1999 HONDA CIVIC Intake valve

Valve Clearance
I
I
I
Adjustment {cont'd)
5. Tighten the locknut and recheck clearance.Repeat adjustment if necessary.
Rotate the crankshaft 180. counterclockwise(camshaft pulley turns 90'). The "Up" mark shouldbe on the exhaust side. Adjust valves on No. 3 cylin-der.
Number 3 piston at TDC:
FE€LER GAUGE
"UP- MARKS
6-58
7. Rotate the crankshaft '180. counterclockwise tobring No. 4 piston to TDC. The ,,Up,. mark shouldbe pointing straight down. Adjust valves on No. 4cylinder.
Number 4 piston at TDC:
8, Rotate the crankshaft 180. counterclockwise tobring No. 2 piston to TDC. The "Up., marks shouldbe on the intake side. Adjust valves on No. 2 cylin_der.
Number 2 piston at TDC:
L

Cylinder Head
lllustrated Index (cont'dl
CYLINDER HEADBOLTS11 x 1.5 mm83 N.m {8.5 kg{.m, 61Apply engine oilto threads.
INTAKE VALVE SPRING INNER
VALVE KEEPERS
SPRING RETAINER
INTAKE VAI.VE SPRING OUTER
valvEKEEPEBS\:""j"*'
SPRING RETAINER
EXHAUST VALVESPRING
VALVE SEALReplace.
VALVE
LOST MOTIONASSEMBLY
EXHAUST VAL
VALVE SEALReplace.
SPRING SEAT
VALVE GUIDE
INTAKE VALVE
ROCKER SHAFT
SEALING AOLTS.20 mm64 N.m (6.5 kgt.m, 47 tbf.ft)
t
il
HEAO OIL CONTROLORIFICEClea n.
a
6-66

WATER BYPASS
HOSE
14. Remove the upper radiator hose, heater hose and
water bvpass hose.
HEATER
Remove the engine wire harness connectors and wlre
harness clamps from the cylinder head and the intake
manifold.
Four fuel injector connector
Engine coolant temperature (ECT) sensor connec-
tor
ECT gauge sending unit connector
ECT switch connector
ldle air control (lAC) valve connector
Manifold absolute pressure (MAP) sensor connec-
tor
Throttle position sensor connector
Primary Heated oxygen sensor (Primary HO2S)
connecror
VTEC solenoid valve connector
15.
a
a
a
a
a
\
16.
17.
Remove the spark plug caps and distributor form
the cylinder head.
Remove the upper bracket.
NOTE:
. Use a jack to support the engine before removing
the upp€r bracket is removed.
. Place a cushion between the oil panandthejack.
12 x 1.25 fin74 N.m 17.5 kgtm,
UPPER BRACKET
18. Remove the cylinder head cover.
{cont'd)
6-69

Rocker Arms
Removal
'1. Hold the rocker arms together with a rubber band to
prevent them from separating.
Remove the intake and exhaust rocker shaft oil con-
trol orifices, then remove the VTEC solenoid valve
and the sealing bolts.
NOTE: The shapes ofthe intake and exhaust oil con-
trol orifices are different, ldentify the parts as they
are removed to ensure reinstallation in the original
locauons.
2.
EXHAUST ROCKERSHAFT ORIFICE
INTAKE ROCKERORIFIGEClean.Clean.
O.RINGO.RINGReplace.
RUEBER BAND
Replace. _ (lX
-dJ'v-l- \
6-71
3. Screw 12 mm bolts into the rocker arm shafts.
Remove each rocker arm set while slowly pulling
out the intake and exhaust rocker arm shafts.
12 mm BOLTS
ROCKER ARM SHAFTS

