Page 98 HONDA INTEGRA 1994 4.G Owner's Manual

Gylinder Head
Removal
I
t
Engine removal is not required for this procedure.
CAUTION: To avoid damaging tho cylinder head, wait
until tho ongino coolant temporature drops bolow 100"F
{38"C) beforo loo36ning the rotainin0 bolts.
NOTE:
. Inspect the timing belt before removing the cylinder
neao.
. Turn the crankshaft pulley so that the No. 1 piston is
at top dead center (TDCI (page 6-12).
. Mark all emissions hoses before disconnecting them.. Anti-theft radios have a coded theft protection circuit.
Be sure to get the customer's code number before.- Disconnecting the battery.- Removing the No. 32 (7.5 A) fuse irom the under-
hood fuse/relay box.- Removing the radio.
After service, reconnect oower to the radio and turn it
on.
When the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.
1. Disconnect the negative terminalfrom the battery.
2. Drain the engine coolant (see page 10-5).
. Remove the radiator cap to speed draining.
3. Relieve fuel pressure (see Section 1 1).
@ Do not smoke whils working on tusl
systom, keep opon flame or spark away trom work
area. Drain fuol only inlo an approvod containsr.
4. Disconnect the fuel feed hose.
SERVIC€ BOLT
WASHERSReplace.
5, Remove the intake air duct.
Remove the breather
evaporative emission
hose, water bypass hose and(EVAP) control canister hose.

Cylinder Head
Removal (cont'dlI
12.R€move the spark plug caps and distributor from
the cvlinder head.
Remove the upper radiator hose, heater hose and
water bypass hose.
UPPER RAI'IAYOR
14. Remove th6 solash shield.
WATER BYPASS
9.8 N.m {1.0 kgt m.t.2 tbr.frt
sHtEut
15. Remove the engine ground cable.
Remove the adjusting bolt and mounting bolts, then
remove the power steering (P/S) pump belt 8nd P/S
pump.
. Do not disconnect the P/S hoses.
6x1.0mmADJUSTINGBOLT9.8 N.m 11.0 tgfm,7.2 tbf.ftl
8 x 1.25 mm24 .m (2.akstm, 17lbf.ftl
P/S PUMP
Remov€ the air conditioning (Ay'Cl compressor(see pags 6-10).
R€move the alternator belt (see page 6-10).
Ramove the cruise control actuator.
8 x 1.25 mm2a N.m 12.4 kgt m,
belt
17.
t8
ACTUATOR

52 N.m (5.3 kgt'm, 38 lbf'ft)
19. Remove the side engine mount.
10 x 1.25 mm
20. Remove the cylinder head cover.
WASHERS
SIDE ENGINEMOUNT
12 x 1.25 mm74 N.m {7.5 kgf.m,5{ rbtftl
CYLINDEB HEAD
Remove the timing belt (see page 6-10).
Remove the camshaft pulleys and back cover.
23. Remove the exhaust manifold.
SELF.LOOKING NUT8 x 1.25 mm
BACK COVER
BRACKET
(cont'd)
6-19

!
1.
2.
Camshafts
Inspection
Loosen the adjusting screws.
Remove the camshaft holders and the rocker arms
NOTE: Mark the rocker arms before removing
them.
Reinstall the camshaft and holders. Tighten the
camshaft holder bolts in a crisscross pattern, begin-
ning with the inner bolts.
9.8 N.m (1.0 kgf.m,7.2 lbf.ft)
Seat the camshafts by pushing them toward the dis-
tributor end of the head with a screwdriver.
Zero the dial indicator against the end of the
camshaft. push the camshaft back and forth and
read the end play.
Camshalt End Play:
St.ndard lNow): 0.05 - 0.15 mm
(0.002 - 0.006 inl
Seivice Limit: 0.5 mm {0,02 in)
Remove the camshaft holder bolts from the cylinder
head.
NOTE: Unscrew the camshaft holder bolts two
turns at a time, in a crisscross pattern.
Lift the camshafts out ot the cylinder head. wipe
them clean, then inspect the lift ramps. Replace the
camshaft if any lobes are pitted, scored, or exces-
srvely worm
Clean the camshaft journal surfaces in the cylinder
head, then set the camshaft back in place. Insert a
plastigage strip across each iournal.
Install the camshaft holders and torque the bolts to
the values and in the sequence shown on page 6-30.
NOTE: Do not rotate camshafts during inspection.
-
6-21
10.Remove the camshaft holders. Measure the widest
ponion of plastigage on each journa..
Camshaft-to Holder Oil Clearance:
Standard lNewl: 0.039 - 0.069 mm(0.0015 - 0.0027 in)
Sarvico Limit 0.15 mm {0.006 inl
11. lf camshaft-to-holder oil clearance is out of toler
ance:
. And the camshaft has already been replaced,
vou must replace the cylinder head.
. lf the camshaft has not been replaced, first check
total runout with the camshaft supported on V-
blocks.
Clmshaft Total Runout:
StEndard {New): 0.03 mm (0.001 inl max'
Servico Limit: o.Oil mm {0.002 inl
- lf the total runout of the camshafts is within tol-
erance, replace the cylinder head.
- lf the total runout is out of tolerance, replace the
camshafts and recheck. lf the oil clearance is still
out of tolerance. replace the cylinder head.
PLASTIGAGE

