Acura CSX. Instruction — page 71

01

SNR9AEBA20336335001KDAT01

Exploded View — K20Z3 engine

9-6

Intake Manifold and Exhaust System

JOINT

GASKET

5 x 0.8 mm
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

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)

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.

02

03

04

05

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).

*01

01

08

09

9-8

Intake Manifold and Exhaust System

A

A

B

A

B

A

B

7. Disconnect the water bypass hoses (A), then plug

the 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).

10

11

02

*02

Installation — K20Z3 engine

9-9

B

A

C

8 x 1.25 mm
22 N·m (2.2 kgf·m, 16 lbf·ft)

B

A

8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)

B

A

A

1. Connect the water bypass hose (A) to the intake

manifold (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).

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