Ensuring Expertise Built In , the OTR Radiator sustains the proper coolant fluid level for your heavy duty truck's engine. Symptoms of a bad radiator include layer of significant scaling within the radiator's internal passageways and clogged radiator tubes from debris in the coolant (such as metal shavings). Gain a better-than-OEM replacement design that improves airflow, coolant flow, and stagnation recovery for the heating system. This is possible thanks to the OTR re-engineering process which consists of virtual testing of failed units to reveal issues and improve upon the original design. As a result, this high-quality, reliable heavy duty radiator is built to tolerate large amounts of stress and heat over time. FleetPride is your First Click in Heavy Duty .