Part Type: Engine Coolant Reservoir. Notes: Combined Coolant and Washer Fluid Reservoir. 2005 Dodge Ram 4000 Engine: 5.7LL V8; Combined Coolant and Washer Fluid Reservoir Position: Front;. 2006 Dodge Ram 4000 Engine: 5.7LL V8; Combined Coolant and Washer Fluid Reservoir Position: Front;.