RAM 2500 Truck 4WD L6-359 5.9L DSL Turbo VIN D FI (1998)
Fuel/Water Separator: Service and Repair
Replacement
Fig 63 Fuel Filter/Water Separator Location
FUEL FILTER/WATER SEPARATOR
Whenever the fuel filter is being replaced, the pre-filter in the fuel heater assembly should be removed and cleaned. Refer to Fuel Heater
Removal/Installation for procedures.
The fuel filter/water separator assembly is located on left/rear side of engine above starter motor. The assembly contains a fuel filter cartridge and
Water-In-Fuel (WIF) sensor.
REMOVAL
The canister drain valve serves two purposes. One is to partially drain the filter canister of excess water. The other is to completely drain the
canister for filter replacement.
DRAINING WATER FROM FILTER CANISTER: The filter should be drained whenever the water-in-fuel warning lamp remains
illuminated. (Note that the lamp will be illuminated for approximately two seconds when ignition key is initially placed in ON position for a bulb
check).
A drain hose is located at bottom of drain valve. Place a drain pan under drain hose. With engine not running, rotate valve handle forward to
DRAIN position. Hold drain valve open until all water and contaminants have been removed and clean fuel exits the drain hose. If fuel filter or
WIF sensor is being replaced, drain the canister completely. Dispose of mixture in drain pan according to applicable regulations. After draining
operation, rotate valve handle rearward to CLOSE position. If fuel filter or WIF sensor is being replaced, proceed to next step.
