A high pressure fuel pump is a core component in the fuel system of a diesel engine, responsible for supplying precisely metered fuel at high pressure to the injectors. The Caterpillar C6.4 High Pressure Fuel Pump (2014–2022, OEM 326-4635) is engineered to meet exact factory standards, ensuring accurate fuel delivery and supporting efficient combustion. Choosing the correct OEM fuel pump helps maintain engine responsiveness, fuel efficiency, and long-term durability for Caterpillar C6.4 engines.
This high pressure fuel pump plays a vital role in how your engine performs — here’s why it matters:
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Delivers High-Pressure Fuel – Provides the precise pressure needed to ensure the injectors atomize fuel effectively for complete combustion.
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Supports Smooth Engine Operation – Consistent fuel supply helps eliminate rough idling, hard starts, or loss of power under load.
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Enhances Fuel Efficiency – Accurate fuel metering contributes to better combustion, which can improve fuel economy and reduce unburned fuel waste.
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OEM-Grade Fit and Durability – As OEM 326-4635, this pump matches original equipment specifications for fit, performance, and long-lasting reliability.
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Prevents Fuel System Issues – Replacing a worn or failing fuel pump helps avoid common problems such as poor engine response, excessive smoke, or fuel delivery faults.
A failing high pressure fuel pump can lead to reduced performance, rough running, and potential engine damage. The Caterpillar C6.4 High Pressure Fuel Pump (OEM 326-4635) provides the consistent, OEM-standard fuel delivery your engine depends on — helping keep your diesel running smoothly, efficiently, and reliably. For customers seeking a dependable replacement, Tamerx offers high-quality fuel system components designed to support long-term engine health and performance.













