ACURA CSX 2006 Service Repair Manual




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6-37
Cylinder Head Cover Installation
A
B C
B
A
1. Thoroughly clean the head cover gasket and the groove.
2. Install the head cover gasket (A) in the groove of the cylinder head cover (B).
3. Check that the mating surfaces are clean and dry.
4. Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, or 08718-0009, evenly to the chain
case and the No. 5 rocker shaft holder mating areas.
Install the component within 5 minutes of applying
the liquid gasket.
NOTE: If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes.
 If too much time has passed after applying the liquid gasket, remove the old liquid gasket and
residue, then reapply new liquid gasket. 5. Set the spark plug seals (A) on the spark plug tubes.
Place the cylinder head cover (B) on the cylinder
head, then slide the cover slightly back and forth to
seat the head cover gasket.
6. Inspect the cover washers (C). Replace any washer that is damaged or deteriorated.
7. Tighten the bolts in three steps. In the final step tighten all bolts, in sequence, to 12 N·m (1.2 kgf·m,
8.7 lbf·ft).
NOTE: Wait at least 30 minutes before filling the engine with oil.
 Do not run the engine for at least 3 hours after installing the head cover.
(cont’d)
Apply liquid gasket
to these points.
Apply liquid gasket
to these points.
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6-386-38 Cylinder Head
Cylinder Head Cover Installation
(cont’d)
Cylinder Head Removal
B
C
A
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) A
B
8. Install two bolts (A) securing the evaporativeemission (EVAP) canister purge valve bracket.
9. Connect the breather hose (B), and install the dipstick (C).
10. Connect the evaporative emission (EVAP) canister purge valve connector.
11. Install the four ignition coils (see page 4-21).
12. Install the engine cover. NOTE:
 Use fender covers to avoid damaging the painted surfaces.
 To avoid damaging the wire and terminals, unplug the wiring connectors carefully while holding the
connector portion.
 Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3),
and monitor the engine coolant temperature (ECT)
sensor 1. To avoid damaging the cylinder head, wait
until the engine coolant temperature drops below
38 °C (100 °F) before loosening the cylinder head
bolts.
 Mark all wiring and hoses to avoid misconnection. Also, be sure that they do not contact other wiring or
hoses, or interfere with other parts.
1. Relieve the fuel pressure (see page 11-322).
2. Drain the engine coolant (see page 10-8).
3. Remove the air cleaner assembly (see page 11-345).
4. Remove the drive belt (see page 4-31).
5. Remove the intake manifold:  K20Z2 engine (see page 9-3)
 K20Z3 engine (see page 9-7)
6. Remove the exhaust manifold (see page 9-11).
7. Disconnect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum
hose (B).
08/08/21 14:27:27 61SNR030_060_0038
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6-386-38 Cylinder Head
Cylinder Head Cover Installation
(cont’d)
Cylinder Head Removal
B
C
A
6x1.0mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) A
B
8. Install two bolts (A) securing the evaporativeemission (EVAP) canister purge valve bracket.
9. Connect the breather hose (B), and install the dipstick (C).
10. Connect the evaporative emission (EVAP) canister purge valve connector.
11. Install the four ignition coils (see page 4-21).
12. Install the engine cover. NOTE:
 Use fender covers to avoid damaging the painted surfaces.
 To avoid damaging the wire and terminals, unplug the wiring connectors carefully while holding the
connector portion.
 Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3),
and monitor the engine coolant temperature (ECT)
sensor 1. To avoid damaging the cylinder head, wait
until the engine coolant temperature drops below
38 °C (100 °F) before loosening the cylinder head
bolts.
 Mark all wiring and hoses to avoid misconnection. Also, be sure that they do not contact other wiring or
hoses, or interfere with other parts.
1. Relieve the fuel pressure (see page 11-322).
2. Drain the engine coolant (see page 10-8).
3. Remove the air cleaner assembly (see page 11-345).
4. Remove the drive belt (see page 4-31).
5. Remove the intake manifold:  K20Z2 engine (see page 9-3)
 K20Z3 engine (see page 9-7)
6. Remove the exhaust manifold (see page 9-11).
7. Disconnect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum
hose (B).
08/08/21 14:27:27 61SNR030_060_0038
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6-39
A
B
A B B
A
A B
8. Remove the quick-connect fitting cover (A), then
disconnect the fuel feed hose (B) (see page 11- 329).
9. Disconnect the positive crankcase ventilation (PCV) hose (A) (K20Z2 engine) and remove the ground
cable (B). 10. Remove the harness holder (A) from the bracket,
then remove the harness holder bracket (B).
11. Disconnect the upper radiator hose (A) and the heater hoses (B).
(cont’d)
08/08/21 14:27:27 61SNR030_060_0039
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6-40Cylinder Head
Cylinder Head Removal (cont’d)
B
A
12. Remove the bolt (A) securing the connecting pipe.
13. Disconnect the water bypass hose (B).
14. Disconnect the following engine wire harnessconnectors, and remove the wire harness clamps
from 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. Remove the cam chain (see page 6-18).
16. Remove the rocker arm assembly:
 K20Z2 engine (see page 6-43)
 K20Z3 engine (see page 6-44)
17. Remove the cylinder head bolts. To prevent warpage, loosen the bolts in sequence 1/3 turn at a
time. Repeat the sequence until all bolts are
loosened.
