2006 ACURA CSX Radiator

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9-10Intake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont’d)
A
B
C
B
C
A 6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft) B
C A
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
8. Connect the positive crankcase ventilation (PCV) hose (A), the evaporative emission (EVAP) canister
hose (B) and the brake booster vacuum hose (C).
9. Install the harness holder (A) to the bracket, then install the ground cable (B) and the harness clamp
bracket (C).
10. Connect the engine wire harness connectors, and install the wire harness clamps to the intake
manifold:
 Four fuel injector connectors
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector 11. Install the intake air duct (A), then connect the
vacuum hose (B) and breather pipe (C).
12. Install the engine cover.
13. Inspect for fuel leaks. Turn the ignition switch to ON (II) (do not operate the starter) so the fuel pump
runs for about 2 seconds and pressurizes the fuel
line. Repeat this operation three times, then check
for fuel leakage at any point in the fuel line.
14. Clean up any spilled engine coolant.
15. After installation, check that all tubes, hoses and connectors are installed correctly.
16. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8).
08/08/21 14:37:36 61SNR030_090_0010
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9-11
Exhaust Manifold Removal and Installation
A B
A
B
1. Relieve the fuel pressure (see page 11-322).
2. Loosen the drain plug in the radiator, and drain the
engine coolant (see page 10-8).
3. Remove the under-cowl panel (see step 4 on page 20-164).
4. Disconnect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum
hose (B).
5. Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see page 11-329). 6. Disconnect the heater hoses.
7. Remove the rocker arm oil control valve (see page
11-296).
8. Remove the intermediate shaft heat shield (see step 3 on page 16-23).
(cont’d)
08/08/21 14:37:37 61SNR030_090_0011
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9-12Intake Manifold and Exhaust System
Exhaust Manifold Removal and Installation (cont’d)
EXHAUST MANIFOLD
COVER
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
10 x 1.25 mm
44 N·m
(4.5 kgf·m, 33 lbf·ft)
8x1.25mm
22 N·m (2.2 kgf·m, 16 lbf·ft) GASKET
GASKET
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
10x1.25mm
44 N·m
(4.5 kgf·m, 33 lbf·ft)
SELF-LOCKING NUT
10 x 1.25 mm
44 N·m (4.5 kgf·m, 33 lbf·ft)
EXHAUST MANIFOLD BRACKETHEAT SHIELD
9. Remove the cover and the exhaust manifold bracket, then remove the exhaust manifold.
10. Install the exhaust manifold, and tighten the bolts and nuts in a crisscross pattern in three steps, beginning with the inner bolt.
11. Install the other parts in the reverse order of removal.
12. Inspect for leaks. Turn the ignition switch to ON (II) (do not operate the starter) so the fuel pump runs for about 2 seconds and pressurizes the fuel line. Repeat this operation three times, then check for fuel leakage at any point
in the fuel line.
13. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater valve open (see step 6 on page 10-8).
Tighten the bolts in steps,
alternating side-to-side.Replace.
Replace.
Replace.
08/08/21 14:37:38 61SNR030_090_0012
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Engine Cooling
Cooling System
Fan Controls
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Component Location Index
. 10-2
Radiator Cap Test . 10-4
Radiator Test . 10-4
Fan Motor Test . 10-5
Thermostat Test . 10-5
Water Pump Inspection . 10-6
Water Pump Replacement . 10-6
Coolant Check . 10-7
Coolant Replacement . 10-8
Thermostat Replacement . 10-10
Water Passage Replacement . 10-11
EGR Passage Removal and Installation . 10-13
Water Outlet Removal and Installation . 10-16
Radiator and Fan Replacement . 10-19
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Component Location Index
. 10-23
Symptom Troubleshooting Index . 10-24
Circuit Diagram . 10-25
Radiator Fan High Speed Circuit Troubleshooting . 10-26
08/08/21 14:39:50 61SNR030_100_0001
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10-2Cooling System
Component Location Index
THERMOSTAT
RADIATOR
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
WATER PUMP
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY
WATER PASSAGE COOLANT SEPARATOR
EXHAUST GAS RECIRCULATION
(EGR) PASSAGE
Test, page 10-5
Replacement, page 10-10
Replacement,
page 10-19Inspection, page 10-6
Replacement, page 10-6
Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-19
Fan Motor Test, page 10-5
Replacement,
page 10-11 Replacement, page 10-13
08/08/21 14:39:53 61SNR030_100_0002
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K20Z3 engine
10-3
THERMOSTAT
RADIATOR
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
WATER PUMP
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY WATER OUTLET
COOLANT SEPARATOR
OIL COOLER
WATER PASSAGE
Test, page 10-5
Replacement, page 10-10
Replacement, page 10-19
Inspection, page 10-6
Replacement, page 10-6
Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-16
Replacement, page 10-11
08/08/21 14:39:56 61SNR030_100_0003
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10-410-4 Cooling System
Radiator Cap Test
Radiator Test
A
B
A
1. Wait until the engine is cool, then carefully removethe radiator cap (A). Wet the radiator cap seal with
engine coolant, then install it on a commercially
available pressure tester (B).
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 base of the filler neck.
2. Attach a commercially available pressure tester (A) to the radiator, and apply a pressure of 93 123 kPa
(0.95 1.25 kgf/cm , 14 18 psi).
3. Inspect for engine coolant leaks and a drop in pressure.
4. Check for engine oil in the coolant and/or coolant in the engine oil.
5. Remove the tester, and reinstall the radiator cap.
2 2
08/08/21 14:39:57 61SNR030_100_0004
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Standard Thermostat
Lift Height: Above 8.0 mm (0.31 in.)
Starts Opening: 76 80 °C (169 176 °F)
Fully Open: 90 °C (194 °F)
10-510-5
Fan Motor Test
Thermostat Test
B
A
1. Disconnect the 2P connectors from the radiator fan motor and the A/C condenser fan motor.
2. Test the motor by connecting battery power to terminal No. 2 and ground to terminal No. 1.
3. If the motor fails to run or does not run smoothly, replace it (see page 10-19). Replace the thermostat if it is stuck in the open position
at room temperature.
To test a closed thermostat:
1. Suspend the thermostat (A) in a container of water. Do not let the thermostat and the thermometer (B)
touch the bottom of the hot container.
2. Heat the water, and check the temperature with a thermometer. Check the temperature when the
thermostat first opens, then check the temperature
again when the thermostat is fully open.
3. Measure the lift height of the thermostat when it is fully open. If it thermostat is not within the
specification, replace it.
Terminal side of
male terminals
08/08/21 14:39:57 61SNR030_100_0005
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