ACURA INTEGRA 1998 Service Manual Online

Gylinder Head
Removallcont'd)
19. Remove the side engine mount.
10 x 1.25 mm52 N.m {5.3 kgt:m, 38 lbl.ft}
20. Remove the cylinder head cover.
SIDE ENGINEMOUNT
12 x 1.25 mm74 N.m 17.5 kgt.m,sil lbtft)
CYLINOER HEADCOVER
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L21.
22.
Remove the timing belt (see page 6- 10).
Remove the camshaft pulleys and back cover.
CAMSHAFTPULLEYS
23. Remove the exhaust manifold.
GASKETReplace.
SELF.LOCKING NUT8 x 1.25 mm3'l N.m 13.2 kgl.m, 23 lbf.ftlReplace.

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Valves, Valve Springs
and Valve Seals
Removal
NOTE: ldentify valves and valve springs as they areremoved so that each item can be reinstalled in its origi-nal position.
1. Tap e€ch valve stem with a plastic mallet to loosen
valve keepers before installing the spring compres-sor.
Install the spring compressor. Compress spring andremove valve keeper.
VALVE SPRING COMPRESSORKD No.383, with #35 JAW orSnap-on CF711
Measure cam Iobe height.
Cam Lobe Height Standard (Newl
fNTAKE: 33.716 mm 11.3271inl
EXHAUST: 33.528 mm (1.3200 inl
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VALVE SPRING COMPRESSORATTACHMENT07757 - PJ1010A
Inspect this area for wear.
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6-23

Valves, Valve Springs and Valve Seals
Removal (cont'dl
3. Installthe special tool as shown
VALVE GUIDE SEAL REMOVERCOMMERCIALLY AVAILABLELISLE P/N 57900 or KD3350
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4. Remove the valve seal.
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lntaks valve Dimsnsions
A Standard (Newl: 30.90 - 31.10 mm
B Standard (New):
C Standard {New):
C Sorvice Limit:
D Standard (Now):
D Service Limil:
B Standard (New):
C Standard {N6w}:
C Service Limit:
D Standsrd lNow):
D Servic€ Limit:
11-217 - 1.221inl
103.80 - 104.10 mm
14.087 - 4.098 in)
6.580 - 6.590 mm(0.2591 - 0.2594 in)
6.55 mm (0.258 inl
1.35 - 1.65 mm(0.053 - 0.065 in)'1.15 mm (0.0'15 inl
Exhaust Vslve Dimonsions
A Standard lNew): 27.90 - 28.10 mm\
11.098 - 1.106 in)
1O4.OO - 10,1.30 mm
l,[.09/t - 4.106 in)
5.550 - 6.560 mm
10.2579 - 0.2583 in)
6.52 mm (0.257 inl
1.65 - 1.95 mm
(0.065 - 0.077 in)
1.45 mm (0.057 in)

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Installation Sequence
Exhaust and intake valve seals are NOT interchanoeable.
NOTE: Place the end of valvespring with closely wound coilstoward the cylinder head.
EXHAUST VALVE SEALIBLACK SPRING}Replace.
@A..'..--uoruEKEEPER'
9-...-'PRTNGREYATNER
VALVE SPRING
INTAKE VALVE SEALIWHITE SPRINGIReplace.
I
PLASTIC MALLET
VALVE GUIDESEAL INSTALLER07GAD - PH70100
,@.t.'( (Sz) I<-- SPRING
V SEAT
NOTE: lnstall the valve spring seatsbefore installing the valve seals.
6-25

