engine ACURA CSX 2006 Service Repair Manual


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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.
08/08/21 14:37:29 61SNR030_090_0002
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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)
08/08/21 14:37:30 61SNR030_090_0003
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Installation - K20Z2 engine
9-4Intake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont’d)
A
B B
A
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)
7. Raise the vehicle on the lift to full height.
8. Remove the splash shield (see step 25 on page 5-5).
9. Remove the connector (A) from the intake manifoldbracket (B), then remove the intake manifold
bracket.
10. Lower the vehicle on the lift.
11. Remove the intake manifold. 1. Install the intake manifold (A) with a new gasket (B),
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.
08/08/21 14:37:31 61SNR030_090_0004
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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).
08/08/21 14:37:32 61SNR030_090_0005
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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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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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9-11
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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