1998 HONDA CIVIC Intake

Valve Seals
Replacement (Cylinder head removal not requiredl
NOTE: Cylinder head removal is not required in thisprocedure.
The procedure shown below applies when using the in-
car valve spring compressor (Snap-on YA884S withY48845 - 2 A7/8" attachment).
!@@ Alway wear approved eye protection whenusing ihe in-cai valve spring compressor.
1. Turn the crankshaft so that the No. I and the No. 4pistons are at top dead center (TDC).
2. Remove the cylinder head cover and the rocker arm
assembly.
NOTE:
. Refer to page 6-30 for rocker arm assembly
removat.
. When removing or installing the rocker armassembly, do not remove the camshaft holder
bolts. The bolts will keep the holders, springs
and rocker arms on the shaft.
. Refer to page 6-46 when installing the cylinder
head cover.
Remove the fuel injectors and the wire harness.
Using the 8 mm bolts supplied with the tool. mount
the two uprights to the cylinder head at the end
camshaft holders. The uprights fit over the cam-
shaft as shown.
lnsert the cross shaft through the top hole of thetwo uprights.
3.
4.
6-14
Intake Valve Seals:
6. Select the 7/8 in diameter short compressor attach-ment, and fasten the attachment to the No. 4 hole of
the leve. arm with the speed pin supplied.
8.
7.lnsert an air adapto. into the spark plug hole. pump
air into the cylinder to keep the valve closed whilecompressing springs and removing the valve keepers.
Put shop towels over the oil passages to prevent
the valve keepers from falling into the cylinder
neao.
OIL PASSAGES
Position the lever arm under the cross shaft so thelever is perpendicular to the shaft and the compres-
sor attachment rests on top of the retainer for thespring being compressed. Use the front position
slot on the lever as shown.
,
I
i'
OIL PASSAGES
IN-CAR SPRING COMPRESSOR
SLOT

Cylinder Head
lllustrated Index (cont'dl
(-/) _.- E "or to reassembring, crean at the parts in sorvent, dry them and appry rubricant to anv contact oarts.
D16Y7 engine:
ROCK€R ARMASSEMBLYRemoval, page 6 30Inspection, page 6-35
8 x 1.25 mm20 N.m (2.0 kgt.m, 14 tbt.ftlApply engine oil to the
H
B
O-RINGReplace.
INTAKE VALVE SEALReplace.
VALVE SPRINGSEAT
INTAKE VALVEGUIDE
:a
ti
VALVE
SPRING RETAINER
EXHAUST VALVESEAL
VALVE SPRINGSEAT
EXHAUST VALVEGUIDErnspectron, page 6,39Beplacement, page 6 4lAeaming, page 6-43
8 x 1.25 mm37 N m (3.8 kgt m,27 tbtftlApply engine oiltothe threads.
INTAKE VALVERemoval, page 6-38lnstallation, page 6-43
Removal, page 6,27Warpage, page 6 40Valve seat reconditioning,page 6-40Installation, page 6-45
VALVE
t
t
t
CAMSHAFTnspectron, page 6-36
OIL CONTROLORIFICEClean.
KEEPERS
\
EXHAUST VALSPRING
c -A9-2.+
L
6x1.0mm12 N.m (1.2 kst.m, 8.7 tbf.ft)Apply engine oit to thethreads.
VALVE KEEPERS
SPRING RETAINER
INTAKE VALVESPRING

