Head HONDA CIVIC 1997 6.G Owner's Guide

Valve Guides
Replacement (cont'd)
Working from the camshaft side, use the driver andan air hammer to drive the guide about 2 mm (0.1 in)towards the combustion chamber. This will knock offsome of the carbon and make removal easier.
CAUTION:
. Always wear satety goggles or a face shield when
driving valve guides.
. Hold the air hammer directly in line with thevalve guide to prevent damaging the driver.
Turn the head over, and drive the guide out towardthe camshaft side of the head.
VALVE GUIOE ORIVER,5.5 mm07742 - 001 01 00
It a valve guide still won't move, drill it out with a8 mm {5/16 in) bit, then try again.
CAUTION: Drill guides only in extreme cases; you
could damage the cylinder head it the guide breaks.
6. Remove the new guides from the freezer, one at atime, as you need them.
6-42
I7. Apply a thin coat of clean engine oil to the outsideof the new valve guide. Install the guide from thecamshaft side of the head; use the special tool todrive the guide in to the specified insralled height. lfyou have all 16 guides to do, you may have to reheat
the head.
VALVE GUIOEDRIVER,5.5 mm07742 - 0010100
ll
Valve Guide lnstalled Height:
Intake: 17.85 - 18.35 mm (0.703 - 0.722 inl
Exhausi: 18.65 - 19.15 mm (0.734 - 0.754 in)
VALVE GUIDE

Valves
Reaming
NOTE: For new valve guides only.
1. Coat both the reamer and valve guide with cufting
orl.
2. Rotate the reamer clockwise the full length of the
valve guide bore.
3. Continue to rotate the reamer clockwise while
removing it from the bore.
4. Thoroughly wash the guide in detergent and water
to remove any cutting residue.
5. Check the clearance with a valve (see page 6-391.
Verify that the valve slides in the valve guide with-
out exerting Pressure.
Turn reamer inclockwise direclionon ly.
REAMER, 5.5 mmO7HAH. PJ'O'IOB
I
REAMER
oa)o,
o
o
1.
lnstallation
Coat valve stems with engine oil. Insert the valves
in the valve guides.
NOTE: Make sure lhe valves move up and clown
smoothly.
lnstallthe spring seats on the cylinder head.
Install the valve seals using the valve guide seal
installer.
NOTE: Exhaust and intake valve seals are not inter-
changeable.
2.
3.
WHITESPRINGBLACKSPRING
INTAKE VALVE SEALEXHAUST VALVE SEAL
VALVE GUIDE SEALINSTALLERKD2899 (Commercially available)NOTE: Use small lD end of
P
(cont'd)
6-43

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)

Cylinder Head
Installation (cont'dl
Position the camshaft correctly (see page 6-20).
Tighten the cylinder head bolts sequentially in four
steps.
rsr st.p: O - @ 20 N.m (2.0 kgf.m, 14 lbf'ft|
2nd srep: O - @ 49 N.m (5.0 kgf.m, 36 tbtft)
3rd stop; O - @ 67 N.m {6.8 kgf.m, /r9 lbl'ft}
4th st6p: O, O 67 N.m 16.8 kgf.m, 49 tbf.ftl
NOTE:
. We recommend using a beam-type torque
wrench, When using a preset-type torque wrench.
be sure to tighten slowly and not to overtighten.
. If a bolt makesany noisewhileyou aretorquing it,
loosen the bolt, and retighten it from the 1st step,
CYLINDER HEAD BOLTS TOROUE SEOUENCE:
Install the intake manifold and tighten the nuts in a
crisscross pattern in two or three steps, beginning
with the inner nuts (see pages 9-2 thru 9-4).
. Always use a new intake manifold gasket.
Install the exhaust manifold and tighten the nuts in
a crisscross pattern in two or three steps, beginning
with the inner nut {see pages 9-6 and g-7).
. Always use a new exhaust manifold gasket.
Install the exhaust manifold bracket. lnstall the
exhaust pipe A and the bracket, then install the cover.
4.
6-46
\-
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7.Installthe timing belt (see page 6-20).
Adjust the valve clearance (see page el2),
Install the head cover gasket in the groove of the
cylinder head cover, Seat the recesses for the
camshaft first, then work it into the groove around
the outside edges.
NOTE:
. Before installing the head cover gasket, thor-
oughly clean the seal and the groove.
. When installing, make sure the head cover gas-
ket is seated securely in the corners of the
recesses wath no gap.
COBNERS OFTHE RECESS
CORNERS OFTHE REcEss covEB
Apply liquid gasket to the head cover gasket at the
four corners of the recesses.
NOTE:
. Use liquid gasket, Pan No. 08718 - 0001 or 08718- 0003.
. Check that the mating surfaces are clean and dry
before applying liquid gasket.
. Do not install the parts if five minutes or more
have elapsed since applying liquid gasket.
Instead, reapply liquid gasket after removing old
residue.
. After assembly, wait at least 30 minutes before
filling the engine with oil.
8.
9.
I
10.

