Owner Maintenance- Page 261

2005 Mazda MAZDA3 4-Door Mazda3 Owners Manual

Model Year
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Table of Contents

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Black plate (261,1)

To change coolant

WARNING

Removing the Cooling System Cap:
Removing the cooling system cap
while the engine is running or hot is
dangerous. This might lead to cooling
system and engine damage and could
result in serious injury from escaping
hot coolant or steam. Turn off the
engine and wait until it's cool. Even
then, be very careful when removing
the cap.
Wrap a thick cloth around the cap and
slowly turn it counterclockwise about
two and a half rotations.
Step back while the pressure escapes.
When you're sure all the pressure has
escaped, turn the cap
counterclockwise

still using a cloth

and remove the cap.

1. Make sure the engine is not running

and it has cooled.

2. Remove the cooling system cap.

Loosen

Loosen

Tighten

Tighten

3. Remove the radiator drain plug and

drain the coolant into a suitable
container. Properly dispose of the used
coolant.

4. Flush out the system with running

water.

5. Drain the system completely. Insert and

tighten the plug. Add as much
ethylene-glycol-based coolant mixture
and water as necessary to provide
freezing and corrosion protection.

6. In extremely cold climates, add the

mixture percentage recommended in
the coolant mixture percentage table.

7. Run the engine at idle with the cooling

system cap off. Slowly add additional
coolant if necessary.

8. At this point, wait until the engine

reaches normal operating temperature;
then depress the accelerator two or
three times. Add more coolant, if
necessary, until the system is full.

9. Install the cooling system cap. Inspect

all connections for leaks. Inspect the
level in the coolant reservoir one more
time and verify that the coolant level is
between the F and L marks.

Maintenance and Care

Owner Maintenance

8-19

Mazda3_8T96-EA-04J_Edition3 Page261
Wednesday, May 11 2005 3:39 PM

Form No.8T96-EA-04J

Detailed Information for 2005 Mazda MAZDA3 4-Door Mazda3 Owners Manual

Lists of information found in 2005 Mazda MAZDA3 4-Door Mazda3 Owners Manual - Page 261

  • 1. Make sure the engine is not running and it has cooled.
  • 2. Remove the cooling system cap.
  • 3. Remove the radiator drain plug and drain the coolant into a suitable container.
  • 4. Flush out the system with running water.
  • 5. Drain the system completely.
  • 6. In extremely cold climates, add the mixture percentage recommended in the coolant mixture percentage table.
  • 7. Run the engine at idle with the cooling system cap off.
  • 8. At this point, wait until the engine reaches normal operating temperature; then depress the accelerator two or three times.
  • 9. Install the cooling system cap.

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