.997-2.000 mm 0.0786-0.0787 in
  Main Bearing Thickness ("3" Stamping) 2.000-2.003 mm 0.0787-0.0789 in
  Main Bearing Thickness ("4" Stamping) 2.003-2.006 mm 0.0789-0.0790 in
Timing Chain and Sprockets
  Chain Elongation (Maximum) 122.6 mm 4.827 in
  Camshaft Sprocket Diameter With Chain (Minimum) 97.4 mm 3.835 in
  Crankshaft Sprocket Diameter With Chain (Minimum) 51.6 mm 2.031 in
Oil Pump
  Housing-to-Oil Pump Gear Set Side Clearance (Maximum) 0.15 mm 0.0059 in
  Outer Rotor-to-Inner Rotor Tip Clearance 0.35 mm 0.0138 in
  Outer Rotor-to-Oil Pump Body Radial Clearance (Maximum) 0.30 mm 0.0118 in
Pistons
  Diameter 78.925-78.935 mm 3.1073-3.1077 in
  Pin Clearance Interference Fit Interference Fit
  Pin Diameter 20.004-20.013 mm 0.7876-0.7879 in
  Piston-to-Cylinder Bore Clearance (Standard) 0.065-0.088 mm 0.0026-0.0035 in
  Piston-to-Cylinder Bore Clearance (Maximum) 0.10 mm 0.0039 in
  Ring End Gap - Lower Ring (Maximum) 1.20 mm 0.0472 in
  Ring End Gap - Lower Ring (Standard) 0.35-0.50 mm 0.0138-0.0197 in
  Ring End Gap - Oil Ring (Maximum) 1.05 mm 0.0413 in
  Ring End Gap - Oil Ring (Standard) 0.15-0.40 mm 0.0059-0.0157 in
  Ring End Gap - Top Ring (Maximum) 1.05 mm 0.0413 in
  Ring End Gap - Top Ring (Standard) 0.25-0.35 mm 0.0098-0.0138 in
  Ring Groove Clearance - Lower Compression Ring 0.030-0.070 mm 0.0012-0.0028 in
  Ring Groove Clearance - Upper Compression Ring 0.030-0.070 mm 0.0012-0.0028 in
Valves
  Guide Inside Diameter 5.510-5.530 mm 0.2169-0.2177 in
  Head Angles for Refinishing - Area Above Seat Contact Surface 15 Degrees
  Head Angles for Refinishing - Seat Contact Surface 45 Degrees
  Seating Contact Width (Standard) 1.25 mm 0.049 in
  Seating Contact Width (Maximum) 0.75 mm 0.030 in
  Spring Deviation 1.6 mm 0.063 in
  Spring Free Length 45.90 mm 1.8070 in
  Spring Preload (Standard) 16.2-17.9 kg at 33.6 mm 35.7-39.5 lb at 1.323 in
  Spring Side Clearance (Maximum) 2.0 mm 0.079 in
  Stem Outside Diameter - Exhaust Valves 5.465-5.480 mm 0.2152-0.2157 in
  Stem Outside Diameter - Intake Valves 5.470-5.485 mm 0.2154-0.2159 in
  Stem-to-Guide Clearance - Exhaust Valves (Standard) 0.030-0.065 mm 0.0012-0.0026 in
  Stem-to-Guide Clearance - Exhaust Valves (Maximum) 0.10 mm 0.0039 in
  Stem-to-Guide Clearance - Intake Valves (Standard) 0.025-0.060 mm 0.0010-0.0024 in
  Stem-to-Guide Clearance - Intake Valves (Maximum) 0.08 mm 0.0031 in
Valve Guides
  Valve Guide Bushing Bore Diameter (Standard) 10.335-10.356 mm 0.4068-0.4077 in
  Valve Guide Bushing Bore Diameter (Maximum) 10.356 mm 0.4077 in
Valve Lash
  Cold - Exhaust Valve 0.25-0.35 mm 0.010-0.014 in
  Cold - Intake Valve 0.15-0.25 mm 0.006-0.010 in
Valve Lifters
  Lifter Diameter 30.966-30.976 mm 1.2191-1.2195 in
  Oil Clearance (Maximum) 0.079 mm 0.0031 in
  Oil Clearance (Standard) 0.024-0.059 mm 0.0009-0.0023 in
Fig 1: Standard Main Bearing Selection Table
G01711474Courtesy of GENERAL MOTORS CORP.
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