For over 100 years, Donaldson has been solving customers' complex filtration needs. Today, Donaldson is one of the largest providers of unique filtration technologies and high-quality filters and parts. 
It's estimated that 40 - 50% of engine downtime is due to coolant-system failure. With today's diesel engines, coolant balance is key to keeping your engine running efficiently. Your engine coolant battles rust, scale formation, acidity, foaming, silicate drop-out and debris while it works to transfer heat and maintain the right operating conditions for optimal fuel economy. Donaldson coolant filters allow you to choose the method that suits your maintenance practices and schedules.