Page 111 of 1413

Timing Belt
Removal lcont'd)
1.Remove the cylinder head cover.
. Refer to page 6-78 when installing.
Remove the pulley bolt and crankshaft pulley (see
page 6-47).
Remove the middle cover and the lower cover.
NOTE:
. Do not uss the middle cover and lower cover for
storing items disassembled.
a Clean the middle cover and lower cover before
installation.
Loosen the adjusting boh 180'.
Push the tensioner to r€move tension from the tim-
ing belt, then retighten the bolt.
Remove the timing belt from the pulleys.
10.
12.
11.
8.
a
6x1.0mm9.8 N.m 11,0 kgf'm, 7.2 lbl'ftlWASHERReplace whenor deteriorated.
CYLINDEROOVERRel€r to pago 6-78when inslalling.
NMING BELTAdjustment, page 6-48
MIDDLECOVER
RUABER SEALSReplac6 whenor deteriorated.
6x1.0mm9.8 N.m {1.0 kgf.m,7.2 rbnftl
LOWER COVER
6r1.0mm9.8 N.m 11.0 kgf.m,7.2lbtftl
CRANKSHAFT PULl"EYRemove any oil andclean on the timing beltguide plat6 side.
BELTTENSIONER
TIMING BELTGUIDE PLATElnstallwith concavesurface facing out.Remove any oiland clean.PULI.TY BOLT17? N m {18.0 kgf.m, 130lbtftlADJUSNI{G BOLT10 x 1,25 mm5,t N.m 15.5 kgf.m,.(l rbf.fttFor adjustm€nt only,
@^Rv@
Page 112 of 1413
Timing Belt
lnstallation
Install the timing belt in the feverse order of removal;
Only key points are described there.
NOTE: Clean the middle cover and lower cover before
installation.
1. Position the crankshaft and the camshaft pulleys as
shown betore installing the timing belt.
A. Set the crankshaft so that the No. 1 piston is at
top dead center {TDC). Align the groove on the
teeth side of the timing belt drive pulley to the V
pointer on the oil pump.
B. Align the TDC marks on intake and exhaust pul-
leys.
2. Install the timing belt tightly in the sequence
shown.
O Timing belt drive pulley (crankshatt) * @
Adjusting pulley * @ water pump pulley * @
Exhaust camshaft pulley * @ Intake camshaft pul-
lev,
(cont'd)
6-51
Page 114 of 1413
Cylinder Head
lllustrated Index
CAUTION: To svoid dsmaging the cylindor h.ad, wsit until tho engino coollnt tomper.turo drop3 bolow 100'F (38'C)
bofore romoving it.
NOTE:
r Use new O-rings and gaskets when reassembling.
. Use liquid gasket, Pan No. 08718 - 0001.
. Replace the rubber seals for oil leakage between the cylinder headand cover.
fterw ,o reassembling, clean all the parts in solvent, dry them, and apply lubricant to any contact parts.
6x1.0mm9.8 N.m (1 .0 kgt'm,7.2tblftl6xl.0mm9.8 N.m {1.0 kgl m, 7.2 lbf.ftl
4qis
CAMSHAFT
f,
f
6 x 1.25 mm2it t*m 12.4 kg[.m,17 rbf.ftl
8 x 1.25 mm27 N.m 12.8 kgt m,20 rbt ft)
CYLINDER HEADCOVERRefer to psge 6-78when instglling.
liquid gasketto thos€ points.INTAKECAMSHAFT
SEALReplace.Replace when damagedor det€riorated,
r 1.25 mm56 N.m 15.7 kg{.m,ial lbf.ft)
Replace.
6-53
Page 115 of 1413
NOTE: Clean the head oil control orifice and the rocker shaft orifices when installino.
ROCKEB ARM ASSEMBLY
Apply clean engine oilto threads and washercontact surface.
81 N m (8.3 ks{ m, 60
VALVE
SPRING RETAINER
CYLINDER HEADBOLTS11 x 1.5 mm
EXI{AUST VALSPRING
INTAKE VALVE SPRING INNER
SPRING RETAINER
INTAKE VALVE SPRING OUTER
SPRING SEATVALVE SEALReplace.
SPRING SEAT
VALVE GUIDE
MOTION
VALVE SEALReplace.
ASSEMBLYINTAKE VALVE
INTAKE ROCKERORIFICE
LOST MOTIONASSEMBLY
VALVE
EXHAUST VAL
Clean.
ROCKER SHAFTDOWELPIN -,
ROCKERSHAFT ORIFICEOOWELPIN
CYLINDER HEAOGASKET13 LAYEBS OF METReplace.
SEALING BOLTS, 20 mm64 N.m 16.5 kgf.m, 47 lbtftl
Page 118 of 1413

