1994 HONDA INTEGRA Valve clearance

Valves, Valve Springs and
Valve Seals
Valve lnstallation
When instaliing valves in the cylinder head, coat
valve stems with oil before insening them into valve
guides, and make sure valves move up and down
smoothlv.
When valves and springs are in place, lightly tap the
end of each valve stem two or three times to snsure
proper seating of valves and valve keepsrs (use plas-
tic mallet).
NOTE: Tap the valve stem only along its axis so you
do not bend the stem.
PLASNC MALI.IT
?ur
Valve Guides
Valve Movement
Measure the guide-to-stem clearance with a dial indica-
tor while rocking the stem in the direction of normal
thrust (wobble method).
lntake Valve Stsm-to-Guide Clearance:
Strndlrd (Newl: 0.0i1- 0.10 mm
(0.002 - 0.004 in)
Ssrvicc Limit: 0.16 mm {0.006 in)
Exhsust Valye Stom-to-Guide Clearance:
Standard {N€w): 0.10 - 0.16 mm
{0.0O'l - 0.006 in)
Slrvica Limit: 0.22 mm {0.000 in)
Valve extended 10 mm out from seat
lf measurement exceeds the service limit, recheck
using a new valve.
lf measurement is now within the service limit,
reassemble using a n€w valve.
lf measurement still exceeds limit, recheck using
alternate method below. then replace valve and
guide, if necessary.
NOTE: An alternate method of checking guide to stem
clearance is to subtract the O.D. of the valve stem, mea-
sured with a micrometer. from the l.D. of the valve
guide, measured with an inside micrometer or ball
gauge.
Take the measurements in three places along the valve
stem and three places inside the valve guide.
The diiference between the largest guide measurement
and the smallest stem measurement should not exceed
the service limit
lntake Valve Stom-to-Guide Clearance:
Standard (Newl: 0.02 - 0.05 mm(0.001-0.002 in)
Service Limit 0.08 mm (0.003 in)
Exhaust Valve Stom.to.Guid€ Clearanco:
Standard (Newl: 0.05 - 0.08 mm(0.002 - 0.003 inl
Srrvico Limit 0.ll mm 10.00't inl
6-24

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 Clearance
Adiustment
NOTE:
. Valves should be adjusted cold; at a cylinder head
temperature of less than 100"F (38'C).
. Adjustmsnt is the same for intake and exhaust
vatves.
o After adjusting, retorque the crankshaft pulloy bolt to
177 N.m ( 18.0 kgf.m, 130 lbf.ft).
1. Remove cylinder head cove..
ADJUSTING BOLT LOCANONS:
IMTAKE
No. 4 No.3 No. 2 No. 1
No.4 No.3 No.2 No. 1
EXHAUST
Set No. 1 piston at TDC. "UP" mark on the pulley
should be at top, and TDC grooves on the pulley
should align with the pointer on back cover. TDC
grooves (white paint) on the crankshatt pulley
should align with pointer on the timing belt lower
cover.
Numbr. 1 pirton .t TDC:
6-44
FOI{IER Ot{LOWEF COVERTDC MANKlP.int d whit.t
3.
4.
Diroction ofaotation.
Adjust valv6 clearanc6 on No. 1 cylinder.
Intlkc: 0.15 - 0.19 mm (0.006 - 0.0,07 inl
Exh.u3t 0.17 - 0.21 mm (0.007 - 0.m8 inl
Looson lh6 locknut and turn the adjusting screw
until feeler gaugo slides back and fonh with a slight
amount of drag.
TAPPET AI\,USTEN WREI{CI{O'LAA - PRIOIq'
7 x 0.75 mrn20 f+|n (2.0 kgf'm. 14lbtftl
FEEEN GAUGE

Tightsn the locknut and recheck clearance again.
Rep6at sdjustm6nt if necossary.
Rotsts tha crankshaft 180' counterclockwiss
(c8mshaft pulley turns 90'). The "UP" mark should
be on th€ sxhaust 8id6, Adiust vslves on No. 3 cylin-
oer,
Nurrb.r3tittondTDC:
FEEI.IR GAUGE
.UP' MANKS
7. Rotato crankshaft 180' countsrclockwise to bring
No.4 piston to TDC. The "UP" mark should bo
pointing straight down. Adjust valves on No. 4
cylinder.
Numb.r 4 pidon .t Tt C:
8, Rotate crankshaft 180" counterclockwis€ to bring
No. 2 piston to TDC. The "UP" marks should be on
the intaks sid6. Adjust valves on No. 2 cylinder.
Nonb.r 2 pirton .l TltC:
NOTE: Refer to page 6-78 when installing cylinder head
cover.
6-45

