B18C Bottom End Specifications: pistons, cylinder block, rods and more

CRANKSHAFT, MAIN and CONNECTING ROD BEARINGS - In. (mm)

• Crankshaft
  • End Play
    • Standard: 0.004-0.014 (0.10-0.35)
    • Service Limit: 0.018 (0.45)
  • Runout
    • Standard: 0.001 (0.03)
    • Service Limit: 0.002 (0.05)
• Main Bearings
  • Journal Diameter
    • Except No. 3: 2.1644-2.1654 (54.976-55.001)
    • No. 3: 2.1643-2.1653 (54.973-54.998)
  • Journal Out-Of-Round
    • Standard: 0.0002 (0.005)
    • Service Limit: 0.0004 (0.010)
• Journal Taper
  • Standard: 0.0002 (0.005)
  • Service Limit: 0.0004 (0.010)
• Oil Clearance
  • Except No. 3 Journal
    • Standard: 0.0009-0.0017 (0.023-0.043)
    • Service Limit: 0.0020 (0.050)
  • No. 3 Journal
    • Standard: 0.0012-0.0019 (0.030-0.048)
    • Service Limit: 0.0024 (0.060)
• Connecting Rod Bearings
  • Journal Diameter: 1.7707-1.7717 (44.976-45.001)
  • Journal Out-Of-Round
    • Standard: 0.0002 (0.005)
    • Service Limit: 0.0004 (0.010)
• Journal Taper
  • Standard: 0.0002 (0.005)
  • Service Limit: 0.0004 (0.010)
• Oil Clearance
  • Standard: 0.0013-0.0020 (0.033-0.050)
  • Service Limit: 0.0024 (0.060)

CONNECTING RODS - In. (mm)

• Bore Diameter
  • Crankpin Bore: 1.89 (48.0)
  • Pin Bore: 0.8254-0.8267 (20.965-20.998)
• End Play
  • Standard: 0.006-0.012 (0.15-0.30)
  • Service Limit: 0.016 (0.40)

PISTONS, PINS AND RINGS - In. (mm)

• Pistons
  • Clearance
    • Standard: 0.0004-0.0016 (0.010-0.040)
    • Service Limit: 0.002 (0.050)
  • Diameter - Measure at 0.6" (15 mm) from bottom of skirt.
    • Standard: 3.1882-3.1886 (80.980-80.990)
    • Service Limit: 3.1878 (80.970)
    • Oversize: 0.010 (0.25) 3.1984-3.1988 (81.239-81.249)
• Pins
  • Diameter: 0.8265-0.8268 (20.993-21.000)
  • Piston Fit: 0.0004-0.0009 (0.010-0.022)
  • Rod Fit: 0.0007-0.0014 (0.017-0.035)
• Rings
  • No. 1
    • End Gap: 0.008-0.014 (0.20-0.35)
    • Service Limit: 0.024 (0.60)
    • Side Clearance: 0.0018-0.0028 (0.045-0.071)
    • Service Limit: 0.005 (0.13)
  • No. 2
    • End Gap: 0.016-0.022 (0.40-0.55)
    • Service Limit: 0.028 (0.71)
    • Side Clearance: 0.0016-0.0026 (0.040-0.066)
    • Service Limit: 0.005 (0.13)
  • No. 3 (Oil)
    • End Gap: 0.008-0.020 (0.20-0.50)
    • Service Limit: 0.028 (0.71)

CYLINDER BLOCK - In. (mm)

• Cylinder Bore
  • Standard Diameter: 3.189-3.190 (81.00-81.02)
  • Service Limit: 3.192 (81.07)
  • Maximum Taper: 0.002 (0.05)
  • Maximum Re-bore Limit: 0.010 (0.25)
• Deck Warpage
  • Maximum: 0.002 (0.05)
  • Service Limit: 0.003 (0.08)