Acura CSX. Instruction — page 70

01

SNR9AEAA20336335001KDAT00

Exploded View — K20Z2 engine

9-2

Intake 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

6 x 1.0 mm
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

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

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

GASKET

6 x 1.0 mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)

6 x 1.0 mm
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.

02

03

04

*01

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 breather

pipe (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.

06

07

08

01

Installation — K20Z2 engine

9-4

Intake Manifold and Exhaust System

A

B

B

A

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)

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 manifold

bracket (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.

*02

11

12

13

9-5

A

A

B

C
6 x 1.0 mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)

D
6 x 1.0 mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)

B

C

A

6 x 1.0 mm
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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