D16Y5 engine:
I x 1.25 mm20 N.m (2,0 kgf m, 14 lbf ft)
Apply engine oilto the
threads.ROCKEB ARMASSEMBLYFemoval, page 6-30
Inspection, Page 6-34
6x1.0mm12 N.m 11.2 kgf m, 8.7 lbf'ftl
Apply engine oilto the
threads.
VALVE KCEPERS
SPRING RETAINER
CAMSHAFTInspection, page 6-36
6x1.0mm12 N,m 11.28.7 tbf.ft)
WEC SOLENOIDVALVEBINTAKE VALVESPRING
INTAKE VALVE SEAL
Replace.
VALVE SPRINGSEAT
INTAKE VALVEGUIDE
CAMSHAFTPUL|'IY
VTEC SOLENOIDVALVE FILTERReplace.
OIL CONTROLORIFICEClean.
VALVE
SPRING RETAINEB
EXHAUST V
SPRING
VE
EXHAUST VALVE
SEALt"o'""".uoau,
SEATReplace.
GUIDEInspection, page 6-39Replacement, Page 6-41
Reaming, page 6-43EXHAUSTVALVEOIL SEALReplace.
HEAD
8 x 1.25 mm
37 N.m 13.8 kgf.m,
27 tbf.frlApply engine oiltothe lhreads.
(cont'd)
6-25
INTAKE VALVERemoval, page 6 38
Installalion, Page 6 43Removal, page 6-27Warpage, Page 6 40
Valve seat reconditioning'page 6-40lnstallation, page 6_45

Cylinder Head
lllustrated Index (cont'dl
VALVE KEEPERS
SPRING RETAINER
INTAKE VALVE
VTEC SOLENOIDVALVE FILTEBReplace.
OIL CONTROLORIFICEClean.
INTAKE VALVE SEALReplace.VALVE SPRINGSEAT
INTAKE VAI.VEGUIOE
CAMSHAFTPULLEY
I
I
VALVE KEEPERS
SPRING RET
EXHAUST VALVESPRING
@
EXHAUST VALVESEALReplace.
8 x 1.25 mm37 N.m 13.8 kgt m,27 tbfitlApply engine oiltothe threads.
EXHAUSTVALVE
-vp
e,.io"o reassembring, crean at the parts in sorvent, dry them and appry rubricant to any contact parts.
D16Y8 engine:
LOST MOTIONASSEMgLY
ROCKER ARMASSEMBLYRemoval, page 6 30Inspection, page 6-34
5xl.0mm12 N.m {1.28.7 tbf.ft)
VALVE SPRINGSEATEXHAUSTVALVE O.RINGGUIDE Replace.Inspection, page 6 39Replacement, page 6 41Reaming, page 6 43
LOST MOTIONASSEMBLYHOLDER
INTAKE VALVEBemoval, page 6 38Installation, page 6 43
20 N.m 12.0 kgl.m, 14 tbf.ft)Apply engine oit to thethreads.
\
\
s9illl
CAMSHAFTInspection, page 6-36
OIL SEALBeplace.
CYLINDER HEADRemoval, page 6 27Warpage, page 6-40Valve seat reconditioning,page 6 40Installation, page 6-45
6x1.0mm12 N.m (1.2 kgt.m,8.7 lbf.ftlApply engine oil to thethreads,

Removal
Engine removal is not required for this procedure
!!!s@ Make sure iacks and salety stands are
f ta"eata"ea propetty and hoist brackets are attached to the
correct positions on the engine.
CAUTION:
. Use tender covels to avoid damaging painted sul-
faces.
o To avoid damage, unplug the wiling connectors
carefully while holding the connector portion to
avoid damage.
. To avoid damaging the cylinder head, wait until the
engine coolant temperature drops below 100"F
{38"C} before loossning the tetaining bolts.
NOTE:
o Mark all wiring and hoses to avoid misconnectlon
Also, be sure that they do not contact other wiring or
hoses, or interfere with other parts.
. Inspect the timing belt before removing the cylinder
h ead.
. Turnthe crankshaft pu lley so that the No. lpistonisat
top dead center (see Page 6-21)
'1. Disconnect the negative terminal from the battery'
Drain the engine coolant (see page'10-7).
a Remove the radiator cap to speed draining.
Remove the intake air duct and air cleaner housing
(see page 5 3).
Remove the mounting bolt and lock bolt. then
remove the power steering (P/S) pump belt and
pump (see page 5'5).
Loosen the idler pulley center nut and adjusting
bolt' then remove the air conditioning (A'lc) com-
pressor belt (see Page 5-6).
Loosen the mounting nut and lock bolt. then
remove the alternator belt (see page 6-19).
Remove the P/S pump bracket (see page 5-12).
3.
4.
2.
6.
1.
8. Remove the throttle cable by loosening the locknut,
then slip the cable end out of the throttle linkage
NOTE:
. Take care not to bend the cable when removing it
Always replace any kinked cable with a new one
. Adjust the throttle cable when installing (see sec-
tion 1 1).
D16Y7 engine:
Dl6Y5, Dl6Y8 engines:
THFOTTLECABLE
(cont'd)
6-27
LOCKNUT
CABLE

