Posted on October 10, 2023 by sam DD15 Leaky Exhaust System Troubleshooting Check as follows: Steam clean the engine. Start the engine. Look for signs of soot and leakage around connections. Check for loose clamps and bolts, blown gaskets and cracks in the manifold and turbocharger. Related Posts DD15 Water in Exhaust TroubleshootingCheck as follows: Does the vehicle have a vertical exhaust and stack? If yes, go to the next step. If… DD15 Faulty Exhaust System TroubleshootingCheck as follows: Check the following for leaks: Exhaust Manifold and Bellows Turbocharger Interstage Duct APT Repair leaks if found,… DD15 Different Engine Noise TroubleshootingDifferent engine noises that are heard when a problem occurs are listed in the following table. Type of Noise Check… DD15 Worn Belts TroubleshootingCheck as follows: Check belt conditions for the fan and water pump belts. If the belts are not in good… DD15 SPN 628/FMI 14 TroubleshootingSPN 628/FMI 14 SPN 628/FMI 14 indicates an XFLASH failure. Replace the CPC and reprogram with the latest software release.