Replacing thermostat in 91 240 gl
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Follow the upper radiator hose from the radiator to the thermostat housing.
Remove the two 10mm nuts that secure the housing to the cylinder head. Remove the housing, be prepared for some fluid to come out, and the thermostat is right there. Make sure to install a new seal.
If your new thermostat has an air vent make sure the vent is positioned at the top of the thermostat.
That's pretty much it. Top off your fluid as needed.
Remove the two 10mm nuts that secure the housing to the cylinder head. Remove the housing, be prepared for some fluid to come out, and the thermostat is right there. Make sure to install a new seal.
If your new thermostat has an air vent make sure the vent is positioned at the top of the thermostat.
That's pretty much it. Top off your fluid as needed.
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