2003 HONDA CIVIC cylinder head

Cylinder Head Installation
Install the cylinder head in the reverse order of
removat:
1. Clean the cylinder head and block surface.
2. Install the new cylinder head gasket (A) anddowel
pins (B) on the cylinder block. Always use a new
cylinder head gasket.
Set the crankshaft to top dead center {TDC). Align
the TDC mark (A) on the crankshaft sprocket with
the pointer (B) on the cylinder block.
4. Install the cylinder head on the block.
5. Measure the diameter of each cylinder head bolt at
ooint A and Doint B.
a 50 mm (2.0 in.l
f.f )>-
A '15 mm {'1.8 in.)"<>.
lf either diameter is less than 10.6 mm {0.42 in.),
replace the cvlinder head bolt.
(cont d)
6-39

Cylinder Head
8.
Cylinder Head lnstallation (cont'd)
7.Apply engine oil to the bolt threads and under thebolt heads of all the cylinder head bolts.
Tighten the cylinder head bolts in sequence to 39N.m {4.0 kgf.m, 29 lbf.ft). Use a beam-type torquewrench. When using a preset-type torque wrench,be sure to tighten slowly and do not overtighten. lf
a bolt makes any noise while you are torquing it,
loosen the bolt and retighten it from the first step.
9.After torquing, tighten all cylinder head bolts in twosteps (90" per step). lf you are using a new cylinderhead bolt, tighten the bolt an extra 90..
FIRST STEP
SECOND STEP
6-40
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10. Installthe rocker arm assembly {see page 6-38).
1't .Install the water bypass hose (A).
---l.-.
B6x1.0mm'r2 N.m(1.2 kgl.m,8.7 lbf.ftl
12.
't3.
c6xl.0mm'12 N,m (1.2 kgt.m,8.7 lbf.ft)
Tighten the connecting pipe mounting bolt (B) andbrake booster vacuum line mounting bolts (C), theninstallthe harness holder (D) on the bracket.
Installthe upper radiator hose {A) and heater hose(B).

14. Installthe water bvpass hose.
15. Installthe air cleaner housing (see step 37 on page
5-15).
16. Installthe intake manifold (see page 9-5).
17. Installthe exhaust manifold (see page 9-7).
'18. Installthe cam chain (see page 6-15).
19. Adjust the valve clearance (seepage6-9).
20. Installthe drive belt (see page 4-26).
21. Clean the battery posts and cable terminals with
sandpaper, then assemble them and apply grease
to prevent corrosion.
22. After installation, checkthatall tubes, hosesand
connectors are installed correctly.
23. Inspectforfuel leaks. Turn the ignition switch ON
{ll) {do not operate the starter) so that the fuel pump
runs for about 2 seconds and pressurizes the fuel
line. Repeat thls operation two or three times, then
check for fuel leakage at any point in the fuel line.
24. Refillthe radiator with engine coolant, and bleed
air from the cooling system with the heater valve
open (see page 10-6).
25. Inspect the idle speed (see page 11-'138).
26. Inspect the ignition timing (see page 4-17).
Gylinder Head Cover lnstallation
1. Thoroughly clean the head cover gasket and the
groove.
2. Installthe head cover gasket (A) in the groove of
the cylinder head cover (B).
Check that the mating surfaces are clean and dry.
Apply liquid gasket. P/N 08718-0009, on the chain
case and the No.5 rocker shaft holder mating areas.
NOTE: Do not install the parts if 5 minutes or more
have elapsed since applying liquid gasket. Instead,
reapply liquid gasket after removing old residue.
(cont'd)
6-41

Gylinder Head
Cylinder Head Gover Installation (cont'd)
Set the spark plug seals (A) on the spark plug tubes.
Once the cylinder head cover (B) is on the cylinderhead, slide the cover slightly back and forth to seat
the head cover gasket.
Inspect the cover washers (C). Replace any washer
that is damaged or deteriorated.
6-42
7. Tighten the bolts in two or three steps. In the final
step, tighten all bolts, in sequence, to 9.8 N.m (1.0
kgf.m, 7.2 lbf.ft).
8. Install the dipstick (A) and breather hose iB).
\
\l'

Engine Block
Crankshaft and Piston Removal
1. Remove the engine assembly (see page 5-2).
2. Remove the transmission (see page 13-4).
3. Remove the oil pan (see page 7-1 1).
4. Remove the oil pump {see page 8-9).
5. Remove the cylinder head (see page 6-23).
6. Remove the baffle plates.
7. Remove the 8 mm bolts.
E
7-12
8. Remove the bearing cap bolts. To prevent warpage,
unscrew the bolts in sequence 1/3 turn at a time:
repeat the sequence until all bolts are loosened.
Remove the lower block and bearings, Keep all
bearings in order.
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23. Install the baffle plates.
6x1.0mm12 N.m(1.2 ksf m, 8.7 lbf ft)
24. Installthe oil pump (see page 8-14).
25. Installthe oil pan (see page 7-27).
26. Installthe cylinder head (see page 6-39).
27. Installthe transmission (see page 13-8).
28. Installthe engine assembly (see page 5-9).
1.
OilPan lnstallation
Remove old liquid gasket from the oil pan mating
surfaces, bolts, and bolt holes.
Clean and dry the oil pan mating surfaces.
Apply liquid gasket, P/N 08718-0009, evenly to the
cylinder block mating surface of the oil pan and to
the inner threads of the bolt holes.
NOTE: Do not install the parts if 5 minutes or more
have elapsed since applying liquid gasket. Instead,
reapply liquid gasket after removing old residue.
Installthe oil pan.
Tighten the bolts in two or three steps. In the final
step, tighten all bolts, in sequence, to 12 N.m (1.2
kgf m, 8.7 lbf.ft).
(cont'd)
2.
3.
4.
5.
Apply liquid gasketalong the broken line.
(}@
7-27

Intake Air System
Refer to the System Diagram to see the functional
layout of the system.
Intake Air Bypass Control Thermal Valve
When the engine is running, the intake air bypass
control thermal valve sends air to the iniectors,
INJECTOR
Throttle Body
The throttle body is a single-barrel side draft type. lt
houses the TP senser and the IAC valve. The lower
portion of the IAC valve is heated by engine coolant
from the cylinder head.
IAC VALVE
{cont'd)
11-33

WC OilControl Solenoid Valve Removal/Test
1. Remove the WC oilcontrol solenoid valve (A).
NOTE: lnstall the valve in the reverse order of
removal with a new o-ring (B), then check these
tlems:
Clean and dry the VTC oil control solenoid valve
mating surface.
Coat the O-ring with engine oil.
Do not install the VTC oilcontrol solenoid valve
while wearing fibrous gloves,
Be careful not to contaminate the cylinder head
openrng.
Check the VTC oil control solenoid valve filter for
clogging. lf it is clogged, replace the VTC oil control
solenoid valve.
Check the clearance between the port (advance
side) and the valve. The clearance (A) should be at
least 2.8 mm (1/8 in.).
Connect the battery positive terminal to VTC oil
control solenoid valve 2P connector terminal No. 2.
VTC OIL CONTROL SOLENOIDVALVE 2P CONNECTOR
Terminal side oJmale terminals
Connect the battery negative terminal to VTC oil
control solenoid valve 2P connector terminal No. 1,
then make sure the valve (A) opens fully.
BATTERY
11-127