Answer
Mar 17, 2026 - 12:06 PM
To tell if an EGR cooler is bad on a 6.0 Powerstroke, look for symptoms like unexplained coolant loss, white exhaust smoke at startup, and coolant contamination (oil in coolant or vice versa). Overheating or bubbling in the coolant reservoir also indicate a failing EGR cooler. One quick check is to remove the EGR valve—if it’s wet with a tar-like substance, your EGR cooler 6.0 has likely failed. Upgrading to a Sinister Diesel 6.0 Blue EGR Cooler for your 2004-2007 Ford Powerstroke can help prevent these common problems and increase reliability.