11. When installing the cylinder head cover, hold the
head cover gasket in the groove by placing your fin-
gers on the camshaft holder contacting surfaces
(top of the semicircles)
Set the spark plug seal on the spark plug tube.
Once the cylinder head cover is on the cylinder
head, slide the cover slightly back and forth to seat
the head cover gasket.
NOTE:
. Before installing the cylinder head cover, clean
the cylinder head contacting surfaces with a
shop towel.
. Do not touch the parts where liquid gasket was
aDolied.
. Take care not to damage the spark plug seals
when installing the cylinder head cover,
. Visually check the spark plug seals for damage.
. Replace any washer that is damaged or deterio-
rated.
6x1.0mm9.8 N.m 11.0 ksf.m,7.2lbf ftl
\g-----*o""t'Ptl
veEE
\_
6-47
12. Tighten the nuts in two or thre€ steps. In the final
step, tighten all bolts, in sequence, to 9 8 N'm (1.0
kgf.m, 7.2 lbf.ft).
NOTE: After assemblv, wait at least 30 minutes
before filling the engine with oil
After installation, check that all tubes, hosss and
connectors are installed correctlY
1?

Gylinder Head/Valve Train
816A2 engine
Special Tools ............. 6'50 Rocker Arms
VTEC Contlol System
Troubfeshooting Flowchart ............ 6-51 Disassembly/Reassembly ...............6'72
VTEC Solenoid ValveRocker Arms and Lost Motion Assemblies
Inspection ...""'...... 5-54 Inspection .........""' 6-73
VTEC Rocker ArmsRocker Arms and Shafts
Manual Inspection ........................... 6-54 Clearance Inspection ..'..."'.............. 6-74
Inspection Using Special Tools .....' 6-55 Camshafts
Valve Clearance
.^ Adiustment .........." 6-57 Valves'Valve Springs and Valve Seals
. t Crankshaft Pulley and Pulley Bolt Removal """"""""' 6-77
Replacement ..".....6-59 Valve Seats
Timing BeltReconditioning ......6'78
Cylinder Headlnstallation '............ 6-82

VTEC Solenoid ValveVTEC Rocker Arms
a
I
(
Inspection
1. Remove the VTEC solenoid valve assembly fromthe cylinder head. and check the VTEC solenoidvalve filter for clogging.
. lf there is clogging, replace the engine oilfilter andengine oil.
6x1.0mm12 N.m (1.2 kgf.m, B,7 tbf.ftl
lf the filter is not clogged. push the VTEC solenoidvalve with your finger and check its movemenr.
. lf the VTEC solenoid valve is normal, check theengine oil pressure.
6x1.0mm12 N.m (1.2 kgtm,8.7 lbt.ft)
6-54
L-
SOLENOID
Manual Inspection
1. Set the No. 1 piston at TDC.
2. Remove the ignition wire cover and the wires.
3. Remove the ignition clamps while pulling up on theIock.
6xl.0mm9.8 N.m (1.0 kgl.m, 7.2 tbtftl
IGNITIONWIRE COVER
IGNITIONWIRE
\
LOCK

Remove the cylinder head cover.
NOTE: Refer to page 6-88 when installing the cylin-
der head cover.
Push the mid rocker arm on the No. 1 cylinder man-
ually.
Check that the mid rocker arm moves independently
of the primary and secondary rocker arms.
Check the mid rocker arm ot each cylinder at TDC'
. lf the mid rocker arm does not move, removs the
mid, primary and secondary rocker arms as an
assembly and check that the pistons in the mid
and primary rocker arms move smoothly.
. lf any rocker arm needs replacing, replace the
primary. mid, and secondary rocker arms as an
assembly.
7.
2. Plug the
per).
Inspection Using SPecial Tools
CAUTION:
. B€fore using tho Yalvo inspeciion tool, mako suro
that ths air pre3sure gauge on the air comprossor
indicatos ovor /rco kPa (,1 kgf/cm', 57 psi)
. In3poct ths valve closranca bafore rock$ arm impoc'
tion.
. Cover the timing beh whh I shop towel to prcvenl
gstting oil on the bolt'
. Chock ths mid rocker arm of each cylindll at TDC'
1. Remove the cYlinder head cover.
NOTE: Rsfer to page 6-86 when installing the cylin-
der head cover.
relief hole with the special tool (Air Stop-
OTLA' - PRSO2OA
3. Remove the bolt and washer from the inspection
hole and connoct the an air pressure regulator with
a 0 - 100 psi gauge.
AIF STOPPEBTNSPECTION HOIEOTLA' - PR3O2OA
t0 x 1.0 mrn20 N.m {2.0 kgf m,14 tbt'fr)
AIR PRESSUREREGULATOR{Cornm.rcirlly avril.bl.lBEGULATOR VALVE. Pull the lever andturn to adjust.{cont'd}
6-55

Valve Glearance
Adjustment
NOTE:
. Valves should be adjusted only when the cylinder
head temperaturs is less than 100'F (38'C)'
. After adjusting, retorque the crankshaft pulley bolt to
177 N.m (18.0 kgf'm, 130 lbt'ft)
1. Remove the cylinder head cover'
NOTE: Refer to page G86 when installing the cylin-
der head cover.
2. Set No. 1 pi$on at TDC. The "UP" mark on the pullsy
should be at the top, and TDC grooves on the pulley
should align with the pointer on the back cover' TDC
grooves {white paint) on the crankshaft pulley should
align with the pointer on the timing belt lower cover'
Number I Piston at TDC:
4.
Adjust valves on No. 1 cylinder.
lntako: 0.15 - 0.19 mm {0'006 - 0.007 in)
ExhaGt 0.17 - 0.21 mm {0'007 - 0 008 inl
Loosen the locknut, and turn the adjusting screw
until the feeler gauge slides back and forth with a
slight amount of drag.
TAPPET ADJUSTERWFENCH SET07MM - PR70110
TAPPET LOCKNUTWRENCH07MAA - PR70120
Adiusting sclaw location:
LOCKNUT20 N.m {2.0 kgf'm, lil lbt'ftl
(cont'd)
6-57