Coolant Replacement
1. Radiator Cap - Remove
1.
Wait until the engine is cool, then carefully remove the radiator cap.

3. Engine Coolant - Drain
1.
Loosen the drain plug (A), and drain the coolant.

4. Cylinder Block Coolant - Drain
1.
Remove the drain bolt (A).
2.
After the coolant has drained, reinstall the drain bolt with a new washer (B).
3.
Tighten the radiator drain plug securely.

5. Coolant Reservoir - Refill
1.
Remove, drain and reinstall the coolant reservoir.
2.
Fill the coolant reservoir to the MAX mark with Honda Long Life Antifreeze/Coolant Type 2.

6. Engine Coolant - Refill

Follow the chart and pour coolant into the radiator up to the base of the filler neck.

NOTE:
Use Honda Long Life Antifreeze/Coolant Type 2, and if necessary add Honda Extreme Cold Weather Antifreeze/Coolant Type 2 (concentrate). Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail.
Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Honda Extreme Cold Weather Antifreeze/Coolant Type 2 is a 100 % concentration coolant. Do not add water to either coolant.
If the vehicle is regularly driven in very low temperatures (below -22 °F (-30 °C)), a 60 % concentration of coolant should be used.

Operation
Vehicle Usage (Desired Mixture)
Current Mixture
Coolant Drain
Add Amount of Honda Extreme Cold Weather Antifreeze/Coolant Type 2
(100 % concentrate)
Then add Acura Long Life Antifreeze/Coolant Type 2 (50/50)
Coolant Change
Normal Area (50/50)
50/50
60/40
unknown
Drain radiator, engine block, and reservoir
None
Top off the cooling system
Very Cold Area (60/40)
50/50
unknown
Drain radiator, engine block, and reservoir
About 0.94 L (32 fl oz)
60/40
About 0.76 L (26 fl oz)
Engine Overhaul
Normal Area (50/50)
-
-
None
Very Cold Area (60/40)
-
-
About 0.94 L (32 fl oz)
Coolant Winterizing
Very Cold Area (60/40)
50/50
Drain about 2.0 L(68 fl oz) from radiator
About 0.94 L (32 fl oz)
unknown*
Drain radiator, engine block, and reservoir

*: When you want to winterize the coolant with the minimum amount of coolant change but the current coolant concentration in the vehicle is unknown, you must drain all coolant from the cooling system.

Engine Coolant Refill Capacities (Including the coolant reservoir capacity of 0.5 L (0.13 US gal))
At Coolant Change
M/T:
3.8 L (1.00 US gal)
CVT:
3.8 L (1.00 US gal)
After Engine Overhaul
M/T:
4.7 L (1.24 US gal)
CVT:
4.8 L (1.27 US gal)


7. Engine Coolant - Air Bleeding
1.
Loosely install the radiator cap.
2.
Start the engine, and let it run until it warms up (the radiator fan comes on at least twice).
NOTE: Do not operate the air conditioning system.
3.
Turn off the engine. Check the level in the radiator, and add Honda Long Life Antifreeze/Coolant Type 2, if needed.

8. Engine Coolant Leak - Check

1.
Put the radiator cap securely, then start the engine again, and check for leaks.
2.
Clean up any spilled engine coolant.

10. Maintenance Minder - Reset (With Maintenance Minder System)

If the Maintenance Minder required to replace the engine coolant, reset the Maintenance Minder with the gauge (see "Resetting the Maintenance Minder"). If the Maintenance Minder did not require to replace the engine coolant, reset the Maintenance Minder with the HDS (see "Resetting the Individual Maintenance Items").