Delphi EX630781 Fuel Injector

Delphi EX630781 Diesel Fuel Injector

The Delphi EX630781 is a remanufactured diesel fuel injector built for medium-duty diesel fuel injection systems. It combines OE heritage with a premium replacement design, making it a practical choice for diesel engine service where accurate fuel delivery matters.

For technicians and owners searching for a diesel fuel injector for medium duty applications, the EX630781 offers a metal-and-plastic body, oval female connector, and pin-style terminals. It includes the injector seal and the three O-rings located on the injector for a cleaner service replacement.

Key Features

• Brand: Delphi
• Part number: EX630781
• Fuel type: Diesel
• System type: Medium Duty - Diesel Injector
• Item grade: Premium Replacement
• Remanufactured injector
• Connector shape: Oval
• Connector gender: Female
• Terminal type: Pin
• Terminal quantity: 2
• Attachment method: Bolt
• Body material: Metal and Plastic
• Gasket or seal included: Yes
• Package contents: Fuel Injector, instruction sheet

Detailed Description

Delphi builds this diesel injector using OE experience developed through long-term supplier relationships with major automakers. The EX630781 is a premium replacement injector for medium-duty diesel fuel systems, with the OE-style connector layout and bolt-on attachment method needed for service work on diesel engines. If you are sourcing a diesel fuel injector for a Ford, Chevrolet, or GMC medium-duty diesel application, this part number is commonly searched as a direct replacement reference.

This part cross-references 10R-0781 and DE581 for the same application. The EX630781 part number is also used in diesel injector replacement searches for Ford and Chevrolet medium-duty service needs.

What It Helps Address

• Hard starting caused by poor diesel fuel atomization
• Rough idle from inconsistent injector performance
• Loss of power under load in diesel engine operation
• Excess smoke from improper fuel delivery
• Fuel system service needs tied to injector wear

Installation Notes and Tips

Verify the connector shape, terminal style, and attachment method before installation. Inspect the injector bore and sealing surfaces, and replace any damaged seals or contamination-related components during service. Follow the vehicle service procedure for torque, coding, and fuel system priming where required. This injector is listed as remanufactured and includes the injector seal and O-rings located on the injector.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge used by major automakers. That OE background is built into this premium replacement diesel injector to support consistent service quality for medium-duty diesel applications.