- Replacement Thermostat
- Thermostat Housing Gasket
- 5/8-Inch and 3/8-Inch Socket Wrenches
- Extension Bars
- Phillips Head Screwdriver
- Funnel
- Clean Rags
- Coolant/Antifreeze (mix the coolant with the correct ratio of water according to the manufacturer's instructions)
Steps:
1. Park your car on a level surface and turn off the engine. Allow it to cool down completely.
2. Open the hood and identify the thermostat housing. Consult a service manual or online resource to find its exact location in your specific vehicle.
3. Disconnect the negative terminal of your car's battery. This will help prevent any potential electrical issues while you work.
4. Locate the coolant drain plug on the radiator or coolant tank. Consult the service manual for its exact location. Place a large container underneath to collect the drained coolant.
5. Open the coolant drain plug to allow the coolant to drain. If there's no drain plug, you can also disconnect the lower radiator hose using the 3/8-inch socket wrench to drain the coolant.
6. Locate the thermostat housing bolts using your socket wrench and disconnect them. Be careful not to drop them into the engine bay.
7. Remove the thermostat housing cover by carefully pulling it off. The old thermostat should be visible beneath the housing.
8. Carefully pry out the old thermostat from the housing using a screwdriver or needle nose pliers. Be cautious not to damage the sealing surface.
9. Clean the thermostat housing and seating surface with a clean rag. Remove any old residues or dirt.
10. Install the new thermostat into the housing, ensuring it sits properly in the designated seat.
11. Replace the thermostat housing cover and secure it back with the bolts. Tighten the bolts using a socket wrench.
12. Reconnect the lower radiator hose (if removed earlier) or close the coolant drain plug to stop draining.
13. Carefully pour the pre-mixed coolant/antifreeze into the radiator or coolant reservoir until the level reaches the "Full" mark.
14. Let the engine run for a few minutes while observing the temperature gauge. Check for any leaks around the thermostat housing or hoses.
15. Turn off the engine and inspect the coolant level again once it's cooled down. Replenish if needed.
16. Reconnect the negative terminal of the car battery.
Note: The steps mentioned above are general and may vary slightly based on your specific Mazda 929 model. Always refer to a service manual or consult with a qualified mechanic if you are unsure or encounter any difficulties during the process.
