Application	Description	Unit	Standard
Cooling System	Cooling Type	-	Forced Water Cooling
Coolant	Coolant Capacity	L/qt	1.4D/1.6D: 7.2 / 7.93 1.8D: 7.5
Termostat	Thermostat Type	-	Wax Expansion Pellet Type
	Temperature(opened initially)	°C (°F)	83 ± 2 (188.7 ± 35.6)
	Temperature(perfectly opened)	°C (°F)	102 (216)
	Temperature(perfectly closed)	°C (°F)	82 (180)
	Stroke(perfectly opened)	mm (in.)	7 (0.28)
Electric Cooling Fan	Cooling Fan Type	-	Electric
	Blade Number	EA	5
	Cooling Fan Diameter	mm (in.)	320(12.600)
	Temperature At Low Speed ON	°C (°F)	96 (204.8)
	Temperature At Low Speed OFF	°C (°F)	94.5 (202.1)
	Temperature At High Speed ON	°C (°F)	99 (210.2)
	Temperature At High Speed OFF	°C (°F)	97.5 (207.52)
Surge Tank	Open Pressure of The Pressure Valve	kPa(psi)	117.7~147.1(17.07~21.34)
	Open Pressure of The Vacuum Valve	kPa(psi)	9.8(1.42)
Coolant Pump	Water Pump Type	-	Centrifugal
	Impeller Diameter	mm (in.)	55(2.17)
	Impeller Blade Number	EA	11

Application	N•m	Lb-Ft	Lb-In
Water Pump Mounting Bolts (1.4L/1.6L DOHC)	10	-	89
Water Pump Mounting Bolts (1.8L DOHC)	8	-	71
Fan Assembly Mounting Bolts	4	-	35
Fan Motor Nut	3.2	-	28
Fan Motor Retaining Screws	4	-	35
Radiator Retaining Bolts, Upper Left and Upper Right	8	-	71
Surge Tank Attaching Bolt	5	-	44
Thermostat Housing Mounting Bolts	20	15	-

1. Remove the thermostat from the vehicle. Refer to "Thermostat" in this section.
2. Make sure the valve spring is tight when the thermostat is fully closed. If the spring is not tight, replace the thermostat.
3. Suspend the thermostat and a thermometer in a pan of 50/50 mixture of ethylene glycol and water. Do not let the thermostat or the thermometer rest on the bottom of the pan because the uneven concentration of heat on the bottom could result in inaccurate temperature measurements.
4. Heat the pan on a burner.
5. Use the thermometer to measure the temperature of the heated solution.
6. The thermostat should begin to open at 87°C (189°F) and it should be fully open at 102°C (216°F). If it does not open at these temperatures, replace the thermostat.

Checks	Action
Check for a loss of the coolant.	Add the coolant.
Check for a weak coolant solution.	Confirm that the coolant solution is a 50/50 mixture of ethylene glycol and water.
Check the front of the radiator for any dirt, any leaves, or any insects.	Clean the front of the radiator.
Check for leakage from the hoses, the coolant pump, the heater, the thermostat housing, the radiator, the core plugs, or the head gasket.	Replace any damaged components.
Check for a faulty thermostat.	Replace a damaged thermostat.
Check for retarded ignition timing.	Perform an ECM code diagnosis. Confirm the integrity of the timing belt.
Check for an improperly operating electric cooling fan.	Replace the electric cooling fan.
Check for radiator hoses that are plugged or rotted.	Replace any damaged radiator hoses.
Check for a faulty water pump.	Replace a faulty water pump.
Check for a faulty surge tank cap.	Replace a faulty surge tank cap.
Check for a cylinder head or an engine block that is cracked or plugged.	Repair the damaged cylinder head or the damaged engine block.

Checks	Action
Check for a leak in the radiator.	Replace a damaged radiator.
Check for a leak in the following locations: Surge tank. Hose.	Replace the following parts, as needed: Surge tank. Hose.
Check for loose or damaged radiator hoses, heater hoses, and connections.	Reseat the hoses. Replace the hoses or the clamps.
Check for leaks in the coolant pump seal.	Replace the coolant pump seal.
Check for leaks in the coolant pump gasket.	Replace the coolant pump gasket.
Check for an improper cylinder head torque.	Tighten the cylinder head bolts to specifications. Replace the cylinder head gasket, if needed.
Check for leaks in the following locations: Intake manifold. Cylinder head gasket. Cylinder block plug. Heater core. Radiator drain plug.	Repair or replace any components, as needed, to correct the leak.

