1999 HONDA CIVIC no. 25

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.

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

Disassembly/Reassembly
NOTE:
. ldentify parts as they are removed to ensure reinstallation in original locations'
. lnsDect rocker shafts and rocker arms (see page 6-35).
. Rocker arms must be installed in the same position if reused.
. when removing orinstallingthe rocker arm assembly,donot remove the camshaft holder bolts. The boltswill keepthe
holders, springs and rocker arms on the shaft.
-Zl prio, ,o reassemblinq, clean all the pans in solvent, dry them and apply lubricant to any contact points.
| - TNTAKE RocKER TNTAKE RocKER
D16Y7 engine:
Lefter "8" is stampedon rocker arm.
ARM A(4 placeslARM B
14 places)
INTAXE
ROCKER SHAFTSPRING{4 places)
ROCKER SHAFTCOLLAR14 plac.3l
ROCKER
I
II
I
BA\'A
fift L$\ft
:oo)[*o:
llll.I Jol----tNo.3 CAMSHAFT | | ruo. z cltusxerr 1i
T-* l=Bl-* d
,", 'l l=^ ^l
qJ?[l'-qJ'Ll
'I^ B A
EI
[ilHl"\9
t(cont'd)
6-31

Rocker Arms
Disassembly/Reassembly (cont'dl
NOTE:
. ldentify pans as they are removed to ensure reinstallation in original locations.. Inspect rocker shafts and rocker arms (see page 6-34).. Rocker arms must be installed in the same position if reused.t when removing or installing the rockerarm assembly, do not remove the camshaft holder bolts. The boltswill keeptheholders, springs and rocker arms on the shaft.
I erior to reassembring, crean a

the parts in sorvent, dry them and appry rubricant to any contact points.
D16Y5 engine:
ROCKER ARMS
TIMING PLATERUBBER BANO
(\
-]-
-P'g,rpt+.t't ll
\--,?|, -\2i lNo.5 CAMSHAFT _ lHOLDER l
No. 4 CAMSHAFTHOLDERNo. 3 CAMSHAFIHOLDERNo.2HOLDER
ra
I
EXHAUST ROCKERARM B{,1 plac€s)
EXHAUST ROCKEE SHAFT
Letter "A" is slamped
II{TAKE ROCKER SHAFT
!-r I
?h'ffi*ffi'
/^ ---IOCKER SHAFT
Letter "8" is stamped
6-32

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

Valves
Camshaft/Rocker Arms and
Camshaft Seal/Pulley
Installation (cont'd)
4. Install the valve spring and valve retainer. then
install the valve spring compressor. Compress the
spring and installthe valve keepers.
NOTE: Place the end of the valve spring with close-
ly wound coils toward the cylinder head.
lCornmercially available)Snap-on CFrll or KD - 3tX'with #32 JAWS
Lightly tap the end of each valve stem two or three
times with a plastic mallet to ensure proper seating
of the valve and valve keepers.
NOTE: Tap the valve stem only along its axis so you
do not bend the stem.
' 6-44
Installation
CAUTION:
. Make sure that all tockers are in alignment with their
valvgs when torquing the rocket assembly bolts,. Valve locknuls should be loosened and adiusting
screws backed off bofore installation.
. To prevont tho rocker arm a$smbly from coming
apad, l6av€ the camshaft holder bohs in the holdeB.
1. After wiping down the camshaft, camshaft seal andjournals in the cylinder head, lubricate both sur-
faces and install the camshaft.
2. Clean and install the oil control orifice with a new
O-ring.
CAMSHAFT SEALSeal housing surface should be dry.Apply a light coat of oil to camshaftand inner lip of seal.
3. Turn the camshaft until its keyway is facing up (No.
piston TDC).
OIL CONTROL ORIFICE

Cylinder Head
4. Apply liquid gasket (Part No. 08718 - 0001 or 08718 -
0003) to the head mating surfaces of the No. 1 and
No.5 camshaft holders.- Apply liquid gasket to the shaded areas
Set the rocker arm assemblY in place and loosely
installthe bolts.- Make sure that the rocker arms are properly posi-
tioned on the valve stems.
Tighten each bolt two turns at a time in the sequence
shown below to ensure that the rockers do not bind
on the valves.
Specitied torquo:
8 mm bolts: 20 N.m (2.0 kgt'm, l/t lbf'ft)
Apply engine oil to the threads.
6 mm bolts: 12 N.m {1.2 kgif'm, 8.7 lbf'ft)
Apply engine oil to the thresds.
6 mm bolts: O, @. @, @
7. Install the back cover. then install the camshaft pul-!
6-45
lnstallation
lnstallthe cylinder head in the reverse order of removal:
NOTE:
. Always use a new head gasket.
. Cylinder head and cylinder block surface must be
clean.
. "UP" mark on the camshaft pulley should be at the top
. Turn the crankshaft so the No. 1 piston is at TDC (see
page 6-20).
. Clean the oil control orifice before installing.
a Do not use the upper cover and lower cover to store
removeo rlems.
Clean the upper cover and lower cover before instal-
taUon.
Cylinder head dowel pins must be aligned.1.
CYUNOER HEAD
PINS
(cont'd)