Valve Seats
Reconditioning
1. Renew the valve seats in the cylinder
valve seat cutter.
NOTE: lf any guides are worn (see
replace them (see page 6-80) before
valve seats,
head with a
page 6-79),
cutting the
Carefully cut a 45o seat, removing only enough mate-
rial to ensure a smooth and concentric seat.
Bevel the upper edge of the seat with the 30" cutterand the lower edge of the seat with the 60. cutter.Check width of seat and adjust accordingly,
Make one more very light pass with the 45" cutter toremove any possible burrs caused bv the other cut-
ters.
Valve Seat Width:
Standard (Newl: 1.25 - 1.55 mm {0.0't9 - 0.061 in)Service Limii: 2.0 mm 10,08 inl
Sear Widrh
6-78
5. After resufacing the seat. inspect for even valveseating: Apply Prussian Blue Compound to thevalve face, and insert the valve in its original loca-tion in the head. then lift it and snap it closedagainst the seat several times.
PRUSSIAN BLUE COMPOUND
The actual valve seating surface, as shown by theblue compound, should be centered on the seat.. lf it is too high (closer to the valve stem), you mustmake a second cut with the 60. cutter to move itdown, then one more cut with the 45. cutter torestore seat width.
. lf it is too low (closer to the valve edge), you must
make a second cut with the 30. cutter to move itup. then one more cut with the 45. cutter to restoreseat width.
NOTE: The final cut should always be made withthe 45" cutter,
7. Insen the intake and exhaust valves in the head and
measure valve stem installed heioht.
Intaka Valve Stem Installed Height:
Standsrd lNaw): 37.465 - 37.935 mm(1./P50 - r.4935 inl
Sorvice Limit: 38.185 mm 0.5033 in)
Exhau3t Valv€ Stem Installed Height:
Standard (New): 37.165 - 37.6i|5 mm(1.46:t2 - 1.i1817 inl
Servico Limit 37.885 (1.4915 inl
lf valve stem installed height is over the service limit,replace the valve and recheck. lf it is still over the ser-vice limit, replace the cylinder head; the valve seat inthe h6ad is too deep.
(

7. Apply a thin coat of clean engine oil to the outside
of the new valve guide. Install the guide from the
camshaft side of the head; use the special tool to
drive the guide in to the specified installed height. lf
you have all l6 guides to do, you may have to reheat
the head,
VALVE GUIDE DRIVER,5.5 mm077i12 - (x)l01(x)
tr A\
Valve Guide Installed Hoight:
lntake: 12.55 - 13.05 mm {0.,194 - 0.514 in)
Exhaust: 12.55 - 13.05 mm 10.494 - 0.51'l in)
VALVE GUIDE
\
Reaming
NOTE: For new valve guides onlY.
1. Coat both reamer and valve guide with cufting oil.
2. Rotate the reamer clockwise the full length of the
valve guide bore.
Continue to rotate the reamer clockwise while
removing it from the bore
Thoroughly wash the guide in detergent and water
to remove any cutting residue.
Check clearance with a valve lsee page 6-73)
. Verify that the valve slides in the intake and
exhaust valve guides without exertlng pressure.
REAMER HANDLE
Turn r6amer in
clockwise direction
a
VALVE GUIOE REAMER. 5.5 mm
OTHAH - PJTO1IIB
6-81

Valves
1.
Installation
Coat the valve stems with oil. lnsert the valves into
the valve guides.
NOTE: Check that the valves move up and downsmoothly.
Installthe spring seats on the cylinder head.
Install the valve seals using the special tool.
NOTE: Exhaust and intake valve seals are not inter-
changeable.
WHITESPRING
VALVE GUIDE SEAL INSTALLERKD-28)g (Commercially available)NOTE: Use small lDend of tool,
2.
BRACKSPRING
VALVE SEALReplace.
tNsTALLERVALVE GUIDE SEALKD-2899NOTE: Use small lDend of tool
(
4. lnstall the valve spring and valve retainer, theninstall the valve spring compressor. Compress thespring, and install the valve keepers.
NOTE: Place the end of the valve spring with closely
wound coils toward the cylinder head.
VALVE SpRtNG VALVE SPRTNG
COMpRESSOR COMPRESSORATTACHMENT
ATTACHMENT EXTENSTON
0775? _ pJlOl0A o?MAF - PR9010A
VALVE SPRING COMPRESSORlCommercially available)Snap-on CF711 or KD-3tXlwith #32JAWSLightly tap the end of each valve stem two or threetimes with the wooden handle of a hammer to ensureproper seating of the valve and valve keepers.
NOTE: Tap the valve stem only along its axis soyou do not bend the stem.
I
5.

Rocker Arms
lnstallation
1.
2.
3.
lnstall the rocker arms in the reverse order of
removal:
. Valve adjusting locknuts should be loosened and
the adiusting screw, backed off before installa-
tron.
. The component parts must be reinstalled in the
original locations.
lnstall the lost motion assemblies.
lnstall the rocker arms while inserting the rocker
arm shaft into the cylinder head
NOTE: Remove the rubber band after installing the
rocker arms.
12 mm BOLT
\
6-83
4. Clean and install the rocker shaft orifices with new
O-rings. lf the holes in the rocker arm shaft and
cylinder head are not in line with each other, screw
a 12 mm bolt into the rocker arm shaft and rotate
the shaft.
NOTE: The shapes of the rocker shaft orifices tor
the intake and exhaust are different. The orific'
must be installed in the proper locations.
INTAKE ROCKER
SHAFT ORIFICE
EXHAUST ROCKER Clean
SHAFT ORIFICE
O.RING
O