removal HONDA CIVIC 1997 6.G User Guide

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

10. Using a downward motion on the lever arm, com-
.press the valve spring and remove the keepers from
the valve stem. Slowly release pressure on the
spring.
11. Remove the valve seals (see page 6-38).
12. Install the valve seals {see page 6-43).
13. Install the springs, the retainers and the keepers in
reverse order of removal.
Exhaust Valvs Sesls:
Select the 7/8 in. diameter short compressor attach-
ment, and fasten the attachment to the No. 2 hole of
the lever arm with the speed pin supplied.
Position the lever arm under the cross shaft so the
lever is perpendicular to the shaft and the compres-
sor attachment rests on top of the retainer for the
spring being compressed. Use the front position
slot on the lever as shown.
'14.
IN-CAR SPRING COMPRESSOR
7/8 in SHORT ATTACHMENT
L
16.Using a downward motion on the lever arm, com-
press the valve spring and remove the keepers from
the valve stem. Slowly release pressure on the
spnng.
Remove the valve seals {see page 6-38),
Install the valve seals (see page 6-43).
Install the springs, the retainers and the keepers in
reverse order of removal.
Repeat steps 6 to 19 on the other cylinders.
't7.
'18.
19.
20.
6-15

Timing Belt
Illustrated lndex
NOTE:
. Refer to page 6-20 for how to position the crankshaft and pulley before installing the belt.
. Mark the direction of rotation on the belt before removing.
a Do not use the upper cover and lower cover for storing removed items,
. Clean the upper cover and lower cover before installing.
. Replace the ca mshaft seals and cra n kshaft sea ls if there is oil leakage.
. Refer to page 6-16 before installing the timing belt.
CYLINDER HEADCOVERReler to page 6-46when installing.
HEAD COVEB GASKETReplaco when l6akin9,domaged or deteriorated.Apply liquid gasket at
th€ lour corners of thetecessos.
d
@
TIMING BELTInspection, page 6-18Adjustment, page 6-18Removal, page 6-19Installation. page 6-20
I x 1.25 mm3t N.m {3.8 kgf'm, 27 lbfftl
Apply engine oilto the bolt
thleads.
CRANKSHAFT SPEED FI.UCTUATION
lcr(Fl sENsoRReplacement, Page 6-22
UPPER COVEB
lnstallwithsurface facing in.
TIMING BELTDRIVE PULLEYReplacement, page 6_16
6x1.0mm9.8 N'm 11.0 kgt m,7.2 tbf.ft)NUBBER SEALSReplace when damagedor deledorated.
LOWER COVER
FUBBERPLUG
CRANKSHAFT PULLEYReplacement, page 6'16
PULLEY BOLTlil x 1.25 mm20 N.m 12.0 kgt.m,14 lbt'ft) + 90"Replacement, page 6'16Do not us6 an impactwrench when installing.
x 1.0 mmBOLT o-RING10 x 1,25 mm Reolace.14 N.m {,1.5 kgt m, 33 lbt ftl
6x1.0mmt2 N.m 11.2 kgf'm,8.7 tbt f0
9.E N'm (1.0 kgt.m,?.2 tbf.ftl\.-,o
6-17

Removal
NOTE:
. Replace the timing belt at 105,000 miles (168.000 km)
according to the maintenance schedule (normal con-
ditions/severe conditions).
lf the vehicle is regularly driven in one or more of the
followlng conditions, replace the timing belt at 60.000
miles (U.S.A.) 100,000 km {Canada).
.In very high temperatures (over 110'F.43'C)
. In very low temperatures (under -20'F, -29"C)'
! Turn the crankshaft pulley so the No. 1 piston is at
top dead center (TDC) before removing the belt (see
page 6'21).
. Inspect the water pump before installing the timing
belt {see Page 10-14).
1. Remove the splash shield (see page 5-7).
2. Loosen the mounting bolt and lock bolt. then remove
the power steering (P/S) pump belt and pump
MOUNTING BOLT
8 x 1.25 mm2il N m 12.4 kgl m, 17 lbf'ft)
P/S PUMPBELT
I x 1.25 mm24 N m (2.4 kgf m, 17 lbt ft)
Loosen the idler pulley center nut and adjusting
bolt, then remove the air conditioning (AVC) com-
pressor belt (see Page 5-6).
Loosen the mounting nut and lock bolt, then remove
the alternator belt.
ALTERNATORBELTLOCK BOLTI x 1.25 mm24 N.m 12.4 kgf.m,r? tbI.ft)
3.
MOUNTING NUT10 x 1.25 mm44 N.m 14.5 kgl m,
33 rb{ ft)
5. Remove the dipstick, then remove the upper cover
and idler PulleY bracket
NOTE: Do not use the upper cover to store removed
items.
6x1.0mm9.8 N.m 11.0 kgf.m,7.2
IDLERI x 1.25 mm24 N.m (2.4 kgl.m, 17 lbf'ft)BRACKET
6. Remove the upper bracket {see page 6-29)
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.
Remove the crankshaft pulley (see page 6-16).
Remove the lower cover and dipstick tube
NOTE; Do not use the lower cover to store removed
items.
1.
.'.
DIPSTICK TUBE
LOWER
6x1.0mm9.8 N.m (1.0 kgf m,
7.2 rbt.ft)
(cont'd)
6-19
Replace.

Timing Belt
Removal (cont'd)
9. Remove the CKF sensor from the oI pump.
10. Loosen the adjusting bott lgO..to remove tension from theretighten the adjusting bolt.
12 N.m 11.2 kgt.m,8.7 rbf.ftl
Push the tensioner
timing be lt. then
AD.'USNNG BOLT4{ N.m 14.5 kgt m,33 tbtftl
1 1. Remove the timing belt.
6-20
lnstallation
Install the timing belt in the reverse order of removal;Only key points are described here.
l. set rhe timing belt drive pulley so that the No. 1 pis-ton as at top dead center (TDC), Align the groove onthe timing belt drive pulley to the pointer on the oilpump.
TDC MARKPOINTER
I
t
I
TIMING BELTDBIVE PULLEYClean.I
2. Set the camshaft pulley to TDC. Align the TDCmarks on the camshaft pulley to the cylinder headsurface.

Crankshaft Speed Fluctuation (CKF) Sensor
2.
3.
5.
Replacement
4.
1.
6x1.0mm'12 N.m {1.2 kgt.m,8.7 tbf.ft)
6. Installthe CKF sensor in reverse order of removal.
Remove the cylinder head cover.
NOTE: Refer to page 6-46 when installing.
Remove the crankshaft pulley (see page 6_16),
Remove the upper cover and dipstick/tube {seepage 6-19).
Remove the lower cover and idler pulley bracket(see page 6-19).
Disconnect the CKF sensor connector, then removethe CKF sensor.
CKF SENSORCONNECTOR
6-22
:(
I

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