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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.
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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.
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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).
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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)
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Î
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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.
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Page 190 of 2893
Î
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).
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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.
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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.
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