Valve ACURA INTEGRA 1994 Service Owner's Manual

I
Replacement
1. As illustrated in the removal steps of this proce-
dure, use a commercially-available air-impact driv-
er attachment modified to fit the diameter of the
valve guides. In most cases. tho same procedure
can be done using the Valve Guide Driver and a
conventional hammer.
COMMERCIALLY AVAILABI,I
VALVE GUIDE DRIVER
RGmov.l rnd In3tlllationVALVE GUIDE DRIVER, 6.6 mm
0?942 - 6570100
Select the proper replacement guides and chill
them in the freezer section of a refrigerator for
about an hour.
Use a hot plate or oven to evenly heat the cylinder
head to 300'F (150'Cl. Monitor the temperature with
a cooking thermometer.
CAUTION:
. Do not use a torch; it may warP the hgad.
. Do not get ths head hottq than 3OO'F 1150"C);
excessive hgat may loos€n thG valvs soat3.
. To avoid burns, usa hoavy glov93 whon handling
the heated cylinder hoad.
-----T_-
lrl
11.3 mmlo.il,l in)
f sz --| 12.21i^l
6-25
4.Working from the camshaft side. use the driver and
an air hammer to drive the guide about 2 mm {0.1
in) towards the combustion chamber. This will
knock oft some of the carbon and make removal
eaSrer.
GAUTIOiI:
o Alwrys woar safety goggles or a face shiold
wh6n using tho Eir hammer.
. Hold ths air hammsr directly in lins with the
vrlvr guidc to prsvont damaging tho drivor.
Turn the head over and drive the guide out towatd
the camshaft side of head.
lf a valve guide still won't move, drill it out with a 8
mm (5/16 in) bit, then try again.
CAUTION: Drill guid$ only in oxtremo cases: You
could drmrgo tho cylinder hosd if ths guido br"akr.
VALVE GUIDE DRIVER,6.6 mm
07942 - 65701q)
Remove the new guide{s} from the refrigerator, one
at a time, as you need them.
{cont'd)
OO ",
O (V /rl -1-- ) o

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.

Install the intake manifold and tighten the nuls in a
c.isscross pattern in 2 or 3 steps, beginning with the
inner nuts.
CAUTION: Check to. fold3 or 3cratchc! on ihc aur-
taco ol tho ga3kot. Roplscs with a nlw gaeket if
damagod.
Tighten the intake manifold bracket bolts.
GASXETReplace.
E x 1.25 mm 8 x 1,25 mm2ir N.m l2.it kg{.m, 23 N.m 12.3 kgf.m.17 tbf.ftl 17 tbl.frt
Install the exhaust manifold and tighten the new
self-locking nuts in a crisscross pattern in 2 or 3
steps, beginning with the inner nuts.
. Use new self-lockiflg nuts.
4.
5.
8 x 1.25 mm24 N.m (2,a kgf.m,
SELF.LOCKING NUT8 x 1.25 mm31 N.m (3.2 kgt m,23lbfftlEXHAUST11Replace.
l0 x 1.25 mma,t N.m 14.5 kgf.m,33 tbt.ft)
GASKEIReplace.
8 x 1.25 mm2il N.m 12.4 kg{.m,17 rbtftl
m
CAUTION:
. Mlka 3uro thrt thc k.ywlyr on tho c.mthlttr lrc
facing up .nd No. I pi3ton i3 8t top d.rd clnt.r(TDCt.
. Rcphct th! rocksr armr in thsir o.iginal potltlom.
6, Place the rocker arms on the oivot bolts and ths
valve stems.
lnstallths camshafts, then installth€ camshaft sosls
with ths open side (spring) facing in.
Apply liquid gasket around the rubber cap, then
installthe rubber cao.
7.
8.
(cont'd)
6-29

