Intake manifold ACURA CSX 2006 Service User Guide


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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.
08/08/21 14:37:33 61SNR030_090_0006
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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)
08/08/21 14:37:34 61SNR030_090_0007
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9-8Intake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont’d)
A
A
B A
B
A B
7. Disconnect the water bypass hoses (A), then plugthe water bypass hoses.
8. Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see page 11- 329).9. Raise the vehicle on the lift.
10. Remove the splash shield (see step 25 on page 5-5).
11. Remove the connector (A) from the intake manifold bracket (B), then remove the intake manifold
bracket.
12. Lower the vehicle on the lift.
13. Remove the intake manifold (A) from the cylinder head, then disconnect the water bypass hose (B).
08/08/21 14:37:34 61SNR030_090_0008
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Installation - K20Z3 engine
9-9
B A
C
8x1.25mm
22 N·m (2.2 kgf·m, 16 lbf·ft) B
A 8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft) B
A
A
1. Connect the water bypass hose (A) to the intakemanifold (B), then install the intake manifold with a
new gasket (C), and tighten the bolts and the nuts in
a crisscross pattern in three steps, beginning with
the inner bolt.
2. Raise the vehicle on the lift.
3. Install the intake manifold bracket (A), then install the connector (B) to the intake manifold bracket.
4. Install the splash shield (see step 40 on page 5-20).
5. Lower the vehicle on the lift. 6. Connect the fuel feed hose (A) (see page 11-331),
then install the quick-connect fitting cover (B).
7. Connect the water bypass hoses (A).
(cont’d)
08/08/21 14:37:35 61SNR030_090_0009
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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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9-12Intake 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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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.
08/08/21 14:37:39 61SNR030_090_0014
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10-11
Water Passage Replacement
C D
E B A B
A
1. Drain the engine coolant (see page 10-8).
2. Remove the alternator (see page 4-34).
3. Remove the A/C condenser fan shroud assembly.
4. Remove the A/C compressor without disconnecting
the A/C hoses (see step 40 on page 5-7).
5. Remove the intake manifold:
 K20Z2 engine (see page 9-3)
 K20Z3 engine (see page 9-7)
6. Remove the bolt (A) securing the connecting pipe.
7. Disconnect the lower radiator hose (B), the connecting pipe (C), and the water bypass hose (D),
and remove the harness clamp (E). 8. Disconnect the positive crankcase ventilation (PCV)
hose (A), then remove the water passage (B).
9. Remove the thermostat housing.
10. Remove the water pump:  K20Z2 engine (see page 10-6)
 K20Z3 engine (see page 10-7)
(cont’d)
08/08/21 14:40:00 61SNR030_100_0011
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Removal - K20Z2 engine
10-1310-13
EGR Passage Removal and
Installation
A
B
A B
C
20. Install the intake manifold:
 K20Z2 engine (see page 9-4)
 K20Z3 engine (see page 9-9)
21. Install the A/C compressor (see step 28 on page 5-19).
22. Install the A/C condenser fan shroud assembly.
23. Install the alternator (see page 4-36).
24. 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).
25. Clean up any spilled engine coolant. 1. Drain the engine coolant (see page 10-8).
2. Remove the air cleaner assembly (see page 11-345).
3. Remove the harness holder (A) from the bracket,
then remove the harness holder bracket (B).
4. Disconnect the upper radiator hose (A), the heater hose (B), and the water bypass hose (C).
(cont’d)
08/08/21 14:40:01 61SNR030_100_0013
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Removal - K20Z2 engine
10-1310-13
EGR Passage Removal and
Installation
A
B
A B
C
20. Install the intake manifold:
 K20Z2 engine (see page 9-4)
 K20Z3 engine (see page 9-9)
21. Install the A/C compressor (see step 28 on page 5-19).
22. Install the A/C condenser fan shroud assembly.
23. Install the alternator (see page 4-36).
24. 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).
25. Clean up any spilled engine coolant. 1. Drain the engine coolant (see page 10-8).
2. Remove the air cleaner assembly (see page 11-345).
3. Remove the harness holder (A) from the bracket,
then remove the harness holder bracket (B).
4. Disconnect the upper radiator hose (A), the heater hose (B), and the water bypass hose (C).
(cont’d)
08/08/21 14:40:01 61SNR030_100_0013
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