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Thermostats
Mazda 323

How do you replace the thermostat on a 1991 Mazda 323?

Answer

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Wiki User
September 03, 2007 6:56PM

Should be located in a removable housing at the engine end of the upper radiator hose Drain about 1 gallon of coolant from the radiator

Remove this housing

Make note how thermostat is installed

Clean both surfaces

Replace thermostat and gasket

Re-fill coolant slowly to prevent an air lock

Start engine and look for leaks

Run engine to normal operating temperature with heater on

Re-check coolant level