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JamesH, Auto Service Technician
Category: Car
Satisfied Customers: 663
Experience:  Auto Sercive Tech
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How do I change the thermostat on my 2003 mazda protege 5?

Resolved Question:

How do I change the thermostat on my 2003 mazda protege 5?
Submitted: 7 years ago.
Category: Car
Expert:  JamesH replied 7 years ago.
The task takes a little under an hour to complete that cleaning the old gasket and also putting it back together. I have attached step by step instructions with photos. Please let me know if there is anything else I can do.


  1. Disconnect the negative battery cable.
  2. Remove the fresh air duct.
  3. Drain the engine coolant.

  1. Remove in the order indicated in the table.

  1. Install in the reverse order of removal.

  1. Install the thermostat into the thermostat case with the jiggle pin and projection at the top.
  2. Install the thermostat into the thermostat case, aligning the projection on the gasket to the thermostat case.


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