Valve Guides
Replacement {cont'd}
7. SliD a 6.5 mm {0.25 in) stsel washor and the correct
driver attachment over the end of the driver {The
washer will absorb some of the impact and extend
the life of the driver).
.,F-q-re
tt-T-IIttlDRVEn 6,5 mm t0.25 in) ATTACHMENT
WASHER
8, Install the new guide(s) from the camshaft side of
the head; drive each one in until the attachment
bottoms on the head. lf you have 8ll sixteen guides
to do, vou may have to reheat the head one or two
more I|mes.
Valv6 Guida Instsllod Hcight:
lntaks: 13.75 - 14.25 mm
(o.sal - 0.561 inl
Exhru3t: 15.75 - 16.25 mm
{0.620 - 0.640 in}
Reaming
NOTE: For new valve guides only.
Coat both reamer and valve guide with cutting oil.
Rotate the reamer clockwise the full length of the
valve guide bore.
Continue to rotate the reamet 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 (see page 6-24).
. Verify that the valve slides in the intake 8nd
exhaust valve guides without ex€rting pressure.
VALVE GUII'E REAMER, 6.6 MM
079E4 - 667ot0c
REAMER HANDLE
s

Valve Seats
ACTUALSEATINGSUBFACE
VALVESEAT
PRUSSIAN
Reconditioning
1. Renew the valve seats in the cylinder head using a
valve seat cutter.
NOTE: lf guides are worn (see page 6-24), replace
them (see page 6-251 before cutting the valve seats,
2. Carefully cut a 45' seat, removing only enough
material to ensure a smooth and concentric seat.
3. Bevel the upper edge of the seat with the 30o cutter
and the lower edge of the seat with the 60' cutter.
Check width of seat and adjust accordingly.
4. Make one more very light pass with the 45" cutter to
remove any possible burrs caused by the other cut-
ters.
Valvo Seat Width llntake and Exhaustl:
Standard: 1.25 - 1.55 mm {0.049 - 0.061 inl
Servics Limit:2.0 mm 10.08 inl
SEATWIDTH
After resurfacing the seat, inspect for even valve
seating: Apply Prussian Blue compound to the valve
face, and insert valve in original location in the
head, then lift it and snap it closed against the seat
severaltimes.
!
6-27
7.
The actual valve seating surface, as shown by the
blue compound, should be centered on the seat.
. lf it is too high (closer to the valve stem), you
must make a second cut with the 60" cutter to
move it down, then one more cut with the 45'
cutter to restore seat width.
. lf it is too low (closer to the valve edgel, you
must make a second cut with the 30' cutter to
move it up, then one more cut with the 45" cutter
to restore seat width.
NOTE: The final cut should always be made with
the 45' cutter.
Insert intake and exhaust valves in the head and
measure valve stem installed height
Intako Valve Stem Install€d Height:
Standard (New): /$.765 - '11.235 mm
{1.604It - 1.6234 in}
Service Limit: ill.il85 mm (1.6:133 inl
Exhaust Valvo Stem lnstalled Height:
Standard {Newl: ,12.765 - i|:|.235 mm
11.6a37 - 1.1022 in1
Service Limit /B.il85 mm (1.7120 inl
lf valve stem installed height is over the service
limit, reDlace valve and recheck. lf still over the ser-
vice limit, replace cylinder head; the valve seat in
the head is too deeo.
8.

t
Gylinder Head
Installation
Installthe cylinder head in the reverse order of removal:
NOTE:
. Always use a new head gasket.
. Cylinder head and cylinder block surface must be
ctean.
. "UP" mark on the timing belt pulleys should be at the
top.
. Do not use the middle cover and lower cover for stor-
ing items disassembled.
. Clean the middle cover and lower cover before instal-
lation.
. Replace the washer when damaged or deteriorated.'1. Cylinder head dowel pins and the oil control orifice
must be aligned,
NOTE:
. When handling a metal gasket, care should be
taken not to told it or damage the contact surface
of the gasket.
. Clean the oil control orifice when installing.
CYLINDER HEAD GASKET
{3 LAYERS OF METALIReplace.
OOWEL PINSorl coNtnolORIFICEClean.
O.RINGReplace.
Tighten the cylinder head bolts in two steps. In the
Jirst step tighten all bolts, in sequence, to about 29
N.m {3.0 kgf.m, 22 lbl.ltJ; in the final step, tighten in
the same sequence to 83 N.m (8.5 kgf.m, 61 lbf'ft).
NOTE:
. Apply engine oil to the cylinder head bolts and
the washers.
. Use the longer bolts at positions No. 1 and No. 2
as shown.
CYLINDER HEAD BOLTS TOROUE SEOUENCE
@o@@@
NOTE: lf camshaft-to-holder oil clearances (see page 6-
21) are not within specitication, the head cannot be
resurfaced.
lf camshaft'to-holder oil clearances are within specifica-
tions, check the head for warpage.
lf warpage is less than 0.05 mm (0.002 in) cylinder
head resurtacing is not required.
lf warpage is between 0.05 mm (0.002 in) and 0.2 mm
(0.008 in), resurface cylinder head.
Maximum resurface limit is 0.2 mm (0.008 in) based
on a height of 132.0 mm (5.20 in).
Measure along edges, and 3 ways across center.
Cylinder Hoad Height:
Standard (New): 131.95 - 132.05 mm
{5.195 - 5.191t in}
PRECISION STRAIGHT EOGE
Put longer bolts here.

