Show Search Menu

Donaldson Filters

Cooling systems are typically partial flow (by-pass) filters, with less than 10% of coolant flowing through the filter. We offer a range of filters designed to work in a variety of operating environments and maintenance schedules. Use of the correct filter is important to maintain the proper balance to prevent over-concentration (silicate dropout) or under-concentration, which leads to corrosion, liner pitting and other system problems.

Coolant Filters

There are 3 types of standard coolant filters.

  1. The pre-charge filter, which contains enough coolant additive to initially charge the cooling system and to allow for depletion to the first service interval.

  2. The standard charge spin-on filters which contain adequate chemical additive to maintain cooling systems between service intervals.

  3. Blank filters which contain no chemical additive and can be used with cooling systems maintained by liquid additive, systems using long-life coolants which require no additive, or on overcharged systems to help bring the additive back to the normal range.  Blank filters are not intended for use with water-only systems.


  • Organic acid coolant systems – Organic acid technology (OAT)
  • Hybrid coolant systems – blend of traditional and organic coolant 


  • Rugged design and materials for extra durability
  • Seals are constructed specifically to withstand extreme heat and cold

Available Media Type

  • Cellulose – cost-effectively meets application efficiency and capacity requirements
This servicing information is provided as a best practices guide. It is not intended to replace or supersede the service instructions supplied by your engine or equipment manufacturer.
  1. Remove radiator cap; use caution if hot or under pressure.

  2. Unscrew and remove old filter and gasket.
    Properly dispose of the used filter according to local regulations.

  3. Wipe filter head with clean cloth.

  4. Apply a thin film of clean motor oil to the gasket.

  5. Align threads and spin on filter until gasket contact.

  6. Follow icons on filter to tighten.

  7. Pour coolant mix into overflow.

  8. Start engine and check for leaks.

  9. Test coolant according to type.

Donaldson Coolant Filtration Overview

Donaldson coolant filters remove contaminants and maintain cooling system balance - both key to keeping your engine running efficiently. This module provides an in-depth look at engine coolant system considerations and the advantages of Donaldson coolant filters.

Donaldson Coolant Filter Servicing

Donaldson provides best practices and recommended steps for coolant filter servicing to help maintain a healthy engine coolant system.