255-0897: 17.49mm Outer Diameter Valve Guide

The Caterpillar 255-0897 Exhaust Valve Guide is a high-temperature, wear-resistant reciprocating control component. It is engineered to maintain perfect axial valve alignment, minimize structural lateral play, and maximize thermal dissipation away from the valve stem during intense gas combustion cycles subject to constant mechanical abrasion and high-velocity gas forces.

Core Dimensions & Fastener Specs
Outer Diameter (OD): 17.49 mm (0.689 in)
Overall Length: 132.21 mm (5.205 in)
Component Width / Height: 30.38 mm (1.196 in)
Component Type: Press-Fit Exhaust Valve Guide
Net Weight: 0.11 kg (0.24 lbs)
Material & Manufacturing Specs
Material Grade: Premium high-density gray flake iron or specialized wear-resistant cast alloy.
Coating & Finish: Precision micro-honed inner diameter wall engineered with localized retention capabilities to trap lubricant films and prevent structural scuffing, high-frequency stem wear, and seizing.
Manufacturing Standards: Manufactured to precise OEM geometric tolerances under ISO 9001 certified conditions to withstand rapid thermal expansion and continuous high-temperature exhaust exposure.
Equipment & System Compatibility
This high-durability exhaust valve guide is standard heavy-duty hardware deployed across a vast selection of large-scale Caterpillar industrial natural gas engines and power generation platforms:
Engine Platforms: Integrated into core cylinder head groups and top-end rebuild networks for Caterpillar G3500-series large-bore gas engine configurations, explicitly supporting G3508, G3516, G3516B, and G3520B engine blocks.
Power Generation Systems: Widely used within the valvetrain systems of continuous heavy-duty generator sets, landfill co-generation setups, and oilfield gas compression stations relying on the gas-powered 3500 engine platform.
Part Cross-References
Alternative Part Names: Exhaust Valve Guide, Cylinder Head Valve Guide, Guide-Valve (Exhaust).
Alternative Part Numbers: 2550897, 255-0897.