Checks	Action
Check to determine if the thermostat is stuck open or is the wrong type of thermostat.	Install a new thermostat of the correct type and heat range.
Check the coolant level to determine if it is below the MIN mark on the surge tank.	Add sufficient coolant to raise the fluid to the specified mark on the surge tank.

1. Holder Transmission Fluid Pipe (Automatic Transmission Only)
2. Upper Radiator Bumper
3. Front Upper Center Panel
4. Radiator
5. Lower Radiator Bumper
6. Spring Clamp
7. Upper Radiator Hose
8. Main Cooling Fan
9. Auxiliary Cooling Fan
10. Drain Cock

1. Cylinder Block Seal Ring
2. Seal Ring
3. Thermostat Housing
4. Bolt
5. Bolt
6. Water Pump

1. Seal Ring
2. Thermostat
3. Thermostat Housing
4. Thermostat Housing Mounting Bolt
5. Coolant Pump Mounting Bolt
6. Coolant Pump
7. Seal Ring

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Caution : Do not remove the surge tank cap while the engine and the radiator are hot. Scalding fluid and steam may be blown out under pressure.
1. Place a pan below the vehicle to catch the draining coolant.
2. Remove the surge tank cap.
3. Unplug the drain cock.



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Caution : Dispose of the used coolant to a used coolant holding tank to be picked up with the used oil for disposal. Never pour the used coolant down the drain. Ethylene glycol antifreeze is an extremely toxic chemical. Disposing of it into the sewer system or the ground water can contaminate the local environment.
4. Catch the escaping fluid in a drain pan.
5. Remove all sludge and dirt from inside the surge tank. Refer to "Surge Tank" in this section.
6. Plug the drain cock.
7. Add the clean water to the surge tank.
8. Fill the tank slowly so that the upper reservoir hose remains above the water line. This allows the air inside the cooling system to escape.
9. Start the engine.
10. Run the engine until the thermostat opens. You can tell the thermostat is open when both radiator hoses are hot to the touch.



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11. Stop the engine.
12. Repeat Steps 1 through 9 until the drained water is clear and free of coolant and rust.
Notice : Never use an antifreeze mixture more concentrated than 60 percent antifreeze to 40 percent water. The solution freezing point increases above this concentration.
13. 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.
14. Fill the surge tank to the specified MAX fill mark on the outside of the tank.

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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 remain under pressure. Scalding fluid and steam may be blown out under pressure.
1. Drain the coolant. Refer to "Draining and Refilling the Cooling System" in this section.
2. Loosen the hose clamp on the upper radiator hose at the thermostat housing.
3. Disconnect the upper radiator hose from the thermostat housing.
4. Loosen the clamp on the bypass hose.
5. Disconnect the bypass hose from the thermostat housing.



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6. Remove the mounting bolts that hold the thermostat housing to the cylinder head.
7. Remove the thermostat housing from the head.
8. Remove the O-ring seal from the head.
9. Check the valve seat for foreign matter that could prevent the valve from seating properly.
10. Check the thermostat for proper operation. Refer to "Thermostat Test" in this section.
11. Clean the thermostat housing and the cylinder head mating surfaces.

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1. Coat the sealing surface of a new O-ring seal with Lubriplater®.
2. Install a new O-ring seal into the recess in the cylinder head.
3. Secure the thermostat housing to the cylinder head with the mounting bolts.
Tighten
Tighten the thermostat housing mounting bolts to 20 N•m (15 lb-ft).




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4. Connect the upper radiator hose to the thermostat housing.
5. Secure the upper radiator hose to the thermostat housing with a hose clamp.
6. Connect the bypass hose to the thermostat housing.
7. Secure the bypass hose with a hose clamp.
8. Refill the engine cooling system. Refer to "Draining and Refilling the Cooling System" in this section.

