1997 HONDA CIVIC Face

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.
(

Cylinder HeadValve Guides
Warpage
NOTE: lf camshaft-to-holder oil clearances (see page 475)
are not within specification, 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 resurfacing 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 142 mm (5.59 in).
PRECISION STRAIGHT EDGE
Measure along edges, and three ways across center'
Cylinder Head Height:
Standard lNewl: 1i11.95 - 142.05 mm
15.589 - 5.593 in)
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 Stem-to-Guide Cl6arance:
Standard (Newl: 0.05 - 0.11 mm
(0.0020 - 0.0043 inl
Service Limit: 0.15 mm {0.0059 inl
Exhaust Valve Stem-to-Guide Clealance:
Standard lNewl: 0.10 - 0.16 mm
(0.0039 - 0.0063 inl
Service Limit: 0.24 {0.0094 in)
Valve extended 10 mm out from seat.
lf the measurement exceeds the service limit, recheck
using a new valve.
lf the measurement is now within the service limit.
reassemble using the new valve
lf the measurement still exceeds the limit. recheck using
the alternate method below. then replace the 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 difference between the largest guide measurement
and the smallest stem measurement should not exceed
the service limit.
lntake Valv€ Stem-to-Guide Clsarance:
Standard lNswl: 0.025 - 0.055 mm
10.0010 - 0.0022 inl
service Limit: 0.08 mm (0.003 in)
Exhaust Valve Stem-to Guide Cl€arance:
Standard {Newl: 0.050 - 0.080 mm
{0.0020 - 0.0031 inl
Service Limit 0.ll mm (0.004 in)
6-79

t
Valve Guides
Replacement
1. As illustrated below, use a commerciallv available
air-impact valve guide driver attachment modified
to fit the diameter of the valve guides. ln most
cases, the same procedure can be done using the
sDecial tool and a conventional hammer.
COMMERCIALLY AVAILABLEVALVE GUIDE DRIVER
87 mm -L- sz mm(3.43 inl I tz.zr int
rE-tt
10.8 mm10.42 inl
olVALVE GUIOE DRIVER,5.5 mm077,P - 0010100
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"C). Monitor the temperature with
a cooking thermometer.
CAUTION:
. Do not use a torch; it may warp tho head.. Do not get tho head hotter than 300"F {150"C};excesgive heat may loosen thg valve seats.. To avoid burns. use haaw gloves whon handling
the heatod cylinder head.
6-80
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 off
some ofthe carbon and make removaleasier.
CAUTION:
. Always wsar safety goggles or a face shield whsn
driving valve guides.
. Hold the air hammer dir€ctly in line with the
valve guide to prevont damaging thg dtiver.
Turn the head over and drive the guide out toward
the camshaft side of the head.
VALVE GUIOE DRIVER,5.5 mm077{2 - 0010100
lf a valve guide still won't move. drill it out with a8.0 mm (5/16 in) bit, then try again.
CAUTION: Drill guides only in extreme cases; you
could damago the cylinder head if ths guide br6aks.
Remove the new guide(s) from the freezer, one at a
time, as vou need them.
-:^-,65i^q
NNSp-<

5. lnstall the camshafts and camshaft oil seals.
NOTE:
. lnstallthe camshafts with the keyway facing up.
. lnstall the oil seal withthespring side facing in.
. The oil seal housing surface should be dry'
. Set the O-ring and dowel pin in the oil passage
of the No, 3 camshaft holder'
CAMSHAFTOIL SEALReplace.
Apply liquid gasket (P/N 08718 - 0001 or 08718 -
0OO3) to the head mating surfaces of the No. 1 and
No. 5 camshaft holders on both the intake and
exhaust side.
NOTE: Clean and dry the cylinder head mating sur-
faces before applying liquid gasket.
- Apply liquid gasket to the shaded areas'
7- lnstall the camshaft holders and camshaft holder
plaIe.
NOTE: The arrows marked on the camshaft holders
should point to the timing belt.
Tighten each bolt two turns at a time in the sequence
shown below.
NOTE: Wipe off the excess liquid gasket from the No.
1 and No. 5 camshaft holders with a shop towel
(D - @: 8 x 1.25 mm 27 N.|n (2.8 ksf'm, 20 lbf'ft)
Apply ongine oil to the throads.
O - O: 6 x 1.0 mm 9.8 N'm (1.0 kgfrm, 7.2 lbf'ft)
INTAKE
(D o o o oo o
EXHAUST
lnstall the back cover and camshaft pulleys.
{cont'd)
oooo0o@
CAMSHAFT
6-85

Cylinder Head
Installation (cont'dl
10. Align the marks on the cylinder head plug to thecylinder head upper surface, then install the cylin,
der head plug in the cylinder head.
PLUGReplace.
Install the timing belt (see page 6-63).
Adjust the valve clearance (see page 6-61).
Install the head cover gasket in the groove of the
cylinder head cover. Seat the recesses for the
camshaft first, then work it into the groove around
the outside edges,
NOTE:
. Before installing the head cover gasket, thorough-ly clean the head cover gasket and the groove.
. When installing, make sure the head cover gasket
is seated securely in the corners of the recesses
wrrn no gap.
11.
13.
1'
CYLINDEB HEAD
HEAD COVEB
6-86
(\
14. Apply liquid gasket to the head cover gasket at theeight corners of the recesses.
NOTE:
. Use liquid gasket, Part No. 08718 - 0001 or 08718- 0003.
. Check that the mating surfaces are clean and drybefore applying liquid gasket
. Do not install the parts if five minutes or morehave elapsed since applying tiquid gasket.
Instead, reapply liquid gasket after removing oldrestdue.
. After assembly. wait at least 30 minutes before
filling the engine with oil.

