Honda Civic manuals

Honda Civic Service Manual: Coolant Replacement (R18A9)

Honda Civic Service Manual / Powertrain / Engine / Engine Cooling / Coolant Replacement (R18A9)

1. Radiator Cap

1.

Wait until the engine is cool, then carefully remove the radiator cap.


2. Vehicle Lift

1.

Raise the vehicle on a lift, and make sure it is securely supported.


3. Radiator Coolant - Replacement

1.

Loosen the drain plug (A), and drain the coolant.


4. Cylinder Block Coolant - Drain (Except K24Z7 engine )

1.5mmn-mm


Except K24Z7 engine


1.

Remove the drain bolt (A) from the rear side of the engine block.


2.

After the coolant has drained, reinstall the drain bolt with a new washer.


3.

Tighten the radiator drain plug securely.


1. Radiator Coolant - Replacement (Natural Gas Model)

1.

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 Honda 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 1.3 L (44 fl oz)

60/40

About 1.1 L (37 fl oz)

Engine Overhaul

Normal Area (50/50)

-

-

None

Very Cold Area (60/40)

-

-

About 1.1 L (37 fl oz)

Coolant Winterizing

Very Cold Area (60/40)

50/50

Drain about 2.0 L (68 fl oz) from radiator

About 1.1 L (37 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 Capacities (Including the coolant reservoir capacity of 0.475 L (0.1255 US gal))


At Coolant Change

5.50 L (1.453 US gal)

After Engine Overhaul

6.51 L (1.720 US gal)


2. HDS DLC - Connection


1.

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.


2.

Turn the ignition switch to ON (II).


3.

Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.


3. Maintenance Minder Reset

1.

After doing all procedures, select the individual maintenance item you wish to reset with the HDS..


Engine Cooling
...

Water Passage Removal and Installation (K24Z7)
1211F4 1. Radiator Cap 1. Wait until the engine is cool, then carefully remove the radiator cap. ...

See also:

Honda Civic Service Manual. Passenger's Kick Panel Removal and Installation
8571G4 PASSENGER SIDE Removal 1. Front Door Sill Trim - 4-Door 1. Remove the front door sill trim (A). 2. Front Door Sill Trim - 2-Door ...

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