1. Disconnect negative battery cables. Remove necessary air intake components for access to fuel filter/water separator as necessary. Fuel filter/water separator is located on top of engine, between valve covers. See Fig. 47.
2. Place suitable drain pan below water drain line at bottom of fuel filter/water separator housing. Rotate water drain lever away from fuel filter/water separator housing and allow fuel to drain. Disconnect fuel supply and return lines from filter/separator.
3. Remove 2 fuel supply hoses connecting regulator block to both cylinder heads. Disconnect clip for wiring harness from side of fuel filter/water separator housing. Disconnect necessary electrical connectors for removal of fuel filter/water separator housing. Remove bolts and fuel filter/water separator housing.