15. When installing the cylinder head cover, hold the
head cover gasket in the groove by placing your fin-
gers on the camshaft holder contacting surfaces
(toD of the semicircles).
Once the cylinder head cover is on the cylinder
head, slide the cover slightly back and forth to seat
the head cover gasket.
NOTE:
. Be{ore installing the cylinder head cover, clean
the cvlinder head contacting surfaces using a
shoP towel.
. Oo not touch the parts where liquid gasket was
applied.
. Replace any washer taht is damaged or deter'o-
rated.
t
\
6-A7
16. Tighten the nuts in two or three steps. In the final
step, tighten all nuts, in sequence, to 9 8 N'm {1 0
kgf.m, 7.2 lbf.ft).
NOTE: After assembly, wait at least 30 minutes
before filling the engine with oil.
After installing, check that all tubes' hoses and con-
nectors are installed correctly.17.

Engine Block
Speciaf Tools ..........." 7-2
lllustlated Index ...................."..'.......... 7-3
Flywheel and Drive Plate
Repf acement """'.' 7-7
Connecting Rod and Crankshaft
End Play ..........."....7-8
Main Bearings
Clearance ............... 7-9
Selection ................7-10
Connecting Rod Bearings
clearance ....'.......... 7-11
Selection ................ 7-11
Pistons and Crankshaft
Removaf ................. 7 -12
Crankshaft
Inspection ."".........7-14
Pistons
Inspection ......"'.....7-15
fnstaffation .............7-23
Cylinder Block
lnspec'tion ..............7-16
Bore Honing ..........7-17
Piston Pins
Removal ...,...........'.7-17
lnstallation .............7-18
Inspection .'............7-19
Connecting Rods
Selection ................7-18
Piston Rings
End Gap ..........".."' 7'2O
Repfacement .........7-2O
Ring-to-Groove Clearance ...........'.'. 7 -21
Afignment .......""'.. 7'21
Crankshaft Oil Seal
fnstaffation .............7-22
Crankshaft
fnstaffation ..-.-..'.".' 7'23
Oil Pan
lnstallation .............7-26
Oil Seals
fnstaffation ....""""' 7-29
r-f

lllustrated Index
I runricate att internal parts with engine oil during reassembly'
NOTE:
o Apply liquid gaskettothe mating surfaces ofthe right side cover and oil pumpcase before installingthem'
. Use liquid gasket, part No 08718-0001 or08718-0003'
. Clean the oil pan gasket mating surfaces betore installing the oil pan
81642 engine:
DRAIN BOLT44 N,m {4.5 kgf'm,33 lbt'ft)
6 x 1.0 mm'11 N.m (1.1 kgI'm,
I tbl.ft)
OIL PANReter to page 7 27when installing.
6 r 1.O mm12 N.m t1.2 kgl'm, 8 7 lbf'lt)
OIL PAN GASKET
BUFFLE PLA
12 x 1.0 mm103 N.m {10.5 kgf'm,
76 tbr.ft)
6 x 1.0 mm11 N.m (1 .1 kgf.m,
8 tbI.fr)
GASKETReplace.FLYWHEEL(M/TI
12 x 1.0 mm
74 N.m (7.5
kof.m, 54 lbf'ft)
1^c{Eb\%^ t*^
*o"rr^--(Wffi
oa*,trto2,.w
FLYWHEEL COVER
IM/T)
DRIVE PLATECOVER (AiT)
11 x 1.5 mm76 N.m (7.9 kgf'm, 56 lbf'ft)
Apply engine oil to the bolt
threads.NOTE: After torqurngeach cap, turn crankshaft
to check for binding.
MAIN EEARING CAP
MAIN BEARINGSSelection, page 7_10
NOTE: New main bearings musl
be selected bY matching crank
and block identification markrngs
CRANKSHAFTInstallation, Page 7'23
OIL JET BOLT16 N.m 11.6 kgf'm, 12 lbl'ft)
OIL JETInspection, Page 8_10
Check for cracks
6x1.0mm11 N.m {1.1 kgf'm, I lbf'ft}
CRANKSHAFT OIL SEAL
Installation,pagesl 22 andl 29
Replace-
DOWEL PINOIL PUMPOverhaul, page 8-'l1Removal/lnspection,page 8-13.Apply liquid gasket
to mating surlace.RIGHT SIDE COVERApply liquid gasket
to mating surface.
THRUST WASHERS8 x 1.25 mm24 N.m {2.4 kgf.m, 17 lbf'ft)Grooved sides face outward
NOTE: Thrusr washer thickness
is tixed and must not be changed
by grinding or shimming
O-RINGReplace
CRANKSHAFT SEAL11 N.m {1.1 kgf'm, lnstallation, pages 7'29 and I 14
a lbt.ltl Heplace. (cont'd)
d#*