To change the thermostat on a 1987 Chevy van, drain the radiator and locate the thermostat under the upper host assembly. Remove the bolts holding the thermostat in and replace it.
# Drain the radiator below the thermostat level # Remove the water outlet elbow assembly from the engine and the remove the thermostat
Drain the radiator. The thermostat is in a housing connected to the water pump. Remove the housing to replace the thermostat and gasket.
Drain the radiator down 1/2 way. At the engine end of the top radiator hose is the thermostat housing. Remove the housing and install a new thermostat.
The thermostat should be on the top of the engine under the water inlet. Drain the radiator. Remove the top radiator hose from the inlet. Unbolt the inlet, and pull the thermostat out for replacement.
Drain the Cavaliers radiator. Remove the top radiator hose, and the inlet pipe. Take the thermostat out from under the inlet pipe and replace it. Reinstall the pipe and hose, then refill the radiator.
Drain the radiator. Remove the top hose, and the water inlet. Remove the thermostat from under the inlet, and replace it. Reverse the steps to finish the installation.
Drain the radiator into a container. Remove the upper radiator hose at the engine and remove the 2 bolts in the thermostat housing. Remove the thermostat and clean the surfaces. Install the new thermostat ,upper radiator hose and refill the radiator.
To change the thermostat on a 97 Chevy Tahoe, drain the radiator. Locate the part under the upper hose register and loosen the screw holding it in place. Replace it by putting in the new part and bolting it back down.
Drain the vans radiator. Remove the top radiator hose and water inlet. take the thermostat out. Put in the new thermostat and re install the inlet and hose. Refill the radiator.
Follow the upper radiator hose from the radiator to the engine. It will lead you to the thermostat housing. Drain coolant from radiator, remove upper radiator hose from engine, remove the two bolts holding the thermostat housing to engine, remove housing, remove thermostat.
Drain the 90 Astros radiator into a pan. Dispose of the coolant properly as it is toxic to animals. Remove the top radiator hose and water inlet. Remove the thermostat from under the inlet and replace. reverse the procedures to finish the installation.