1989 Freightliner FLA086 Engine: 14L L6; with 43in Long Belt; Position: Water Pump and Idler;. 1990 Freightliner FLA086 Engine: 14L L6; Position: Water Pump and Idler;. 1991 Freightliner FLA086 Engine: 14L L6; with 4 Rib Belt; Position: Water Pump and Idler;.