Daewoo Matiz (2003 year). Manual - part 10

1D – 10 ENGINE COOLING

D102D503

D

Add the clean water to the surge tank (2).

5. Run the engine until the thermostat opens. You can

tell the thermostat is open when both radiator hoses
are hot to the touch.

6. Stop the engine and disconnect the lower radiator

hose to drain the coolant.

7. Repeat steps 3 through 6 until the drained water is

clear and free of coolant and rust.

Notice: Never use an antifreeze mixture more concen-
trated than 60 percent antifreeze to 40 percent water.
The solution freezing point increases above this con-
centration.

8. Fill the cooling system through the surge tank with a

mixture of ethylene glycol antifreeze and water. The
mixture must be at least 50 percent antifreeze, but
not more than 60 percent antifreeze for cold weather
operation.

9. Fill the surge tank to the specified MAX fill mark on

the outside of the tank.

10. Install the surge tank cap.

D102D504

SURGE TANK

Removal Procedure

Caution: To prevent personal injury, do not remove
the surge tank cap while the engine and the radiator
are hot, because the heat causes the system to re-
main under pressure scalding fluid and steam may
be blown out under pressure.

1. Drain the engine coolant to below the level of the

surge tank.

2. Remove the surge tank.

D

Loosen the overflow hose clamps and disconnect
the overflow hoses from the surge tank (1).

D

Remove the surge tank (2).

3. Clean the inside and the outside of the surge tank and

the surge tank cap with soap and water.

4. Rinse the surge tank and the cap thoroughly.

5. Check the surge tank and the cap for crack or other

damage.

ENGINE COOLING 1D – 11

D102D505

Installation Procedure

1. Install the surge tank to the vehicle.

D

Install the surge tank with pressing down (1).

D

Connect the overflow hoses to the surge tank (2).

2. Secure the overflow hoses to the surge tank with the

hose clamps.

3. Fill the surge tank with coolant to the MAX mark.

D102D506

ELECTRIC COOLING FAN

Removal Procedure

1. Disconnect the negative battery cable.

2. Remove the electric cooling fan assembly.

D

Disconnect the cooling fan electrical connector (1).

D

Remove the bolts (2).

D

Remove the electric cooling fan assembly (3).

3.5–4.5 N

S

m

D12D507A

Installation Procedure

1. Install the electric cooling fan assembly with the bolts.

Tighten

Tighten the bolts to 3.5–4.5 N

S

m (31–40 lb-in).

2. Connect the cooling fan electrical connector.

3. Connect the negative battery cable.

D12D5081

RADIATOR

Removal Procedure

1. Disconnect the negative battery cable.

2. Disconnect the lower radiator hose and drain the en-

gine cooling system. Refer to “Draining and Refilling
the Cooling System” in this section.

3. Disconnect the upper radiator hose and the surge

tank hose.

D

Loosen the upper radiator hose clamp and discon-
nect the upper radiator hose (1).

D

Loosen the surge tank hose clamp and disconnect
the surge tank hose (2).

1D – 12 ENGINE COOLING

D12D5091

4. Remove the electric cooling fan.

Refer to “Electric Cooling Fan” in this section.

5. Remove the radiator.

D

Remove the bolts (1).

D

Remove the radiator support brackets (2).

D

Remove the radiator (3).

6. Check the radiator for breaking, clog or other dam-

age.

Important: The radiator still contains a substantial
amount of coolant. Drain the remainder of the coolant
from the radiator into a drain pan.

D12D5101

Installation Procedure

1. Install the radiator with the mounting bolts (1) and the

support brackets (2).

Tighten

Tighten the support bracket bolts to 3.5–4.5 N

S

m

(31–40 lb-in).

2. Install the electric cooling fan.

Refer to “Electric Cooling Fan” in this section.

D12D5111

3. Connect the upper radiator hose to the radiator (1).

4. Connect the surge tank hose to the radiator (2).

5. Secure each hose with hose clamps.

6. Refill the engine cooling system. Refer to “Draining

and Refilling the Cooling System” in this section.

7. Connect the negative battery cable.

D102D512

THERMOSTAT (TYPICAL)

Removal Procedure

Caution: To prevent personal injury, do not remove
the surge tank cap while the engine and the radiator
are hot because the heat causes the system to re-
main under pressure. Scalding fluid and steam may
be blown out under pressure.

1. Remove air filter assembly. Refer to Section 1B,

SOHC Engine Mechanical.

2. Disconnect the lower radiator hose and drain the

coolant. Refer to “Drain and Refilling the Cooling Sys-
tem”

3. Disconnect the upper radiator hose.

ENGINE COOLING 1D – 13

D

Loosen the hose clamp (1).

D

Disconnect the upper radiator hose (2).

D102D513

4. Remove the thermostat.

D

Remove the bolts (1).

D

Remove the thermostat housing (2).

D

Remove the thermostat with the gasket (3).

5. Check the gasket for crack or other damage.

6. Inspect the valve seat for foreign matter that could

prevent the valve from seating properly.

7. Inspect the thermostat for proper operation. Refer to

“Thermostat Test” in this section.

8–15 N

S

m

D12D514A

Installation Procedure

1. Install the thermostat with the bolts and the thermo-

stat housing.

Tighten

Tighten the mounting bolts to 8–15 N

S

m (71–130

lb-in).

2. Secure the upper radiator hose to the thermostat

housing with a hose clamp.

3. Refill the engine cooling system. Refer to “Draining

and Refilling the Cooling System” in this section.

MAA1D010

THERMOSTAT (EURO III)

Removal Procedure

Caution: To prevent personal injury, do not remove
the surge tank cap while the engine and the radiator
are hot because the heat causes the system to re-
main under pressure. Scalding fluid and steam may
be blown out under pressure.

1. Remove air filter assembly. Refer to Section 1B,

SOHC Engine Mechanical.

2. Disconnect the lower radiator hose and drain the

coolant. Refer to “Drain and Refilling the Cooling Sys-
tem”

3. Disconnect the upper radiator hose.