View 4 Photos View 0 Videos Mack E6 Fuel / Water Separator for a 1989 Mack MC688FC Contact for price (Used) 1989 Mack MC688FC, WATER SEPARATOR- Side: Passenger Right Side, Make: NAPA, Model: 3218, Engine: Mack E6, Reference images for condition, For more information about this item, give... ConditionUsedFits To Make(s)MackFits To Model(s)MC688FCWill Fit Year(s)1989Stock NumberP-500144 MLS Number14244290CategoryFuel / Water Separators Last Updated3/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info