13. Remove the upper radiator hose' heater hose and
water bYPass hose
WATEREYPASSHOSEUPPERRADIATORHOSE
14.
HEATERHOSE
Remove the engine wire harness connectors and
wire harness clamps from the cylinder head and the
intake manifold.
o Four fuel injector connectors
. Engine coolant temperature (ECT) sensor con-
nector
a
a
a
ECT switch connector
ECT gauge sending unit connector
Throttle position sensor connector
Manitold absolute pressure (MAP) sensor con-
nector
Primary heated oxygen sensor (primary HO2S)
connector
Secondary heated oxygen sensor (secondary
HO2S) connector (D16Y7 engine)
Exhaust gas recirculation (EGR) valve lift sensor
connector (D16Y5 engine)
. VTEC solenoid valve connector (Dl6Y5, D16Y8
engrnes)
. VTEC pressure switch connector (D16Y5. D16Y8
engrnes,
. ldle air control (lAC) valve connector
15.Remove the spark plug caps and distributor from
the cylinder head.
Remove the uPPer bracket.
NOTE:
. Use a jack to support the engine before the
upper bracket is removed.
. Make sure to place a cushion between the oil
pan and the jack.
12 x 1.25 mm
74 N.m {7.5 kgf m.
sil lbl.ftl
UPPERBRACKET
'17. Remove the cylinder head cover'
CYLINDERHEAD COVER
(cont'd)
6-29

Cylinder HeadRocker Arms
18.
19.
21.
22.
Removal (cont'd)
Remove the timing belt {see page 6-19).
Remove the camshaft pulley and back cover,
CAMSHAFTPULLEYClean when installing.
6x1.0mm8 x 1.25 mm37 N.m (3.8 kgf.m,21 tbtlrlApply engine oilto thebolt threads.
Remove the exhaust manifold {see pages 9-6 and 9_7).
Remove the intake manifold (see pages 9-2 thru 4).
Remove the cylinder head bolts, then remove thecylinder head.
CAUTION: To pr€vent warpage, unsclew lhe bohsin sequonce 1/3 turn at a time; rgpeat tho sequenceuntil all bolts are loosened.
CYLINDER HEAD BOLTS LOOSENING SEOUENGE:
6-30
Removal
1. Loosen the adjusting screws.
2. Unscrew the camshaft holder bolts, then,removethe rocker arm assembly.
NOTE:
a Unscrew the camshaft holder bolts two turns at at,me, in a crisscross pattern, to prevent damao_ing the valves or rocker arm assembly.. When removing the rocker arm assembly, do notremove the camshaft holder bolts. The bolts willkeep the camshaft holders, the springs and therocker arms on the shaft.
CAMSHAFT HOLDER BOLTS LOOSENINGSEOUENCE:
\(
ADJUSTING SCREWS

D16Y8 engine:
No. 5 CAMSHAFTHOLDER
ARM B
ROCKER ARMS
No. 4 CAMSHAFTHOLOER
No. 3 CAMSHAFTHOLDER
No. 2 CAMSHAFTHOLDER
No. 'l CAMSHAFTHOLDER
R(rcKER SHAFTSPRING
Letter "B" is stampedLetter "A" is stamped
L
INTAKE SOCKER SHAFT
ROCKER SI{AFT
COLLARNUBBER BANDCOLLAR
EXHAUST ROCKER SHAFT
6-33