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Acura RSX Honda Integra. Manual - part 69

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10-2

Cooling System

Component Location Index

WATER PUMP

CONNECTING PIPE

WATER PASSAGE

RADIATOR

A/C CONDENSER
FAN ASSEMBLY

RADIATOR FAN SWITCH

RADIATOR
CAP

THERMOSTAT

RADIATOR FAN
ASSEMBLY

RESERVE
TANK

WATER OUTLET

Inspection, page 10-5
Replacement, page 10-5

Replacement, page 10-9

Replacement, page 10-12

Replacement, page 10-12
Fan Motor Test, page 10-4

Test, page 10-19
Replacement, page 10-19

Test, page 10-3

Test, page 10-4
Replacement, page 10-8

Replacement, page 10-12
Fan Motor Test, page 10-4

Replacement, page 10-11

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10-3

Radiator Cap Test

Radiator Test

1. Remove the radiator cap (A), wet its seal with

engine coolant, then install it on the pressure tester
(B) (commercially available).

2. Apply a pressure of 93

123 kPa (0.95

1.25

kgf/cm , 14

18 psi).

3. Check for a drop in pressure.

4. If the pressure drops, replace the cap.

1. Wait until the engine is cool, then carefully remove

the radiator cap and fill the radiator with engine
coolant to the top of the filler neck.

2. Attach the pressure tester (A) (commercially

available) to the radiator.

3. Apply a pressure of 93

123 kPa (0.95

1.25

kgf/cm , 14

18 psi).

4. Inspect for engine coolant leaks and a drop in

pressure.

5. Remove the tester, and reinstall the radiator cap.

6. Check for engine oil in the coolant and/or coolant in

the engine oil.

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Standard Thermostat
Lift Height:

Above 8.0 mm (0.31 in.)

Starts Opening: 169

176 °F (76

80 °C)

Fully Open:

194 °F (90 °C)

10-4

Cooling System

Fan Motor Test

Thermostat Test

1. Disconnect the 2P connectors from the radiator fan

motor and condenser fan motor.

2. Test the motor by connecting battery power to the

B terminal and ground to the A terminal.

3. If the motor fails to run or does not run smoothly,

replace it (see page 10-12).

Replace the thermostat if it is open at room
temperature.

To test a closed thermostat:

1. Suspend the thermostat (A) in a container of water.

Do not let the thermometer (B) touch the bottom of
the hot container.

2. Heat the water, and check the temperature with a

thermometer. Check the temperature at which the
thermostat first opens, and at which it is fully open.

3. Measure the lift height of the thermostat when it is

fully open.

Terminal side of
male terminals.

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10-5

Water Pump Inspection

Water Pump Replacement

6 x 1.0 mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)

1. Remove the drive belt (see page 4-43).

2. Turn the water pump pulley counterclockwise.

Check that it turns freely. If it doesn’t turn smoothly,
replace the water pump.

NOTE: When you check the water pump pulley, you
may see a small amout of ‘‘weeping’’ from the
bleed holes (A). This is normal.

3. Install the drive belt (see page 4-43).

1. Remove the drive belt (see page 4-43).

2. Drain the engine coolant (see page 10-6).

3. Remove the drive belt auto-tensioner (see page

4-45).

4. K20A3 engine: Remove the six bolts securing the

water pump, then remove the water pump (A).

5. K20A2, K20Z1 engines: Remove the oil cooler joint

pipe (A), then remove the seven bolts securing the
water pump. Remove the water pump (B).

6. Inspect and clean the O-ring groove and mating

surface with the water passage.

7. Install the water pump with new O-rings in the

reverse order of removal.

8. Install the drive belt auto-tensioner (see page 4-45).

9. Refill the radiator with engine coolant, and bleed

air from the cooling system with the heater valve
open (see step 7 on page 10-7).

10. Clean up any spilled engine coolant.

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Content .. 67 68 69 70 ..