On the intake side of the DD15, exhaust gas recirculation completes its path back into the engine. The EGR cooler feeds exhaust through a tube into the intake, and a delta-P (differential pressure) sensor monitors pressure on both sides of the system.That sensor — along with others like the intake temperature sensor — helps the ECM control the EGR valve. If the delta-P passages clog, EGR flow becomes inaccurate and drivability problems begin. Earlier designs tried using an intake throttle valve
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On the intake side of the DD15, exhaust gas recirculation complet…
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6.8K views · 52 reactions | On a DD15, the EGR system recirculates...
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So how does the EGR system actually work on a DD15? The DD15 uses a three-piece exhaust manifold, and the EGR passage is built directly into the center section of that manifold.When the EGR valve opens, a portion of exhaust gas is diverted through a hot pipe and into the EGR cooler. Inside the cooler, exhaust gas flows through internal tubes surrounded by engine coolant. The gas enters extremely hot and exits at a lower temperature before being routed back into the intake.It’s still hot — just c
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So how does the EGR system actually work on a DD15? The DD1…
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💧🔥 EGR Cooler Leak Found – DD15 Engine Overheating & Coolant Loss 🔥💧This DD15 engine came in after the customer reported that the truck was running hot and losing coolant, even after several parts had already been replaced at another shop.During a detailed inspection of the cooling system, our specialist tech found coolant leaking directly from the EGR cooler — the root cause behind the overheating and coolant loss issues.💡 Why EGR cooler leaks happen:• Thermal stress and constant exhaust h
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💧🔥 EGR Cooler Leak Found – DD15 Engine Overheating & Coolant Lo…
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💧🔥 Coolant Leak in DD15 EGR Cooler + DPF Inspection 🚛🔧
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💧🔥 Coolant Leak in DD15 EGR Cooler + DPF Inspection 🚛🔧
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