Table of Contents
IH: Engine Mechanicals - Sub-01C
Ironhead Engine Case Identification
1957-1971 XLH/XLCH Cases
Short Frame vs Long Frame
Engine interchangeability
1957-1966 (All) and 1967-1969 (XLCH) Short Frame Cases
1967-1969 XLH Long Frame Cases
1970-1971 Long Frame Cases
1972-1976 XLH / XLCH Cases
1977-Up Sportster Cases
1980 XLH Sportster Cases
E1984 Sportster Cases
L1984 Sportster Cases
Specific Engine Case Features
Serial Number / Vin Pad
Various Numbers Found on Cases
Case Part Numbers
Casting Part Numbers
Date Codes
Crankcase Numbers (AKA Belly Numbers)
Case Match Numbers (1975-Up)
Serial or VIN Numbers
Case Drains
Left Case
Primary Cover Mounting Holes
Kicker Shaft Hole
Left Crankcase Oil Scavenge
Right Case
Cylinder Boss
Upper Oil Feed Galley
Oil Tank Fittings
Oil Pump Mounting Boss and Oil Passages
Right Crankcase Oil Scavenge / Engine Breathing
Pinion Shaft Bearing Bushing (1957-1976)
Transmission Countershaft Boss
Speedometer Drive Gear Boss
Primary / Transmission External Vent (1977-1985)
Motor mounts
Rear mounts
Lower Front Mounts
This is an old revision of the document!
IH: Engine Mechanicals - Sub-01C
Ironhead Engine Case Identification
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IH: Engine Mechanicals - Sub-01C
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