2003 HONDA CIVIC cylinder head

19.
20.
lnstall the variable valve timing control (VTC) oil
control solenoid valve (see step 1 on page 11'127).
Connect the crankshaft position (CKP) sensor
connector {A) and VTC oil control solenoid valve
connector (B).
21. Install the crankshaft pulley (see page 6-12).
22. Installthe cylinder head cover (see page 6-41).
23. Installthe drive belt.
24. Installthe splash shield.
€D@
Auto-Tensioner RemovaU
lnstallation
Removal:
1. Remove the chain case cover.
Turn the crankshaft counterclockwise to compress
the auto-tensroner.
{cont'd)
6-19

Gylinder Head
Cylinder Head Cover Removal
1. Remove the intake manifold cover.
2. Remove the four ignition coils (see page 4-'18).
3. Remove the dipstick (A) and breather hose (B).
6-22
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4, Remove the cylinder head cover
V:t :;t 1
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Gylinder Head Removal
NOTE:. Use fender covers to avoid damaging painted
surfaces.
To avoid damage, unplug the wiring connectors
carefully whlle holding the connector portion.
To avoid damaging the cylinder head, wait until the
engine coolant temperature drops below 100'F (38"C)
betore 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.
2.
3.
Drain the engine coolant (see page 10-6).
Remove the drive belt (see page 4-26).
Remove the intake manifold {see page 9-3).
Remove the air cleaner housing (see step 7 on page
5-2t.
5. Remove the water bypass hose (A).
Remove the exhaust manifold (see page 9-7
Remove the cam chain (see page 6-12).
6.
7.
).
8. Remove the engine wire harness connectors and
wire harness clamps from the cylinder head.
. Engine coolant temperature (ECT) sensor
conneclor. Camshaft position (Cl\4P) (top dead center (TDC))
sensor B connector. Camshaft posilion (CMP) sensor A connector
9. Remove the upper radiator hose (A) and heater
hose (B).
'10. Remove the harness holder (A)from the bracket,
then remove the connecting pipe mounting boh {B)
and brake booster vacuum line mounting bolts {C).
(cont'd)
1 1. Remove the water bvpass hose (D).
6-23

Cylinder Head
tJ.
Cylinder Head Removal (cont'd)
Remove the rocker arm assembly (see page 6-26).
Remove the cylinder head bolts. To prevent
warpage, unscrew the bolts in sequence 1/3 turn at
a time; repeat the sequence until all bolts are
loosened.
CYLINDER HEAD BOLTS LOOSENING SEQUENGE:
14. Remove the cylinder head.
6-24
VTC Actuator, Exhaust Camshaft\
Sprocket Replacement
Removal:
1. Remove the cam chain (see page 6-12).
2. Hold the camshaft with an open-end wrench, then
loosen the variable valve timing control (VTC)
actuator mounting bolt and exhaust camshaft
sprocket mounting bolt.
Remove the VTC actuator and exhaust camshaft
sprocket.
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Installation:
1. Install the VTC actuator and exhaust camshaft
sprocket.
2. Apply engine oil to the th reads of the VTC actuato r
mounting bolt and exhaust camshaft mounting bolt,
then install them.
3. Hold the camshaft with an open-end wrench, then
tighten the bolts.
Specified torque:
VTC actuator mounting bolt:
113 N.m (11.5 kgl.m,83 lbl.ft)
Exhaust camshaft sprocket mounting bolt:
72 N m (7.3 kgf.m, 53 lbf.ft)
4. Install the cam chain {see page 6-15).
1,
Cylinder Head Inspection for
Warpage
Remove the cylinder head {see page 6-23).
Inspect the camshaft (see page 6-29).
Check the cylinder head for warpage. Measure
along the edges, and three ways across the center.
. lf warpage is less than 0.05 mm (0.002 in.)
cylinder head resurfacing is not required.. lf 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.).
Cylinder Head Height;
Standard {New}: 103.95 104.05 mm
{4.093 4.096 in.}
6-25

Cylinder Head
'1.
2.
Rocker Arm Assembly Removal
Remove the cam chain (see page 6-12).
Loosen the rocker arm adjusting screws (A),
A
3. Remove the camshaft holder bolts. To Drevent
damaging the camshafts, unscrew the bolts two
turns at a time, in a crisscross pattern.
CAMSHAFT HOLDER BOLTS LOOSENING
SEOUENCE:
6-26
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4.Remove the cam chain guide B, camshaft holders,
and camshafts.
Insert the bolts (A) Into the rocker shaft holder, then
remove the rocker arm assembly (B).5.
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Cylinder Head
1.
2.
Rocker Arms and Shafts Inspection
Remove the rocker arm assembly (see page 6-26).
Measure the diameter of the shaft at the first rocker
location.
3. Zero the gauge (A) to the shaft diameter.
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4. Measure the inside diameter ofthe rocker arm, and
check it for an out-of-round condition.
Rocker Arm-to-Shaflt Clearance:
Standard lNew):
lntake: 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.)
5. Repeat for all rockerarms and both shafts. lfthe
clearance is over the Ilmit. replace the rocker shaft
and all overtolerance rocker arms. lf any VTEC
rocker arm needs replacement, replace the rocker
arms (primary and secondary) as a set.
6. Inspect the rocker arm pistons {A}. Push each
piston manually.
lf it does not move smoothly, replace the rocker
arm set.
NOTE: Apply oil to the pistons when reassembling.
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Gamshaft Inspection
NOTE: Do not rotate the camshaft during inspection.
1. Remove the rocker arm assembly (see page 6-26).
and disassemble it (see page 6-27).
2. Put the rocker shaft holders, camshaft, and
camshaft holders on the cylinder head, then tighten
the bolts to the specified torque.
Specified torque:
I mm bolis:
22 N.m {2.2 kgt m, 16lbf.ft}
6 mm bolts:
12 N.m {1.2 kgf.m,8.7 tbf.ftl
6 mm bolts: @, €0, @
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3. Seat the camshaft by pushing it away from the
camshaft pulley end ofthe cylinder head.
4. Zero the dial indicator against the end of the
camshaft, then push the camshaft back and forth
and read the end play. lf the end play is beyond the
service limit, replace the camshaft head and
recheck. lf it is still beyond the service limit, replace
the cylinder.
Camshaft End Play:
Standard {New}: 0.05 0.20 mm(0.002 0.008 in.l
Service Limit: 0.4 mm (0.02 in.)
(cont'd)
6-29