Valve Installation'alve Inslallauon -
When installing valves in the cylinder head, coat
valve stems with oil belore inserting them 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 valves and valve keepers (use plas
tic mallet).
NOTE: Tap the valve stem only along lts axrs so you
do not bend the stem.
PLASTIC MALLET
Valves, Valve Springs and
Valve SealsValve
Valve
Guides
Movement
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L
valve tvtovemenr -
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 Stem-to-Guide Clearance:
Standard {Newlr 0.04 - 0.10 mm
10.002 - 0.004 in)
Service Limit: 0.16 mm {0.005 in)
Exhaust Valve Stem-to-Guide Clearance:
Standard {New}: 0.10 - 0.16 mm
(0.004 - 0.006 inl
Service Limit: 0.22 mm (0.009 in)
Valve extended 10 mm out from seat
lf measurement exceeds the service limit, recheck
usrng 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.
NOTEr 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. o{ the valve
guide, measured with an inside micrometer or ball
ga uge.
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 Stem-to-Guide Clearance:
Standard (Newl: 0.02 - 0.05 mm
10.001-{.002 inl
Service Limit: 0,08 mm (0.003 in)
Exhaust Valve Stem-to-Guide Clearance:
Standard (New): 0.05 - 0.08 mm
{0.002 - 0.003 in)
Service Limit: 0.11 mm {0.004 in)\

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Replacement
1. As illustrated below use a commercially available
air-impact valve guide driver attachment modified
to fit the diameter of the valve guides, In most
cases, the same procedure can be done using thespecial tool and a conventional hammer.
6.il mm{0.25 inl
rr
*f-::rtl1-r87 mm{3.43 in)11.3 mm10.44 inl
orVALVE GUIDE DBIVER, 6.6 mm07942 - 6570100
Select the proper replacement guides and chillthem in the freezer section of a refrigerator forabout an hour.
Use a hot plate or oven to evenly heat the cylinderhead to 300"F (150"C). Monitor the temperature witha cooking thermometer.
CAUTION:
. Do not use a torch; it may warp the hoad.. Do not ger tho head hotter than 300.F ltS0"C);exces3ive heat may loo3en the valvo seats.. To avoid burns, uss heaw gloves when handlingthe heat€d cylinder head.
12.21inl
6-27
Working trom the camshaft side, use the driver and8n air hammer to drive the guide about 2 mm (0.1
in) towards the combustion chamber. This willknock off some of the carbon and make removaleaster.
CAUTION:
. Always wear safety goggles or a face shieldwhen driving valve guides.
. Hold the air hammer direcfly in line with thevalve guide to prevent damaging the driver.
Turn the head over and drive the guide out towardthe camshaft side of head.
5.
VALVE GUIDE DRIVER.079i12 - 65701006.6 mm
lf a valve guide still won't move. drill it out with a
8.0 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 guide{s) from the freezer, one at atime, as you need them.
{cont'd)
OO
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Valve Seats
Reconditioning
ACTUALSEATINGSURFACE
VALVESEAT
Renew the valve seats in the cylinder head using avalve seat cutter.
NOTE: lf guides are worn (see page 6-26), replace
them {see page 6-27) before cutting the valve seats.
Carefully cut a 45" seat, removing only enoughmaterial 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 45o cutter toremove any possible burrs caused by the other cut-rers.
V8lv6 S€at Width (lntake and Exhaustl:
Standard {New}: 1.25 - 1.55 mm {0.0/t{, - 0.061 in}
S€rvice Limit: 2.0 mm 10.08 in)
After resurfacing the seat, inspect for even valveseating: Apply Prussian Blue compound to the valveface. Insert the valve in its original location in thehead, then lift it and snap it closed against the seatseveral times.
PRUSSIAN BLUE COMPOUNO
6-29
o.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
must make a second cut with the 60" cutter tomove it down, then one more cut with the 45"
cutter to restore seat width.
lf it is too low (closer to the valve edge), you
must make a second cut with the 30. cutter tomove at up, then one more cut with the 45. cutterto restore seat width.
NOTE: The final cut should always be made with
the 45" cutter.
Insert intake and exhaust valves in the head andmeasure valve stem installed height.
Intake Valve Stem Inst8lled Height:
Standard lN6wl: 40.765 - i11.235 mm(1.6049 - 1.6234 in)
Servico Limiti i01.,|85 mm (1.6333 in)
Exhaust Valv€ Stem Installed Height:
Standard {Newl: ,[2.765 - 4:1.235 mm
1.
{1.68i}7 - 1.7022 inl,(1.485 mm 11.7120 inlService Limit:
I_1I
VALVE STEMINSTAI-LED HEIGHT
8.lf valve stem installed height is over the servicelimit, replace valve and recheck. lf still over the ser-vice limit, replace cylinder head; the valve seat in
the head is too deep.