Valve lnstallation
When installing valves in cylinder head, coat valve
stems with oil before inserting into valve guides, and
make sure valves move up and down smoothly.
When valves and springs are in place, lightly tap the
end of each valve stem two or three times to ensure
proper seating of valve and valve keepers (use ham-
mer handle).
NOTE: Tap the valve stem only along its axis so you
do not bend the stem.
Valves, Valve Springs and
Valve SealsValve Guides
Valve Movement
Measure the guide-to-stem clearance with a dial indica-
tor while rocking the stem in the direction of normal
thrust (wobble method).
lntaks Valvr Stom-to-Guide Clearance:
Standard (Newl: 0.05 - 0.11 mm
{0.002 - 0.OO'l in)
Ssrvice Limit: 0.16 mm (0.006 in)
Exhaugt Vdve Stem-to-Guide Clsarancg:
Standald lNowl: 0.10 - 0.16 mm
(0.00'l - 0.006 in)
Sorvics Limit: 0.22 {0.0m in)
Valve extended 10 mm out from seat.
. lf measurement exceeds the service limit.
recheck using a new valve.
. lf measurement is now within the service limit,
reassemble using a new valve.
. lf measurement still exceeds limit, recheck using
alternate method below, then replace valve and
guide, if necessary.
NOTE: An alternate method ot checking guide to
stem clearance is to subtract the O.D. of the valve
stem. measured with a micrometer, from the l.D. ot
the valve guide, measured with an inside microme-
ter or ball gauge.
Take the measurements in three places along the
valve stem and three places inside the valve guide.
The difference between the largest guide measure'
ment and the smallest stem measurement should
not exceed the service limit.
lntafte Valvs Stom-to-Guida Clearance:
Stardard (Nowl: 0.025 - 0.055 mm(0.0010 - 0.0022 inl
Service Limit: 0.08 mm (0,003 in)
Exhaust Valvo Stem-to-Guide Clearance:
Standard lNew): 0.050 - 0.080 mm
10.0020 - 0.0031 in)
S€rvics Limit: 0.11 mm {0.0oil inl
6-70

Valve Guides
Replacement (cont'dl
7. Slip a 6 mm {0.2 in) steel washer and the correct
driver attachment over the end of the driver (The
washer will absorb some of the imDact and extendthe life of the driver).
:=:-/--PDRIVER6 mm 10.2 int ATTACHMENTWASHER
Install the new guide(s) from the camshaft side ofthe head; drive each one in until the attachment
bottoms on the head. lf you have all sixteen guides
to do, Vou may have to reheat the head one or twomore times.
Valve Guide Installed Height:
Intake: 12.55 - 13.05 mm {0.49it - 0.51it inl
Exhaust 12.55 - 13.05 mm {0.494 - 0.514 inl
VALVE GUIDE
Reaming
NOTE: For new valve guides only.
1. Coat both reamer and valve guide with cutting oil.
2, Rotate the reamer clockwise the full length of thevalve guide bore.
3. Continue to rotate the reamer clockwise whileremoving it from the bore.
4. Thoroughly wash the guide in detergent and waterto remove any cutting residue.
5. Check clearance with a valve (see page 6-70).
. Verify that the valve slides in the intake and ex-haust valve guides without exerting pressure.
REAMER HANDLE
Turn reamer inclockwise directiononry.
C'
o
a
-'{)
6-72

11.
12.
13.
Cylinder Head
Installation lcont'd)
lnstallthe timing belt lsee page 6-51).
Adjust the valve clearance (see page 6-44).
Install the rubber seal in the groove of the cylinder
head cover. Seat the seal in the recesses for the
camshaft first, then 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 seatedsecurely in the corners of the recesses with nogap.
COVER
6-78
14. Apply liquid gasket to the rubbe. seal at the eightcorne.s of the recesses.
NOTE:
. Use liquid gasket, Part No. 08718 - 0001.. Check that the mating surfaces are clean and dry
before applying liquid gasket.
a Do not install the parts if 20 minutes or more
have elapsed since applying liquid gasket.
Instead,.eapply liquid gasket after removing oldresidue.
r After assembly, wait at least 20 minutes beforefilling the engine with oil.
Apply liquid gasket tothe shaded areas.

lntake Air System
Throttle Body
Description
The throttle body is ot the single-barrel side-draft 1ype.
The lower portion of the throttle valve is heated by en-gine coolant from the cylinder head. The idle adjusting
screw which increases/dec.eases bvDass air and the
Evaporative Emission (EVAP) Control Canister port are
located on the top of the throttle body.
IOLE AOJUSTING
THROTTLESTOP SCREW(Non-adiustsb16l
11-120
Insoection
CAUTION: Do not adiust the thlottle stop screw. lt ispreset at the lactory.
1. Start the engine. Hold the engine at 3,OOO rpm with
no load (A/T in S or E position, M/T in neutral) until
the radiator fan comes on, then let it idle.
2. Disconnect the vacuum hose (to the EVAP control
canister) from the top of the throttle body; connect
a vacuum, gauge to the throttle body.
VACUUM PUMPGAUGEA973X-O41-XXXXX
5.
3. Allow the engine to idle and check that the gauge
indicates no vacuum.
a li there is vacuum, check the throttle cable (see
page 1 1-'l 18, 119).
Check that vacuum is indicated on the gauge when
the throttle is opened slightly from idle.
a lf the gauge indicates no vacuum, check the throt-
tle body port. lf the throttle body port is clogged.
clean it with carburetor cleaner.
Stop the engine and check that the throttle cable
operates smoothly without binding or sticking.
a lf there are any abnormalities in the above steps,
check for:
- Excessive wear or Dlav in the throttle valve shaft.
Sticky or binding throttle lever at full close po-
srtron.
Clearance between throttle stop screw and throt-
tle lever at tull close Dosition.