Acura TSX / Honda Accord CL. Manual — part 393

Fig. 5: Suspending The Thermostat In A Container Of Water

2004 Acura TSX

2004 ENGINES Cooling System - TSX

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.

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)

WATER PUMP INSPECTION

1. Remove the drive belt (see DRIVE BELT ).

2. Turn the water pump pulley counterclockwise. Check that it turns freely.

3. Check for signs of seal leakage. A small amount of "weeping" from the bleed holes (A) is normal.

2004 Acura TSX

2004 ENGINES Cooling System - TSX

Fig. 6: Checking For Signs Of Seal Leakage

WATER PUMP REPLACEMENT

1. Remove the drive belt (see DRIVE BELT ).

2. Drain the engine coolant (see COOLANT REPLACEMENT ).

3. Remove the crankshaft pulley (see CRANKSHAFT PULLEY REMOVAL AND INSTALLATION ).

4. Remove the six bolts securing the water pump, then remove the water pump (A).

2004 Acura TSX

2004 ENGINES Cooling System - TSX

Fig. 7: Removing The Six Bolts Securing The Water Pump, Then The Water Pump

5. Inspect and clean the O-ring groove and mating surface with the water passage.

6. Install the water pump with new O-rings in the reverse order of removal.

7. Clean up any spilled engine coolant.

8. Install the crankshaft pulley (see CRANKSHAFT PULLEY REMOVAL AND INSTALLATION ).

9. Refill the radiator with engine coolant, and bleed air from the cooling system with the heater valve open

(see COOLANT REPLACEMENT ).

COOLANT CHECK

1. Look at the coolant level in the reserve tank. Make sure it is between the MAX mark (A) and MIN mark

(B).

2004 Acura TSX

2004 ENGINES Cooling System - TSX