191-6760

The Caterpillar 191-6760 Exhaust Valve Seat Insert is a high-temperature, precision-machined combustion chamber component. It is engineered to maintain dimensional stability, ensure airtight valve face sealing, and maximize thermal dissipation away from the exhaust valves during extreme internal combustion cycles subject to intense pressure and aggressive chemical exposure.

Core Dimensions & Fastener Specs
Outside Diameter (OD): 48.00 mm (1.890 in) nominal
Cylinder Head Bore Target: 60.132 ± 0.015 mm (2.3674 ± 0.0006 in) installation zone
Bore Seat Angle: 69.75° ± 0.25° interface taper
Application Target: Cylinder head assembly (Exhaust valve pocket)
Combustion Optimization: Engineered for Low Swirl and 2.0 Swirl cylinder head internal gas dynamics
Material & Manufacturing Specs
Material Grade: Premium high-chromium cast steel alloy.
Coating & Finish: Precision ground face execution with micro-polished sealing angles to minimize structural micro-pitting, carbon accumulation, and high-frequency friction wear.
Manufacturing Standards: Fully casted and certified under ISO 9001 systems to resist thermal fatigue, structural deformation, and heavy mechanical pounding from the valve face.
Equipment & System Compatibility
This high-durability exhaust valve seat insert is standard heavy-duty hardware deployed across a vast selection of large-scale Caterpillar industrial gas engines and power generation platforms:
Engine Platforms: Deployed exclusively within the cylinder head groups of Caterpillar G3500 series large-bore industrial gas configurations, supporting G3508, G3512, G3516, G3516B, G3516C, G3516H, G3516J, G3520B, G3520C, G3524, and G3532 engine blocks.
Power Generation Systems: Widely integrated into long-run continuous generator sets, oilfield gas compression units, and localized co-generation power stations relying on the G3500 platform.
Part Cross-References
Alternative Part Names: Exhaust Valve Seat Insert, Exhaust Valve Insert, Valve Seat Ring.
Alternative Part Numbers: 1916760, 191-6760.