THE VOL. 65 ISSUE 4 * JULY/AUGUST 2022 COOLING JOURNAL FOR THE AUTOMOTIVE & INDUSTRIAL HEAT EXCHANGE AND DIESEL EMISSIONS INDUSTRIES NARSA International Heat Transfer Association MEMBER SPOTLIGHT: ROPPEL INDUSTRIES page 6 IDEA International Diesel Emissions Association NARSA International Tour Heads to United Kingdom page 4 Troubleshooting Overloaded or Failed Filters page 21