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CAUTION
Radiator coolant will damage paint.
Rinse it off quickly if spilled.
If the coolant reservoir is empty or new
coolant is required frequently, consult an
Authorized Mazda Dealer.
qChanging Coolant
Change coolant according to Scheduled
Maintenance (page 8-3).
CAUTION
lUse only soft (demineralized) water
in the coolant mixture. Water that
contains minerals will cut down on
the coolant's effectiveness.
lDon't add only water. Always add a
proper coolant mixture.
lThe engine has aluminum parts and
must be protected by an ethylene-
glycol-based coolant to prevent
corrosion and freezing.
lDO NOT USE coolants Containing
Alcohol, methanol, Borate or
Silicate.
These coolants could damage the
cooling system.
lDO NOT MIX alcohol or methanol
with the coolant. This could damage
the cooling system.
lDon't use a solution that contains
more than 60% antifreeze.
This would reduce effectiveness.
NOTE
If the“FL22”mark is shown on or near
the cooling system cap, use FL22 type
engine coolant. If engine coolant other
than FL22 type is used, the engine
coolant must be replaced earlier than
the specified replacement interval
indicated in the scheduled maintenance
(page 8-3).
Except FL22 type
For mixture percentage:
ProtectionVolume
Antifreeze
solutionDemineral-
ized water
Above_
16°C (3°F) 35% 65%
Above_
26°C (_
15°F) 45% 55%
Above_
40°C (_
40°F) 55% 45%
FL22 type
FL22 type engine coolant concentration is
factory adjusted. Use the product as it is
without diluting it.
Maintenance and Care
Owner Maintenance
8-19
MX-5_8U35-EA-05F_Edition1 Page277
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Form No.8U35-EA-05F
Page 278 of 366

Black plate (278,1)
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 to the first stop.
Step back while the pressure escapes.
When you're sure all the pressure is
gone, press down on the cap―still
using a cloth―turn the cap, and
remove it.
1. Make sure the engine is not running
and it has cooled.
2. Remove the cooling system cap.
TightenTighten
LoosenLoosen
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.
8-20
Maintenance and Care
Owner Maintenance
MX-5_8U35-EA-05F_Edition1 Page278
Monday, April 18 2005 4:20 PM
Form No.8U35-EA-05F
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Black plate (280,1)
Power Steering Fluid
qInspecting Power Steering Fluid
Level
CAUTION
To avoid damage to the power steering
pump, don't operate the vehicle for long
periods when the power steering fluid
level is low.
NOTE
Use specified power steering fluid
(page 10-4).
Inspect the fluid level in the reservoir at
each engine oil change with the engine off
and cold. Add fluid if necessary; it does
not require periodic changing.
The level must be kept between MIN and
MAX.
Visually examine the lines and hoses for
leaks and damage.
If new fluid is required frequently, consult
an Authorized Mazda Dealer.
Washer Fluid
qInspecting Washer Fluid Level
WARNING
Substitute Washer Fluid:
Using radiator antifreeze as washer
fluid is dangerous. If sprayed on the
windshield, it will dirty the windshield,
affect your visibility, and could result
in an accident. Use only windshield
washer fluid or plain water in the
reservoir.
Using Washer Fluid Without Anti-
freeze Protection in Cold Weather:
Operating your vehicle in
temperatures below 4 degrees C (40
degrees F) using washer fluid without
anti-freeze protection is dangerous as
it could cause impaired windshield
vision and result in an accident. In
cold weather, always use washer fluid
with anti-freeze protection.
NOTE
State or local regulations may restrict
the use of volatile organic compounds
(VOCs), which are commonly used as
anti-freeze agents in washer fluid. A
washer fluid with limited VOC content
should be used only if it provides
adequate freeze resistance for all
regions and climates in which the
vehicle will be operated.
8-22
Maintenance and Care
Owner Maintenance
MX-5_8U35-EA-05F_Edition1 Page280
Monday, April 18 2005 4:20 PM
Form No.8U35-EA-05F