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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 remain under pressure. Scaling fluid and steam may be blown out under pressure.
1. Remove the engine cover.Refer to Section 1C2, 1.8L DOHC Engine Mechanical.
2. Drain the coolant. Refer to "Draining and Refilling the Cooling System" in this Section.
3. Disconnect the ECT sensor connector.
4. Disconnect the radiator upper hose.
5. Disconnect the throttle body inlet hose.
6. Remove the thermostat housing and thermostat.

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1. Install the thermostat housing to the cylinder head.
Notice : Coat the sealing surface of a new seal ring with Lubriplater.
Tighten
Tighten the thermostat housing mounting bolts to 20 N•m (15 lb-ft).

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1. Drain the engine cooling system to a level below the thermostat housing. Refer to "Draining and Refilling the Cooling System" in this section.
2. Remove the timing belt. Refer to Section 1C DOHC Engine Mechanical.
3. Remove the timing belt tension roller retaining bolt.
4. Remove the timing belt tension roller.



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5. Remove the water pump mounting bolts.
6. Remove the water pump from the engine block.
7. Remove the ring seal from the water pump.

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1. Inspect the water pump body for cracks and leaks.
2. Inspect the water pump bearing for play or abnormal noise.
3. Inspect the water pump pulley for excessive wear. If the water pump is defective, replace the water pump as a unit.
4. Clean the mating surfaces of the water pump and the engine block.

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1. Install a new ring seal to the water pump.
2. Coat the sealing surface of the ring seal with Lubriplater®.
3. Install the water pump to the engine block with the flange aligned with the recess of the rear timing belt cover.
4. Secure the water pump to the engine block with the mounting bolts.
Tighten
Tighten the water pump mounting bolts to 10 N•m (89 lb-ft). (1.4/1.6L DOHC)
Tighten the water pump mounting bolts to 8 N•m (71 lb-in). (1.8L DOHC)




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5. Install the timing belt tension roller to the oil pump with the flange inserted into the recess of the oil pump.
6. Install the timing belt tension roller bolt. Do not tighten the bolt at this time.
7. Install the timing belt. Refer to Section 1C, DOHC Engine Mechanical.
8. Refill the engine cooling system. Refer to "Draining and Refilling the Cooling System" in this section.

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1. Disconnect the negative battery cable.
2. Disconnect the cooling fan electrical connector.
3. Remove the fan shroud mounting bolts.
4. Lift the fan shroud assembly upward, and remove the fan shroud assembly from the vehicle.



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5. Remove the fan blade from the fan shroud assembly by removing the nut at the center of the fan hub.
6. Turn over the fan shroud assembly.



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7. Remove the fan motor retaining screws.
8. Remove the fan motor from the shroud.

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Caution : If a fan blade is bent or damaged in any way, no attempt should be made to repair or reuse the damaged part. A bent or damaged fan assembly must be replaced with a new fan assembly. It is essential that fan assemblies remain in proper balance. A fan assembly that is not in proper balance can fail and fly apart during use, creating extreme danger. Proper balance cannot be assured on a fan assembly that has been bent or damaged.
1. Install the fan motor to the shroud.
2. Secure the motor to the shroud with the retaining screws.
Tighten
Tighten the fan motor retaining screws to 4 N•m (35 lb-in).


3. Turn over the fan shroud assembly.



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4. Install the fan to the fan shroud assembly with the single nut in the center of the fan hub.
Tighten
Tighten the fan motor nut to 3.2 N•m (28 lb-in).




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5. Install the fan shroud assembly to the radiator.
Important : Be careful to seat the mounting post on the fan shroud into the socket at the radiator left tank. Be sure to slip the tab at the bottom edge of the shroud into the retaining clip near the center of the radiator.
6. Secure the shroud to the top of the radiator with the mounting bolts.
Tighten
Tighten the fan assembly mounting bolts to 4 N•m (35 lb-in).


7. Connect the cooling fan electrical connector.
8. Connect the negative battery cable.

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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 remain 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. Loosen the return hose clamp and disconnect the return hose from the top of the surge tank.
3. Loosen the throttle body hose clamp and disconnect the throttle body hose from the top of the surge tank.
4. Loosen the feed hose clamp and disconnect the feed hose from the bottom of the surge tank.