18. Remove the cylinder head.
08/08/21 14:27:28 61SNR030_060_0040
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6-416-41
CMP Pulse Plate A Replacement CMP Pulse Plate B Replacement
14x1.0mm
39 N·m
(4.0 kgf·m, 29 lbf·ft) 14x1.0mm
39 N·m
(4.0 kgf·m, 29 lbf·ft)
1. Remove the cylinder head cover (see page 6-36).
2. Remove camshaft position (CMP) sensor A
(see page 11-295).
3. Hold the intake camshaft with an open-end wrench, then loosen the bolt.
4. Remove CMP pulse plate A.
5. Install CMP pulse plate A in the reverse order of removal. 1. Remove the cylinder head cover (see page 6-36).
2. Remove camshaft position (CMP) sensor B
(see page 11-222).
3. Hold the exhaust camshaft with an open-end wrench, then loosen the bolt.
4. Remove CMP pulse plate B.
5. Install CMP pulse plate B in the reverse order of removal.
Apply new engine oil to the
bolt threads. Apply new engine oil to the
bolt threads.
08/08/21 14:28:11 61SNR030_060_0041
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Removal Installation
Specified Torque
VTC Actuator Mounting Bolt:
12x1.25mm
113 N·m (11.5 kgf·m, 83 lbf·ft)
Exhaust Camshaft Sprocket Mounting Bolt:
10x1.25mm
72 N·m (7.3 kgf·m, 53 lbf·ft)
6-42Cylinder Head
VTC Actuator, Exhaust Camshaft Sprocket Replacement
1. Remove the cam chain (see page 6-18).
2. Hold the exhaust camshaft with an open-end
wrench, then loosen the variable valve timing
control (VTC) actuator mounting bolt and the
exhaust camshaft sprocket mounting bolt.
3. If the VTC actuator is reused, do these steps. –1 Remove the intake camshaft, and seal theadvance holes and retard holes in the No. 1
camshaft journal with tape (see step 6 on page
6-11).
–2 Punch a hole in the tape over one of the advance holes (see step 7 on page 6-11).
–3 Apply air to the advance hole to release the lock (see step 8 on page 6-11).
–4 Remove the tape from the No. 1 camshaft journal.
4. Remove the VTC actuator and the exhaust camshaft sprocket. 1. Install the variable valve timing control (VTC)
actuator and exhaust camshaft sprocket.
NOTE: Install the VTC actuator to unlock position.
2. Apply new engine oil to the threads of the VTC actuator mounting bolt and the exhaust camshaft
mounting bolt, then install them.
3. Hold the exhaust camshaft with an open-end wrench, then tighten the mounting bolts.
4. Hold the exhaust camshaft with an open-end wrench, and turn the VTC actuator clockwise until
you hear it click. Make sure to lock the VTC actuator
by turning it.
5. Install the cam chain (see page 6-21).
08/08/21 14:28:11 61SNR030_060_0042
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µ
µ
Cylinder Head Height
Standard (New): 103.95 104.05 mm
(4.093 4.096 in.)
K20Z2 engine
6-436-43
Cylinder Head Inspection for
Warpage Rocker Arm Assembly Removal
PRECISION STRAIGHT EDGE A
A
1. Remove the cylinder head (see page 6-38).
2. Inspect the camshaft:  K20Z2 engine (see page 6-50)
 K20Z3 engine (see page 6-52)
3. Check the cylinder head for warpage. Measure along the edges, and three ways across the center.
 If warpage is less than 0.05 mm (0.002 in.) cylinder head resurfacing is not required.
 If warpage is between 0.05 mm (0.002 in.) and 0.2 mm (0.008 in.), resurface the cylinder head.
 Maximum resurface limit is 0.2 mm (0.008 in.) based on a height of 104 mm (4.09 in.). 1. Remove the cam chain (see page 6-18).
2. Loosen the rocker arm adjusting screws (A).
3. Remove the camshaft holder bolts. To prevent
damaging the camshafts, loosen the bolts, in
sequence, two turns at a time in a crisscross
pattern.
(cont’d)
08/08/21 14:28:12 61SNR030_060_0043
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K20Z3 engine
6-446-44 Cylinder Head
Rocker Arm Assembly Removal (cont’d)
A
C B
A B
A A
A
4. Remove cam chain guide B, the camshaft holders (A), and the camshafts (C).
5. Insert the bolts (A) into the rocker shaft holder, then remove the rocker arm assembly (B). 1. Remove the cam chain (see page 6-18).
2. Loosen the rocker arm adjusting screws (A).
3. Remove the camshaft holder bolts. To prevent
damaging the camshafts, loosen the bolts, in
sequence, two turns at a time in a crisscross
pattern.
NOTE: Bolt is not on all engines.
08/08/21 14:28:14 61SNR030_060_0044
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6-45
C
A
B
A A
B
4. Remove cam chain guide B, the camshaft holders(A), and the camshafts (C).
5. Insert the bolts (A) into the rocker shaft holder, then remove the rocker arm assembly (B).
08/08/21 14:28:15 61SNR030_060_0045
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