sensor ACURA CSX 2006 Service Owner's Manual



6-64Cylinder Head
Cylinder Head Installation (cont’d)
B
A
8 x 1.25 mm
22 N·m (2.2 kgf·m, 16 lbf·ft) A
B
A
B
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
12. Install the rocker arm assembly:
 K20Z2 engine (see page 6-60)
 K20Z3 engine (see page 6-61)
13. Install the cam chain (see page 6-21).
14. Connect the following engine wire harness connectors, and install the wire harness clamps to
the cylinder head:
 Four fuel injector connectors
 Engine coolant temperature (ECT) sensor 1 connector
 Camshaft position (CMP) sensor A (Intake) connector
 Camshaft position (CMP) sensor B (Exhaust) connector
 Rocker arm oil control valve connector
 Rocker arm oil pressure switch connector
 EVAP canister purge valve connector
 Variable valve timing control (VTC) oil control solenoid valve connector
 Exhaust gas recirculation (EGR) valve connector (K20Z2 engine)
 Engine oil pressure switch connector
15. Install the bolt (A) securing the connecting pipe.
16. Connect the water bypass hose (B). 17. Connect the upper radiator hose (A) and the heater
hoses (B).
18. Install the harness holder bracket (A), then install the harness holder (B).
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Exploded View - K20Z2 engine
9-2Intake Manifold and Exhaust System
Intake Manifold Removal and Installation
INTAKE AIR BYPASS (IAB)
THERMAL VALVE
JOINT GASKET
THROTTLE BODY
INTAKE MANIFOLD BRACKET
MANIFOLD
ABSOLUTE
PRESSURE
(MAP)
SENSOR INJECTOR BASE
EXHAUST GAS
PRECIRCULATION
(EGR) PLATE 6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) 8 x 1.25 mm
22 N·m
(2.2 kgf·m,
16 lbf·ft)
GASKET
INTAKE MANIFOLD
O-RING
5x0.8mm
3.4 N·m
(0.35 kgf·m, 2.5 lbf·ft)
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
GASKET
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
GASKET
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) 6x1.0mm
12 N·m
(1.2 kgf·m,
8.7 lbf·ft)
INTAKE MANIFOLD
CHAMBER
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
GASKET
MARK
Tigten the valve to 15 N·m
(1.5 kgf·m, 11 lbf·ft), then turn the
valve joint toward the mark.
Replace.
Replace if cracked or
if mating surface is
damaged.
Replace.
Replace if cracked or
if mating surface is
damaged.
Replace.
Replace.
Replace.
Replace.
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Removal - K20Z2 engine
9-3
A
B C A
B
C D
A
1. Remove the engine cover.
2. Disconnect the vacuum hose (A) and the breatherpipe (B), then remove the intake air duct (C). 3. Disconnect the engine wire harness connectors,
and remove the wire harness clamps from the
intake manifold:
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector
4. Disconnect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum
hose (B).
5. Remove the harness bracket mounting bolt (C) and the brake booster vacuum line bracket mounting
bolt (D).
6. Disconnect the water bypass hoses (A), then plug the water bypass hoses.
(cont’d)
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9-5
A
A
B
C
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft) D
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)
6. Connect the water bypass hoses (A).
7. Connect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum hose (B).
8. Install the harness bracket mounting bolt (C) and the brake booster vacuum line bracket mounting
bolt (D).
9. Connect the engine wire harness connectors, and install the wire harness clamps to the intake
manifold.
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector 10. Install the intake air duct (A), then connect the
vacuum hose (B) and the breather pipe (C).
11. Install the engine cover.
12. After installation, check that all tubes, hoses and connectors are installed correctly.
13. Clean up any spilled engine coolant.
14. 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).
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Exploded View - K20Z3 engine
9-6Intake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont’d)
JOINT
GASKET
5x0.8mm
3.4 N·m
(0.35 kgf·m, 2.5 lbf·ft)
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) GASKET
O-RING
MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR
INTAKE MANIFOLD BRACKET
INTAKE MANIFOLD
THROTTLE BODY
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) 8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
MARK
INTAKE AIR BYPASS (IAB)
THERMAL VALVE
Replace.
Replace.
Replace.
Replace if cracked or if
mating surface is damaged. Tighen the valve to 15 N·m
(1.5 kgf·m, 11 lbf·ft), then turn the
valve joint toward the mark.
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Removal - K20Z3 engine
9-7
A
B C A
B
C
A B
C
1. Remove the engine cover.
2. Relieve the fuel pressure (see page 11-322).
3. Disconnect the vacuum hose (A) and the breather
pipe (B), then remove the intake air duct (C). 4. Disconnect the following engine wire harness
connectors, and remove the wire harness clamps
from the intake manifold:
 Four fuel injector connectors
 Manifold absolute pressure (MAP) sensor connector
 Throttle actuator connector
5. Remove the ground cable (A) and the harness clamp bracket (B), then remove the harness holder
(C) from the bracket.
6. Disconnect the positive crankcase ventilation (PCV) hose (A), the evaporative emission (EVAP) canister
hose (B) and the brake booster vacuum hose (C).
(cont’d)
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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).
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K20Z2 engine
9-13
Exhaust Pipe and Muffler Replacement
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft) 8x1.25mm
22 N·m (2.2 kgf·m, 16 lbf·ft)
HEAT SHIELD
GASKET MUFFLER
EXHAUST PIPE B
SELF-LOCKING NUTS
10x1.25mm
33N·m(3.4kgf·m,25lbf·ft) GASKET
GASKET THREE WAY CATALYTIC CONVERTER
(TWC) ASSEMBLY
SECONDARY HEATED
OXYGEN SENSOR
(SECONDARY HO2S)
44N·m(4.5kgf·m,33lbf·ft)
AIR FUEL RATIO (A/F) SENSOR
44 N·m (4.5 kgf·m, 33 lbf·ft) 8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)
NOTE: Use new gaskets and self-locking nuts when reassembling.
Tighten the bolts in steps,
alternating side-to-side.
Replace.
Replace. Replace.
Replace. Tighten the bolts in steps,
alternating side-to-side.
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K20Z3 engine
9-14Intake Manifold and Exhaust System
Exhaust Pipe and Muffler Replacement (cont’d)
8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)
8x1.25mm
22 N·m (2.2 kgf·m, 16 lbf·ft)
HEAT SHIELD
GASKET MUFFLER
EXHAUST PIPE B
SELF-LOCKING NUTS
10x1.25mm
33 N·m
(3.4 kgf·m, 25 lbf·ft)
GASKET
THREE WAY CATALYTIC CONVERTER
(TWC) ASSEMBLY
SECONDARY HEATED
OXYGEN SENSOR
(SECONDARY HO2S)
44 N·m (4.5 kgf·m, 33 lbf·ft)
AIR FUEL RATIO (A/F) SENSOR
44 N·m (4.5 kgf·m, 33 lbf·ft) GASKET
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)
NOTE: Use new gaskets and self-locking nuts when reassembling.
Tighten the bolts in steps,
alternating side-to-side.
Tighten the bolts in steps,
alternating side-to-side.
Replace.
Replace.
Replace.
Replace.
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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
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