111-198-481OS VW Main Bearing Set - Std Crank / .40 Case / .40 Thrust

Main Bearing Set (Standard Crank / .40 Case / .40 Thrust) – 111-198-481OS

The 111-198-481OS is a critical component for professional engine machinists and restorers. Over decades of use, the magnesium or aluminum alloy cases of the Type 1 engine can "pound out," leading to a loose fit at the main bearings or excessive crankshaft end-play. By line-boring the case to a 0.40mm oversize and machining the thrust face by 0.40mm, you can return the engine to factory-tight tolerances. This bearing set is the exact hardware required to bridge the gap between a standard crankshaft and a precision-machined engine case.

This set is compatible with the entire range of upright air-cooled engines from the 40hp 1200cc through the final 1600cc dual-port models.

Detailed Vehicle Compatibility

VW Beetle:

1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977

VW Super Beetle:

1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979

VW Bus (Type 2):

1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971

VW Karmann Ghia:

1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974

VW Thing:

1973, 1974

VW Type 3:

1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973

Product Highlights & Features

• Precision Oil Holes: Features factory-aligned oil galleys to ensure immediate lubrication to the crankshaft journals upon startup.

• Thrust Bearing Reinforcement: The oversized thrust bearing is designed to handle the axial load of the clutch assembly, preventing "crank walk" after the case has been surfaced.

• Application Versatility: Works with single-port and dual-port configurations, as well as early 1200cc, 1300cc, 1500cc, and 1600cc engine displacements.

Technical Specifications

• Part Number: 111-198-481OS

• Crankshaft Journal: Standard (Std)

• Engine Case Bore: +0.40mm

• Thrust Flange: +0.40mm

• Engine Fitment: 1200cc (40hp) to 1600cc

Installation & Maintenance Tips

• Measure Twice: Before ordering, use a precision micrometer to verify that your machinist has bored the case to exactly +0.40mm and cut the thrust to +0.40mm. Using the wrong "oversize" set will result in oil pressure failure or engine seizure.

• Clean the Galleys: Before installing these bearings, ensure the engine case oil galleys are completely free of machining shavings or debris. Any metal left behind will quickly score the new bearing surfaces.

• Assembly Lube: Use a high-quality engine assembly lube on the bearing faces during installation. Do not use standard motor oil, as it may drain away before the engine builds initial oil pressure on its first start.

111198481OS