ll.Remove the engine wire harness connectors and
wi.e ha.ness clamps from the cylinder head and the
intake manitold.
Four fuel injector connectors
Intake air tempe.ature {lAT) sensor connector
Engine coolant temperature (ECT) sensor con-
nector
TDC/CKP/CYP sensor connector
lgnition coil conn€ctor
ECT gauge sending unit connector
Throttle position (TP) sensor connector
VTEC solenoid valve connector
VTEC Dressure switch connector
Manifold absolute pressure (MAP) sensor con-
nector
ldle air control {lAC) sensor connector
EVAP purge controlsol€noid valvo connector
Intake air bypass {lABl control solenoid valve
conneclor
a
o
a
o
a
a
a
a
a
a
a
a
a
12.
13.
Remove the spsrk plug caps and distributor from
the cylinder head.
Remove the upper radiator hose, heat€r hose and
water bypass hose.
WATER BYPASS
HOSE
6r1.0mm9.8 N.m (1.0 kgt m,1.2 tbtftl
14. Remove the sDlash shield.
Remove the engine ground cable.
Romovo the adjusting bolt and mounting bolts, then
remove the power steering (P/S) pump belt and P/Spump.
. Do not disconnect the P/S hoses.
(cont'dl
15.
6x1.0mm9.8 N.m 11.0 kgl.m,7.2 tbt.ttl
6-57
,l
Page 123 of 1413
Rocker Arms
lnspection
NOTE: When reassembling the
carefully apply air pressure to t
rocker arm.
Inspect the rocker arm piston.- lf it does not move smoot
arm assembly.
xva
V/\'Check piston movement
. Apply oilto the pistons whe
. Bundle the rocker arms wi
keep them together as a set.
PISTONS
) primary rocker arm,
the oil passage of the
Remove the lost motion assembly from the cylinder
head and inspect it. Test it by pushjng the plunger
with your finger.- lf the lost motion assembly does not move
smoothlv, reDlace it.
ROCKER ARMPush
t
SECONDARYLOST MOTION ASSEMBLY
ciston. Push it manually.
smoothly, replace the rocker
when reassembling.
s with a rubber band to
6-62
Page 126 of 1413

Camshafts
Inspection
4,
5.
9.
1.
Remove the bolts, then remove the camshaft hold-
ers from the cvlinder head.
NOTE: Unscrew the camshaft holder bolts two
turns at a time, in a crisscross pattern.
Lift camshaft out of cylinder head. wipe clean, then
inspect lift ramps. Replace camshaft if lobes are pit-
ted, scored, or excessively worn.
Clean the camshaft bearing surfaces in the cylinder
head. then set camshaft back in place.
Place a plastigage strip across each journal.
Install the camshaft holders, and then tighten the
bolts to the specified torque as shown in the left
column on this page.
NOTE: Do not rotate camshafts during inspection.
Remove the camshaft holders. Measure widest Dor-
tion of plastigage strip on each journal.
Camshaft-to-Holder Oil Clearance:
Standard {New): 0.050 - 0.089 mm
{0.002 - o.Ooil in)
Sswice Limit: 0.15 mm (0.006 in)
(cont'dl
NOTE:
. Do not rotate the camshaft during inspection.
. Remove the rocker arms and rocker shafts.
1. Put the camshafts and camshaft holders on the
cylinder head, and then tighten the bolts to the
soecified torque.
Specified Torque:
O - @: 8 mm bolts 26 N.m {2.7 kgl.m,20 lbt'ftl(D -(D:6 mm bolts 9.8 N.m {1.0 kgt.m, 7.2 lbf'ftl
Seat each camshaft by pushing it toward distributor
end of the cylinder head.
Zero the dial indicator against end of distributor
drive, then push the camshaft back and forth and
read the end play.
Camshaft End Play:
Standard (New): 0.05 - 0.15 mm
10.002 - 0.006 inl
Sawics Limit: 0.5 mm (0.02 inl
oooo@
Page 127 of 1413

Gamshafts
Inspection (cont'd)
10, lf camshaft-to-holder oil clearance is out of loler-
ance:
- And camshaft has already been replaced, you
must replace the cylinder head.
- lf camshaft has not been replaced, first check
total runout with the camshaft supported on V-
blocks.
Camehaft Total Runout:
Sisndard (New): 0.015 mm (0.0006 inl
Service Limit: 0.03 mm (0.0012 in)
Rotat€ camshsftwhile measuring
- lf the total runout of the camshaft is within toler-
ance, replace the cylinder head.- lf the total runout is out of tolerance, r€Dlace the
camshaft and recheck. lf the oil clearance is still
out of tolerance. replace the cylinder head.
6-66
IiITAKEEXHAUST
PRIMARY33.i{'l1 mm
(1.3154 inl
33.111 mm(1.3036 in)
MID36.377 mm
l't.4322 inl
35.720 mm
(1.4063 inl
SECONDARY34.547 mm(1.3601 in)
34.381 mm(1.3536 in)
11. Check cam lobe wear.
Clm Lobs Hcight Standard (N.w):
Check this are6 tor wsar.
Crm Porition
INTAKE
MtosEc
CXHAUST
SEC MID PRI
fTt-]--Tt-Tt-l
\ll il il|/
tt ttlLIL__H___}{-}U
ftBftB
T/B: nMING BELTPRI: PRIMAFYMID: MIDSEC: SECONDARY