OEM Chevrolet HHR Thermostat Housing

Chevrolet HHR Thermostat Housing Parts and Q&A

• Thermostat Housing, Green Line
  12597172
  Q: How to replace the engine coolant thermostat housing on Chevrolet HHR?

  A:

  Begin the process of replacing the engine coolant Thermostat housing by draining the cooling system then uninstalling both the air cleaner assembly and bracket along with its nuts. Start by removing the Exhaust Heat Shield using stud removal. Remove the coolant from the engine block while using the water pump drain and secure the draining bolt tightly. Disconnect the engine coolant temperature (ECT) sensor electrical connector when working on vehicles with automatic transaxles. The procedure for a manual transaxle includes disconnecting both the ect sensor electrical connector and removing the ect sensor itself. Begin by loosening the outlet hose clamp then remove the radiator outlet hose and use tools to disconnect heater inlet and outlet hoses connecting to Thermostat housing pipes. Using a jack support the vehicle while you remove the bolts from the Thermostat housing and twist the water transfer pipe to separate it from the water pump. Start by taking off the Thermostat housing after which you need to remove the water transfer pipe when necessary with o-ring seals and Thermostat housing cover and Thermostat too. Remove any remaining debris and thread sealant from the engine Coolant Temperature Sensor and bolt holes when you reuse the housing. Insert a new Thermostat housing cover o-ring seal into the recess groove before fitting the Thermostat when needed then tighten the cover bolts to 10 n.m (89 lb in). The new Thermostat housing requires attachment to the engine gasket. Also apply slight coolant lubrication to the water feed pipe seals before installing new o-ring seals on the pipe. Put the water feed pipe into the Thermostat housing while aligning it with the water pump until the o-ring seal makes contact. Fasten the Thermostat housing to the engine through position it correctly then torques the bolts to 10 n.m (89 lb in). Lower the vehicle then seal the outlet and inlet hoses of the heater by tightening the clamps. Attach the radiator outlet hose to its clamp but put the ect sensor in place first and tighten it to 20 n.m (15 lb ft). Connect the ect sensor electrical connector based on the transaxle type then fix the ho2s electrical connector clip to the Thermostat housing. Start by checking vehicle level status and confirm drain valve closure before system filling and vehicle lowering. Reinstallation of the Exhaust Heat Shield requires studs to be tightened to 22 n.m (16 lb ft) and the completion of air cleaner bracket tightness to 10 n.m (89 lb in), and finally installation of the air cleaner assembly while confirming the repair and conducting leak tests.