Fuel Filters

The prefilter is housed within the fuel filter module. The prefilter element filters out large particles and is fastened onto the prefilter cap. The final filter is housed within the fuel filter module. The final filter has the task of separating out the water contained in the fuel and also filtering out small particles. The final filter is fastened onto the final filter cap. Fuel filters should be replaced per the maintenance intervals; see Preventive Maintenance Tables.

Incorporated into the fuel filter module is a coalescer. The coalescer removes water and/or sediment .Water in fuel can seriously affect engine performance and may cause engine damage. A water-in-fuel (WIF) dash indicator will warn the driver when trapped water needs to be drained. For instruction on how to drain the fuel coalescer, see How to Drain the Fuel Coalescer.