TM 5-3895-373-202.13.AIR INTAKE/EXHAUST SYSTEM DIAGNOSTICS.Perform air intake and exhaust system tests wheneverthe engine is running badly, when exhaust emissions areblack (fuel-rich), or if sent here by another diagnostictest.WARNINGAllow engine to cool beforeperforming maintenance on themuffler, exhaust pipe, exhaustmanifold, or turbosupercharger.Direct contact with hot surfaces cancause serious burns. If maintenanceof a heated surface is necessary, useinsulated pads and gloves.2-65
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