5.9L Cummins Common Rail Injector Seal Kit 2003-2007 OEM 3979419 - Cummins

Overview

This is an injector seal, cup and tube service kit for the Ram, Dodge 5.9L Cummins Common Rail diesel (2003-2007). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade 5.9L Cummins Common Rail repair or service. Every order ships fast and is backed by our support team.

What It Does & How It Helps

Each injector is sealed to the cylinder head by a copper combustion washer and a set of O-rings, and on many engines it rides in a steel cup or sleeve. When those seals harden or a cup erodes, combustion gases chuff past the injector, fuel washes down into the oil, or a cylinder runs rough. A complete seal, cup and tube service kit restores a gas-tight injector seal and clean fuel control whenever the injectors are pulled or a leak is traced to the injector base — the correct way to reseal rather than reuse tired parts.

What's Included

• injector combustion (copper) seals and O-rings
• injector cups/sleeves and connector or ball tubes as applicable
• hold-down and related hardware where specified

Fitment

Fits Ram, Dodge trucks equipped with the 5.9L Cummins Common Rail diesel engine, 2003-2007. Please confirm your engine and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this 5.9L Cummins Common Rail part when you experience:

• a chuffing or combustion leak at the injector
• fuel in the oil or oil consumption
• a rough-running cylinder
• an injector reseal, cup replacement or install

Specifications

• OEM Part Number: 3979419
• Engine: 5.9L Cummins Common Rail
• Year Range: 2003-2007

Quality & Service

Fast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for 5.9L Cummins Common Rail diesel parts.