4.2 LITER. Plug. A Plug that allows the coolant to be removed from the pump. Engine Oil Drain Plug. From Chassis/VIN 4F-6-190 001. From Chassis/VIN 8E-6-285 001. Removable Plug located in the Thermostat Housing that allows to Drain the Engine Coolant. To 09/08/2015. Coolant Thermostat Housing. Oil Pan. Water Pump. Sealing. Included with: Lower Oil Pan, Lower Oil Pan Part cannot be reused/reinstalled, Thermostat unit.