14.
16.
Installthe timing belt {see page 6-12).
Adjust the valve clea.ance (see page 6-31.
Install the rubber seal in the groove of the cylinder
head cover. Seat the seal in the recesses for thg
camshaft first, th€n work it into the groove around
the outside edges,
NOTE:
. Before installing the rubber seal, thoroughly
clean the seal and the groove.
. When installing, make sure the seal is seated
securely in the corners of the recass€s with no
gap.
CYUNDER HEADCOVER
RUBAER SEAL
17.Apply liquid gask€t to the rubber seal at the eight
corners of the recesses.
NOTE:
. Use liquid gaskst, Part No. 08718 - 0001.
. Check that the mating surfaces are cl€an and dry
before applying liquid gasket.
. Do not install the parts if 20 minutes or mor6
havs elapsod sinco applying liquid gasket.
Instead, reapply liquid gasket after removing old
reaidue.
. After assembly, wait at lsast 20 minutes before
filling the engine with oil.
Apply liquid g.sket tothe shaded areas.
(cont'd)
6-31

Cylinder Head/Valve Train
818C1 engine
Special Tools ............. 6-34
wEc
Troubleshooting Flowchart
WEC Solenoid Valve ................... 6-36
VTEC Pressure Switch ................. 6-38
VTEC Solenoid Valve Inspection .... 6-41
Rocker Arms
Manual Inspection .....,................. 6-42
Inspection Using Special
Tools ....................................,.....,.. 6-/|i|
Valve Glearance
Adiustment ............ 6-44
Timing Belt
lllustrated 1ndex ............................... 6-46
Inspection .............. 6-48
Tension Adiustment ........................ 6-48
Removal ................. 6-4{l
lnstallation ............. 6-51
Crankshaft Pulley Bolt
Replacement .........6-47
Cylinder Head
lllustrated Index ............................... 6-53
Removal .................6-55
Warpage ................6-74
lnstallation ............. 6-75
Rocker Arms
Removal ................. 6-60
Location ................. 6-61
lnspection .............. 6-62
Arm-to-Shaft G|earance .................. 6-63
Installation ............. 5-64
Camshafts
Inspection .............. 6-65
Valve Guides
Valve Movement .............................. 6-70
Replacement .........6-71
Reaming ................. 6-72
Valve Seals
Reconditioning ......6-73
Valves. Valve Springs and Valve Seals
Removal ................. 6-67
lnstallation Sequence ..........,.......,... 6-69
Valve lnstallation ............................. 6-70

VTEC
Ref€r to page 11-32 thru I l-39 beforo troubleshooting.
-g: -mi !5*3ij'i:,*o:",,XTl.Lamp
(MlL) indicates Disenostic rrouble code (Drc) 2r:A problem in the wEc
\,__-:-/ \.---l-l
Iel- -l 2,1 l-
MIL h.. b..n Fport d on.Wrth aaavica chack connac,tot
iomp.d, Codc 2l i. indic.t.d.
Oo tho ongino control module(ECM) Rg3ot Procgduro.
w6rrn up engine to normal op€r-ating tsmporature (the coolingfan comog on).
Do th€ Road Test.'
lmormitt.m t ilur., .yrtom i. OK!t thi.tim..Chacl tor poor connactiont otloo.. wircr !l VTEC .ol.noidv.lv. lnd ECM.
ls MIL on and does it indi-cato cod€ 21?
Turn tho ignition switch OFF.
Oisconnect tho 1P connsctorlrom the VTEC solenoid valvo.
Chock for continuity betw66n 1Pconn6clor terminal and body
9rcUnO.
ls there '14 - 30 07R.pl.c. th. VTEC rolonoid v.lvr,
' Road Test:Accelerate in 1st gear to 6n engino spood ovor 6000 rpm.Hold thst engine sp€ed tor at least two seconds.lflhe MIL do6s not coms on during th€ first road tost,reoeat this test two more tim95.
YES
(To pago G37l
6-36