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On a DD15, the EGR system recirculates 30–40% of exhaust gases back into the intake — and that changes everything. Those intake temps jump from normal Series 60 levels of 90–160° all the way up to 250–400°. That’s a massive difference in how the engine runs, performs, and wears. Understanding this helps you diagnose issues faster and avoid unnecessary breakdowns.TAT Express4140 Langdon Rd, Dallas, TX 75241972-225-3017Google: https://maps.app.goo.gl/KzW9PgYB8Vr7Vw8x7?g_st=ipcFull Video: Why Is Th
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