Deyang Hexin Machinery Co., Ltd.
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| Valve Guide | 8310840 |
| Material | Alloy cast iron |
| Brand | EMD |
| Engine | EMD Engine |
| Fuel | Oil |
This OEM-specified exhaust valve guide (part #8310840) is designed to deliver exceptional performance and longevity for EMD engines operating under extreme conditions. Manufactured to exact original specifications, it provides reliable valve alignment and heat management in heavy-duty diesel applications.
✔ Key Features & Benefits
1. Precision OEM Replacement
Exact duplicate of EMD part #8310840 with identical dimensions
CNC-machined to maintain original valve stem clearance specifications
Guaranteed fit for EMD 645 and 710 series engines without modification
2. Advanced Material Technology
Impregnated oil reservoirs for continuous lubrication
Heat-treated to withstand exhaust temperatures exceeding 800°F (427°C)
3. Enhanced Engine Protection
Prevents valve stem wear and scoring
Maintains perfect valve alignment under load
Reduces oil consumption by controlling lubrication flow
Extends valve life by minimizing side loads
✔ Critical Replacement Indicators
1. Visible Wear Symptoms
Excessive valve stem clearance (beyond 0.006" for intake/0.008" for exhaust)
Oval-shaped wear patterns in existing guides
Visible scoring or galling on valve stems
2. Performance Issues
Increased oil consumption through valve guides
Blue exhaust smoke during acceleration
Irregular valve train noise
Reduced engine compression
✔ Technical Superiority
1. Precision Manufacturing
ID honed to 16-32 microinch finish for optimal oil retention
Concentricity maintained within 0.0005" TIR
Length tolerance held to ±0.001" for proper spring seat alignment
2. Durability Enhancements
Special groove design for positive oil control
Hardened wear surface resists abrasive particles
Maintains dimensional stability through thermal cycles
✔ Professional Installation Requirements
1. Machining Process
Requires proper reaming to achieve specified interference fit
Needs guide height adjustment for proper valve spring operation
Demands professional installation tools for press-fit applications
2. Complementary Services
Valve stem should be measured for proper clearance
Recommended to replace valves when installing new guides
Essential to check rocker arm geometry after installation
Compatible Applications:
EMD 645E3 and 710G3 engines
Locomotive power units
Marine propulsion systems
Stationary power generation units
Why This Valve Guide Excels:
Extended Service Life - Outlasts standard guides by 30-40% in continuous operation
Heat Dissipation - Bronze construction effectively transfers heat from valve stems
Lubrication Control - Maintains optimal oil film for wear protection
Vibration Resistance - Dampens valve train harmonics for smoother operation
Package Includes:
(1) Premium-quality valve guide (OEM #8310840)
Anti-corrosion protective coating
Detailed installation guidelines
Important Considerations:
Verify engine model and series before ordering
Professional installation with proper tooling required
Recommended to replace all guides during major overhaul
Requires proper break-in procedure for optimal performance
This OEM-grade valve guide provides the precision and reliability required for EMD engine maintenance and rebuilding. Engineered to withstand the rigorous demands of continuous heavy-duty operation, it restores original equipment performance while offering improved durability characteristics. Whether servicing locomotive, marine, or stationary power units, this component delivers the quality needed for maximum engine life and efficiency.
With over 30 years of expertise in automotive parts export, we specialize in manufacturing high-precision, high-performance components for global markets. Our products meet stringent quality standards and are trusted by clients worldwide.