Acura CSX. Instruction — page 53

*01

04

*01

02

SNR9A00A14600000000KCAT00

Specified Torque
8 x 1.25 mm
22 N·m (2.2 kgf·m, 16 lbf·ft)
6 x 1.0 mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
6 x 1.0 mm Bolts:

,

,

6-62

6-62

Cylinder Head

Cylinder Head Installation

C

A

B

A

B

A

B

6. Make sure the punch marks on the variable valve

timing control (VTC) actuator and the exhaust
camshaft sprocket are facing up, then set the
camshafts (A) in the holder. Apply new engine oil to
the camshaft journals and lobes.

7. Set the camshaft holders (C) and cam chain guide B

in place.

8. Tighten the bolts in sequence to the specified

torque.

NOTE: If the engine does not have bolt

, skip it

and continue the torque sequence.

9. Install the cam chain (see page 6-21), then adjust

the valve clearance (see page 6-14).

1. Install a new coolant separator (A) in the engine

block whenever the engine block is replaced.

2. Clean the cylinder head and the engine block

surface.

3. Install the new cylinder head gasket (A) and the

dowel pins (B) on the engine block. Always use a
new cylinder head gasket.

*01

04

*01

02

SNR9A00A14600000000KCAT00

Specified Torque
8 x 1.25 mm
22 N·m (2.2 kgf·m, 16 lbf·ft)
6 x 1.0 mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
6 x 1.0 mm Bolts:

,

,

6-62

6-62

Cylinder Head

Cylinder Head Installation

C

A

B

A

B

A

B

6. Make sure the punch marks on the variable valve

timing control (VTC) actuator and the exhaust
camshaft sprocket are facing up, then set the
camshafts (A) in the holder. Apply new engine oil to
the camshaft journals and lobes.

7. Set the camshaft holders (C) and cam chain guide B

in place.

8. Tighten the bolts in sequence to the specified

torque.

NOTE: If the engine does not have bolt

, skip it

and continue the torque sequence.

9. Install the cam chain (see page 6-21), then adjust

the valve clearance (see page 6-14).

1. Install a new coolant separator (A) in the engine

block whenever the engine block is replaced.

2. Clean the cylinder head and the engine block

surface.

3. Install the new cylinder head gasket (A) and the

dowel pins (B) on the engine block. Always use a
new cylinder head gasket.

03

01

05

06

6-63

A

B

B

50 mm (2.0 in.)

45 mm (1.8 in.)

A

FIRST STEP

SECOND STEP

THIRD STEP
(New bolt)

4. Set the crankshaft to top dead center (TDC). Align

the TDC mark (A) on the crankshaft sprocket with
the pointer (B) on the engine block.

5. Set the camshaft pulley to TDC (see step 2 on page

6-21).

6. Install the cylinder head on the engine block.

7. Measure the diameter of each cylinder head bolt at

point A and point B.

8. If either diameter is less than 10.6 mm (0.42 in.),

replace the cylinder head bolt.

9. Apply new engine oil to the threads and under the

bolt heads of all cylinder head bolts.

10. Tighten the cylinder head bolts in sequence to

39 N·m (4.0 kgf·m, 29 lbf·ft). Use a beam-type
torque wrench. When using a preset click-type
torque wrench, be sure to tighten slowly and do not
overtighten. If a bolt makes any noise while you are
torquing it, loosen the bolt and retighten it from the
first step.

11. After torquing, tighten all cylinder head bolts in two

steps (90 ° per step) using the sequence shown in
step 10. If you are using a new cylinder head bolt,
tighten the bolt an extra 90 °.

NOTE: Remove the cylinder head bolt if you
tightened it beyond the specified angle, and go
back to step 6 of the procedure. Do not loosen it
back to the specified angle.

07

08

09

6-64

Cylinder Head

B

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

A

B

A

B

6 x 1.0 mm
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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