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5. Remove the surge tank attaching bolt.
6. Remove the surge tank from the support mount.
7. Clean the inside and the outside of the surge tank and the surge tank cap with soap and water.
8. Rinse the surge tank and the cap thoroughly.

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1. Install the surge tank to the support mount.
2. Secure the surge tank with the attaching bolt.
Tighten
Tighten the surge tank attaching bolt to 5 N•m (44 lb-in).




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3. Connect the return hose and the throttle body hose to the top of the surge tank.
4. Connect the feed hose to the bottom of the surge tank.
5. Secure the return hose, the throttle body hose, and the feed hose to the surge tank with the hose clamps.
6. Fill the surge tank with the coolant to the center ridge, or to the MAX mark.

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1. Disconnect the negative battery cable.
2. Drain the engine cooling system. Refer to "Draining and Refilling the Cooling System" in this section.
3. Remove the main and the auxiliary cooling fans. Refer to "Electric Cooling Fan - Main or Auxiliary" in this section.
4. Remove the upper radiator retaining bolt.
5. Remove the upper radiator retaining bracket.
6. Remove the upper radiator hose clamp.
7. Disconnect the upper radiator hose from the radiator.



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8. Remove the hose clamp from the surge tank hose at the radiator.
9. Disconnect the surge tank hose from the radiator.
10. Remove the lower radiator hose clamp.
11. Disconnect the lower radiator hose from the radiator.
12. Disconnect the transaxle cooler pipes from the lower radiator tank, if equipped.
13. Remove the bolt and the transaxle pipe support clamp from the radiator.
14. Remove the radiator from the vehicle.
Important : The radiator still contains a substantial amount of coolant. Drain the remainder of the coolant from the radiator into a drain pan.

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1. Set the radiator into place in the vehicle with the radiator bottom posts in the rubber shock bumpers.



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2. Connect the transaxle cooler pipes to the lower radiator tank, if equipped.
3. Install the transaxle pipe and support clamp to the radiator with a bolt.
4. Connect the surge tank hose to the radiator.
5. Secure the surge tank hose with a hose clamp.
6. Connect the upper radiator hose and the lower radiator hose to the radiator.
7. Secure each hose with a hose clamp.
8. Position the radiator retainers in place.
9. Install the upper radiator retainer bracket.
10. Install the upper radiator retaining bolt.
11. Install the main and the auxiliary cooling fans. Refer to "Electric Cooling Fan - Main or Auxiliary" in this section.
12. Refill the engine cooling system. Refer to "Draining and Refilling the Cooling System" in this section.
13. Connect the negative battery cable.
Tighten
Tighten the radiator retaining bolt to 8 N•m (71 lb-in).

• The cooling fans are actuated by the electronic control module (ECM) using a low-speed cooling fan relay and a high-speed cooling fan relay. On A/C-equipped vehicles, a series/parallel cooling fan relay is also used.
• The ECM will turn the cooling fans on at low speed when the coolant temperature reaches 97.5°C (207.5°F) and the cooling fans off at 95.25°C (203.4°F).

• The cooling fans are actuated by the electronic control module (ECM) using a low-speed cooling fan relay and a high-speed cooling fan relay. On A/C-equipped vehicles, a series/parallel cooling fan relay is also used.
• The ECM will turn the cooling fans on at low speed when the coolant temperature reaches 93°C (199°F) and the cooling fans off at 90°C (194°F).

• The ECM will turn the cooling fans on at low speed when the A/C system is on. The ECM will change to high speed when the coolant temperature reaches 101.25°C (214°F) or the high side A/C pressure reaches 1859 kPa (270 psi).
• The cooling fans will return to low speed when the coolant temperature reaches 99°C (210°F) and the high side A/C pressure reaches 1449 kPa (210 psi).

• The ECM will turn the cooling fans on at low speed when the A/C system is on. The ECM will change to high speed when the coolant temperature reaches 97°C (207°F) or the high side A/C pressure reaches 1859 kPa (270 psi).
• The cooling fans will return to low speed when the coolant temperature reaches 94°C (201°F) and the high side A/C pressure reaches 1449 kPa (210 psi).