OEM 2009 Cadillac XLR Thermostat Housing

2009 Cadillac XLR Thermostat Housing Parts and Q&A

• Q: How to Replace a Thermostat Housing (LC3) on 2009 Cadillac XLR?

  A: The replacement of the Thermostat Housing (LC3) must begin with draining both engine cooling and charge air cooling systems. The supercharger assembly must be removed before you detach the supercharger belt tensioner and the supercharger idler pulley. You must remove the two coolant hoses and the Radiator Hose which connect to the Thermostat Housing. Begin by repositioning the lower bypass hose clamp before removing the bolts that connect the Thermostat Housing to the cylinder heads. Extract the housing with bypass hose, discarding the gaskets at this time. Disassembly of the Thermostat Housing may be required for cleaning followed by an inspection. Assemble the Thermostat Housing as needed and place new gaskets before tightening housing and bypass hose installation onto the vehicle with bolts torqued to 25 nm (18 lb ft). Reset the bypass hose clamp in its proper position before reinstalling both radiator and coolant hoses to the Thermostat Housing. The supercharger idler pulley and supercharger belt tensioner and supercharger assembly must be reinstalled. Add coolant to both the charge air cooling system and engine cooling system before searching for fluid leaks in the systems.