6137-21-2210 Cylinder Liner for Komatsu S6D105 Engine

6137-21-2210 Cylinder Liner for Komatsu 6D105 / S6D105 Engine

The heavy-duty 6137-21-2210 cylinder liner is an industrial-grade wet-type sleeve manufactured specifically to restore original combustion pressure in Komatsu 105mm bore diesel engines. Cast from advanced boron-alloyed iron structures, it delivers superior wear-resistance and optimized fluid-to-wall heat dissipation under sustained earthmoving operations.

Technical Specifications & Verified Dimensions

Preventing Cavitation Erosion and O-Ring Seal Failure

Unlike thin-wall dry sleeves, wet liners like the Komatsu 6137-21-2210 core interact directly with the engine coolant liquid. High-frequency cylinder wall vibrations can generate microscopic vapor bubbles that implode against the outer wall, causing severe cavitation pitting. Over time, this deep erosion can puncture the liner wall or degrade the lower block packing seals, allowing engine coolant to leak down directly into the oil pan, resulting in milky oil contamination.

Deploying our premium nitrided 6137-21-2210 wet sleeves provides robust defense against bubble impact erosion, preserving complete cooling passageway isolation.

Critical Flange Protrusion Height During 105 Series Rebuilds

When rebuilding a classic Komatsu PC200-3 excavator or WA350 loader block, checking the cylinder liner protrusion height (cylinder block deck height relative to the sleeve flange edge) is absolutely vital. If the flange seat is worn or unevenly balanced, the cylinder head gasket will fail to compress perfectly, leading to rapid combustion gas blow-by or water entry into the firing ring. Always measure protrusion tolerances across all six cylinder holes before final block torque configuration.

Request an Industrial Technical Quote Within 24 Hours

To eliminate incorrect ordering and fleet downtime, please send your official Komatsu Engine Serial Number (ESN) or machine metadata plates to our support desk. Our global parts specialists will cross-examine the active factory parts ledger to ensure the 6137-21-2210 cylinder sleeve aligns perfectly with your specific industrial block tier.

FAQ

Are new lower block rubber sealing O-rings included with the 6137-21-2210 liner?

Yes. Our premium 6137-21-2210 wet liners are packed together with the specialized high-fluorine rubber creep-resistant lower crevice seal rings to establish a total, water-tight isolation lock inside the Komatsu 105 block water jacket.

Can this wet liner be dropped directly into the block without machine boring?

Yes, this is a fully-finished pre-honed wet liner. Unlike semi-finished dry sleeves that experience massive compression distortion, the 6137-21-2210 slides smoothly into the cleaned block receiver deck and requires no post-installation honing or precision machining.