Most cooling system hoses use "constant tension" hose clamps. When removing or installing, use a tool designed for servicing this type of clamp. The clamps are stamped with a letter or number on the tongue. If replacement is necessary, use only an OEM clamp with a matching ID.
Always wear safety glasses when servicing contact tension clamps.
- Locate the thermostat. This is located in a housing on the engine side of the upper radiator hose for all engines except the 3.7L and 4.7L. On these engines, the thermostat is located on the engine side of the lower radiator hose.
- Disconnect the negative battery cable.
- Drain the engine coolant from the block until the level is below the thermostat.
- On most V-6 and V-8 models the alternator must be removed or repositioned for access to the thermostat housing.
- Remove the radiator hose from the thermostat housing.
- Disconnect any sensors fitted to the thermostat housing.
- Remove the retaining bolts from the thermostat housing. Note lengths of each for ease of installation.
- Remove the thermostat housing, thermostat, and gasket, if fitted.
Note the relative positions of all components, especially gaskets and seals. Note the orientation of the thermostat in the housing.