In this video, we’re taking a close look at the ISX EGR system. We’ll walk through how it functions, starting from the exhaust manifold, and explore the potential issues that arise when deleting this system.
What You Will Learn:
How the EGR system controls exhaust gas and intake air
Key components of the ISX EGR system and their functions
The risks and downsides of deleting the EGR system
Step-by-Step Guide/Tutorial:
EGR System Overview:
Exhaust gases flow from the exhaust manifold into the EGR cooler, where coolant helps reduce gas temperature before reaching the EGR valve.
The EGR valve controls the amount of exhaust gas mixed with clean air from the turbo’s charge air cooler, which then enters the intake manifold through a venturi, ensuring the right combustion temperature.
Potential Pitfalls of Deleting:
Legal Issues: Deleting the EGR system can result in your vehicle being non-compliant with emissions regulations, limiting where you can operate.
Loss of Engine Braking and Torque Curve: Removing the VGT (Variable Geometry Turbo) reduces engine braking and low-end torque, both of which are crucial for efficient operation.
Coolant Flow Issues: Without the EGR cooler, the coolant path from the water pump to cylinders 5 and 6 is disrupted, increasing the risk of cylinder scoring and overheating.
Increased Combustion Temperatures: With 100% clean air entering the engine, combustion temperatures rise significantly, from the typical 600-700°F with EGR to potentially 1,200-1,300°F without it. This can cause engine damage if not closely monitored.
Consequences of Deleting:
While removing the EGR system may seem cost-effective upfront, it often leads to long-term engine damage, including burned pistons, cracked valves, and costly overhauls.
Key Benefits:
Engine Longevity: Learning and maintaining the EGR system preserves your engine’s performance and lifespan.
Avoid Costly Repairs: Properly operating with the EGR system in place can prevent major engine failures that result from overheating and improper combustion.
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