Details

• Brand:

  

  

• SKU:

  LC3Z-9N103-B

• Other Names:

  Cooler Assembly Fuel

• Description:

  This is a brand new genuine Ford OEM fuel cooler carrying part number LC3Z-9N103-B, fitting 23-25 F-250, F-350, F-450, and F-550 Super Duty trucks equipped with the 6.7L Power Stroke diesel. This part supersedes the earlier LC3Z-9N103-A. The fuel cooler is a heat exchanger that reduces diesel fuel temperature before the fuel reaches the high-pressure CP4 pump and injectors, protecting these precision components from thermal degradation and maintaining fuel density for accurate injection metering. Hot fuel return from the injector tower flows through the cooler where it sheds heat to the engine cooling circuit or to ambient airflow depending on the installation geometry, then continues back to the tank. Common failure modes include external leakage at the brazed joints after years of vibration, internal coolant-to-fuel leakage that contaminates the fuel system with coolant, and clogging from fuel system contamination events. Symptoms include visible fuel residue around the cooler, unexplained coolant loss, or fuel system performance issues. Replacement requires careful attention to cleanliness to prevent contaminants entering the fuel system. Sold individually; mounting bolts and any one-time-use seals are separate service items. Verify build year before ordering. Backed by Ford's OEM parts limited warranty.

• Replaces:

  LC3Z9N103A

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California Proposition 65

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