EMD 8310840 Engine Exhaust Valve Guide OEM High Durability Car Valve Guide

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:

1. Extended Service Life - Outlasts standard guides by 30-40% in continuous operation

2. Heat Dissipation - Bronze construction effectively transfers heat from valve stems

3. Lubrication Control - Maintains optimal oil film for wear protection

4. 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.

• Equipped with advanced testing machinery for material analysis and heat treatment verification.
• Dedicated engineering and QC teams ensure every product meets your exact specifications and performance requirements.

• Custom solutions available based on your samples or technical drawings.
• Trial orders (small quantities accepted) to facilitate smooth collaboration and build long-term partnerships.