2006 ACURA CSX engine oil

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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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6-40Cylinder 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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K20Z2 engine
6-46Cylinder Head
Rocker Arm and Shaft Disassembly/Reassembly
EXHAUST ROCKER
SHAFT
EXHAUST ROCKER ARM
No. 1
ROCKER SHAFT
HOLDER RUBBER BAND
No. 2
ROCKER SHAFT
HOLDER No. 3
ROCKER SHAFT
HOLDER No. 4
ROCKER SHAFT
HOLDER
INTAKE ROCKER
ARM ASSEMBLYNo. 5
ROCKER SHAFT
HOLDER
INTAKE ROCKER SHAFT
NOTE:  Identify each part as it is removed so that each item can be reinstalled in its original position.
 Inspect the rocker shafts and the rocker arms (see page 6-48).
 If reused, the rocker arms must be installed in the same positions.
 When removing, or installing the rocker arm assembly, do not remove the camshaft holder bolts. The bolts will keep the holders and rocker arms on the shaft.
 Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to any contact points.
 Bundle the intake rocker arms with rubber bands to keep them together as a set.
 When replacing the intake rocker arm assembly, remove the fastening hardware from the new intake rocker arm assembly.
08/08/21 14:28:15 61SNR030_060_0046
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K20Z3 engine
6-47
EXHAUST ROCKER
SHAFT
EXHAUST ROCKER
ARM ASSEMBLY
No. 1
ROCKER SHAFT
HOLDER RUBBER BAND No. 2
ROCKER SHAFT
HOLDERNo. 3
ROCKER SHAFT
HOLDER No. 4
ROCKER SHAFT
HOLDER
INTAKE ROCKER
ARM ASSEMBLYNo. 5
ROCKER SHAFT
HOLDER
INTAKE ROCKER SHAFT
RUBBER BAND
NOTE:
 Identify each part as it is removed so that each item can be reinstalled in its original position.
 Inspect the rocker shafts and the rocker arms (see page 6-49).
 If reused, the rocker arms must be installed in the same positions.
 When removing, or installing the rocker arm assembly, do not remove the camshaft holder bolts. The bolts will keep the holders and rocker arms on the shaft.
 Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to any contact points.
 Bundle the rocker arms with rubber bands to keep them together as a set.
 When replacing the VTEC rocker arm assembly, remove the fastening hardware from the new VTEC rocker arm assembly.
08/08/21 14:28:16 61SNR030_060_0047
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K20Z2 engine
Rocker Arm-to-Shaft Clearance
Standard (New):
Intake: 0.025 0.052 mm (0.0010 0.0020 in.)
Exhaust: 0.018 0.056 mm (0.0007 0.0022 in.)
Service Limit: 0.08 mm (0.003 in.)
6-48 Cylinder Head
Rocker Arm and Shaft Inspection
A
A
1. Remove the rocker arm assembly (see page 6-43).
2. Disassemble the rocker arm assembly (see page6-46).
3. Measure the diameter of the shaft at the first rocker location.
4. Zero the gauge (A) to the shaft diameter. 5. Measure the inside diameter of the rocker arm, and
check it for an out-of-round condition.
6. Repeat for all rocker arms and both shafts. If the clearance is beyond the service limit, replace the
rocker shaft and all out of service limit rocker arms.
If any VTEC rocker arm needs replacement, replace
the rocker arms (primary and secondary), as a set.
7. Inspect the rocker arm pistons (A). Push on each piston manually. If it does not move smoothly,
replace the rocker arm as a set.
NOTE: Apply new engine oil to the rocker arm
pistons when reassembling.
8. Install the rocker arm assembly (see page 6-60).
08/08/21 14:28:16 61SNR030_060_0048
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K20Z3 engine
Rocker Arm-to-Shaft Clearance
Standard (New): 0.025 0.052 mm (0.0010 0.0020 in.)
Service Limit: 0.08 mm (0.003 in.)
6-49
A
A
1. Remove the rocker arm assembly (see page 6-44).
2. Disassemble the rocker arm assembly (see page6-47).
3. Measure the diameter of the shaft at the first rocker location.
4. Zero the gauge (A) to the shaft diameter. 5. Measure the inside diameter of the rocker arm, and
check it for an out-of-round condition.
6. Repeat for all rocker arms and both shafts. If the clearance is beyond the service limit, replace the
rocker shaft and all out of service limit rocker arms.
If any VTEC rocker arm needs replacement, replace
the rocker arms (primary, mid, and secondary), as a
set.
7. Inspect the rocker arm pistons (A). Push on each piston manually. If it does not move smoothly,
replace the rocker arms as a set.
NOTE: Apply new engine oil to the rocker arm
pistons when reassembling.
8. Install the rocker arm assembly (see page 6-61).
08/08/21 14:28:17 61SNR030_060_0049
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