Cylinder Head
Installation (cont'dl
9. Apply liquid gasket to the head mating surtaces of
the No. 1 and No. 6 camshaft holders, then install
them, along with No. 2,3, 4, and 5.
NOTE:
o "1" or "E" marks are stamoed on the camshaft
holders.
. Do not apply oil to the holder mating surface of
camshaft seals.
. Apply liquid gasket to the shaded areas.
. The arrows marked on the camshatt holders
should point to the timing belt.
No.6 No.5No.2 No. 1
10. Tighten the camshaft holders temporarily.
. Make sure that the rocker arms are properly
positioned on the valve stems.
INTAKE CAMSHAFT HOLDERS
11. Tighten each bolt in two steps to ensure that the
rockers do not bind on the valves.
6r1.0mm9.8 N.m 11.0 kgf.m,7.2lbtft)
Install keys into camshaft grooves.
NOTE: To set the camshafts at TDC position for No.
1 piston, align the holes in the camshafts with the
holes in No. 1 camshaft holders and insert 5.0 mm
pin punches in the holes.
I r 1.25 mm37 N.m {3.8 kgf.m, 27 lbf.ttl
6x1.0mm9.8 N.m (1.0 kgf.m,7.2 tbtft)
Push camshaft pulleys onto camshafts, then tighten
the retaining bolts to the torque specified.
KEYS
13.
tfitml

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

SpecialTools
Tool NumbarDctcriptionPlea Rctllanca
6-72
6-17
&45
6-43
6-11
6-67
6-71,72
6-67
Valve Guide Reamer, 5.5 mm
Holder Handle
Tappet Adiuster Wrench
Air Stoppet
Pulley Holder Attachment, HEX 50 mm,
Offset
Valv€ Spring Compressor Attachment
Extension
Valve Guide Driver, 5.5 mm
Valve Spring Compressor Attachment
07HAH - PJ7010A or
OTHAH _ PJTOIOB
07JAB - 001020A
07LAA - PR30100
OTLAJ _ PR3O2OA
07MAB. PY3OlOA
OTMAF _ PRgO'IOA
07742 - 0010100
07757 - PJ 1010A
o
@
@
@
/.\
o
o
@
o@
@o@
o@@
6-34

VTEC
Troubleshooting FlowchartVTEC Pressure Switch (cont'dl
lFrom pag6 6-39)
Disconnsct lhe 1P connectortrom the VTEC sol6noid valve.
Attach the battery positivo torminal to the GRN/WHT terminal.
Start the engine and chgck oilpressure at 5,000 rpm (lor VTECoil pr€ssure test).
ls pressure above 400 kPa(4kgt/cm,, 60 psi)?In.p.ct th. VIEC .olrnoid v.lv..
Check tor continuity betwe6n the2 terminsls on th€ VTEC prsssure
switch !nder above condition.
Sub.titut. . klown-eood ECMand rachack. |f aymplom/indica-tion goaa away rrplaca th. o?igi-n.l ECM.
u
OOMMERCIALLY AVAILABIIOIL PRESSURE GAUGE
GAUGE JOIMf ADAPIORSNAPON MT2S1'10x 1.0 mm. Use new washer wheninstalling th6 soaling bolt.NOTE:Keep moasuring tim6 as shon 6s possi-
ble because engine i5 running with noload lless than ono minuto).

WEC Solenoid Valve Inspection
Disconnect the 1P connector trom the VTEC
solenoid valve.
M€asurs resistance between th€ terminal 8nd body
grouno.
R.3bt!nc!: 1l - 30 O
lf the resistance is within specificstions, romove the
WEC sol€noid valve from the cvlindor hsad, and
check the VTEC solenoid valve filter for clogging.
. lf there is clogging, replacs the engin€ oil filter
and the engine oil.
VTEC SOT.CNOTD
12 tTln 11.2 kg[.m,8.7 lbttt]
6-41
4. lf th6 filter is not clogged, push the VTEC solenoid
valv€ with your finger and check its movement.
. lf VTEC solsnoid valve is normal, check the
engins oil pr€ssure.
6x1.0mm