Engine Coolant Thermostat Housing. Thermostat Housing. The engine types may include 4.0L 245Cu. V6 FLEX SOHC Naturally Aspirated,4.0L 245Cu. V6 GAS SOHC Naturally Aspirated. This part fits vehicles made in the following years 200 1,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011.