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EGR Cooler Update

Ultra-low sulfur diesel fuel has helped reduce some issues associated with today’s EGR and DPF systems, but some problems like corroded coolers and stuck valves still seem to exist, especially on older vehicles.

Diesel engines reintroduce EGR exhaust soot that corrodes valves and coolers due to condensation which also causes them to stick open or closed due to a build-up of gummy deposits. Engine failures are not as common today as a result of changes in design combined with the use of ultra-low sulfur diesel fuel which reduces corrosion and deposit buildup. Keep an eye on the engine for any changes in consumption of oil or coolant, fuel mileage and performance. Look for signs of white residue at the cooler outlet end which indicates an internal coolant leak.

Technicians deal with these issues all the time. Here’s an article from Heavy Duty Trucking that provides some great information and tips on maintaining and servicing both EGR and DPF systems: Stay Ahead of Trouble on EGR Engines.