4999595 | Genuine Cummins® Exhaust Recirculation Cooler EGR

• Cummins® ISM 10.8L Engines: 2007–2010 model years, Generation II configurations.

• Freightliner® Trucks: Columbia models equipped with Cummins® ISM 10.8L Generation II engines.

• Heavy-Duty Commercial Trucks: Compatible with selected truck applications powered by Cummins® ISM 10.8L diesel engines.

• EGR System Compatibility: Designed for Cummins® ISM Generation II exhaust gas recirculation systems.

Core Functions & Technical Features

• Exhaust Gas Cooling: Reduces exhaust gas temperatures before recirculation into the intake manifold.

• Emission Control: Helps lower combustion temperatures and reduce harmful nitrogen oxide (NOx) emissions.

• Engine Performance Support: Maintains proper EGR system operation and supports efficient diesel engine performance.

• Heavy-Duty Construction: Designed to withstand high exhaust temperatures, thermal cycling, vibration, and demanding commercial diesel engine operating conditions.

• Cooling System Integration: Uses engine coolant to transfer heat away from recirculated exhaust gases.

• Genuine Cummins® Quality: Manufactured to meet Cummins® specifications for durability, reliability, and proper system compatibility.

1. Reduced Engine Performance and Increased Emissions

• Symptom: The engine may experience reduced power, poor acceleration, increased fuel consumption, and excessive exhaust smoke. The "CHECK ENGINE" warning light may also illuminate.

• Cause: A clogged, restricted, or damaged cooler prevents proper exhaust gas cooling, disrupting the EGR system's operation and affecting engine performance.

2. Coolant Leaking Into the Exhaust System

• Symptom: White smoke or excessive steam coming from the exhaust pipe, unexplained coolant loss, and a sweet coolant smell in the exhaust.

• Cause: Internal cracks or damage to the EGR cooler allow engine coolant to leak into the exhaust gas passages and enter the intake system.

3. Engine Overheating and Coolant Loss

• Symptom: Rising engine temperature, frequent coolant level drops, coolant reservoir pressure buildup, or repeated low coolant warnings on the dashboard.

• Cause: Internal or external damage to the EGR cooler can cause coolant leakage, reducing the efficiency of the engine cooling system.

4. Active Diagnostic Fault Codes (DTCs)

• Symptom: The yellow "CHECK ENGINE" light illuminates, and diagnostic trouble codes are stored in the Cummins® ECM.

• Common Fault Codes:

  • Fault Code 2359: EGR System – Differential Pressure.

  • Fault Code 2346: Exhaust Gas Recirculation (EGR) Temperature – Data Valid but Above Normal Operating Range.

  • Fault Code 3382: EGR Cooler Efficiency – Below Normal.

• Cause: Abnormal EGR temperatures, restricted exhaust gas flow, or insufficient EGR cooler performance may trigger diagnostic faults.

5. White Smoke and Unusual Exhaust Odor

• Symptom: Thick white exhaust smoke, unusual exhaust odors, rough engine operation, or coolant vapor coming from the exhaust system.

• Cause: Coolant entering the exhaust stream through a damaged EGR cooler may produce visible white smoke and unusual exhaust odors.