1997 HONDA CR-V section 9

Gylinder Head
lllustrated Index
To avoid damage, wait until the engine coolant temperature drops below 100'F (38'C) before removing the cylinder head.
6x1.0mm9.8 N.m (1.0 kgI.m, 7.2 lbf.ft)WASHERReplace when damagedor deteriorated,CYLINDER HEADCOVEBReter to page 6 32 wheninstalling cylinder head cover.
HEAO COVER GASKETBeplace when leaking,damaged or deteriorated.Apply liquid gasket atthe eight corners of the
RUBEER SEALReplace ifor deteriorated,
8 x 1.25 mm24 N.m (2.4
17 tbtft)
See section 4.
CYLINDEBHEAD PLUGReplace-
---..-@0+---.."...-
s<-- KEY
6x1.0mm9.8 N.m (1.0 kgf.m.7.2 tbf.foApply engine oil to thethreads.
CAMSHAFTHOLDER
DOWELPIN
OIL SEALReplace.
CAMSHAFTPULLEY
8 x 1.25 mm37 N.m {3.8 kgf.m,27 tbtft)
OIL SEALReplace.
6x1.0mm9.8 N.m (1.0 kgl.m, 7.2lbtftl
6-14
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8. Remove the throttle cable by loosening the locknut,
then slip the cable end out of the throttle linkage.
Take care not to bend the cable when removing it.
Always replace any kinked cable with a new one.
'97 - 98 modols:
'!X, - 00 modob:
9. Relieve fuel pressure (see section 11).
@ Do not smoke while working on the
fuel systom. Ko€p opon flame or sparks away from
ths work area. Drain fuol only into an approved
containgr.
'10, Remove the evaporative emission (EVAP) control
canister hose and fuel feed hose.
CANISTER HOSE
{cont'd)
6-17
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13. Remove the upper radiator hose, heater hose and
water bypass hose.
WATER BYPASS
UPPEBRADIATORHOSE
17
HEATERHOSE
Remove the engine wire harness connectors and
wire harness clamps from the cylinder head and the
intake manifold.
o Four fuel injector connectors
. Engine coolant temperature (ECT) sensor con-
neclor
. Radiator fan switch connector
. Coolant temperature gauge sendlng unlt connec-
tor
. Throttle position sensor connector
. Manifold absolute pressure {MAP) sensor con-
nector
Primary heated oxygen sensor (primary HO2S)
connector
ldle air control (lAC) valve connector
Distributor connector
Remove the spark plug caps and distributor from the
cylinder head.
Remove the cruise control actuator (see section 4).
Support the engine with a jack, then remove the
upper bracket. Make sure to place a cushion
between the oil pan and the iack (see page 6-10).
a
18. Remove the cylinder head cover.
19. Inspect the timing belt (see page 6-9).
CYLINDER
(cont'd)
6-19
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Valve Guides
Valve Movement
1. Measure the guide-to-stem clearance with a dial
indicator while rocking the stem in the direction of
normal thrust (wobble method),
lntake Valve Stem-to-Guide Clearance:
Standard (Newl: 0.04 - 0.10 mm
(0.002 - 0.004 in)
Service Limit 0.16 mm (0.006 in)
Exhaust Valve Stem-to-Guide Clearance:
Standard {Newl: 0.10 - 0.16 mm
(0.004 - 0.006 inl
Service Limit: 0,22 mm (0.009 inl
lf the measurement exceeds the service limit,
recheck using a new valve.
lf the measurement is now within the service limit,
reassemble using a new valve.
lf the measurement still exceeds the limit, subtract the
O.D. of the valve stem, measured 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 measure-
ment and the smallest stem measurement should
not exceed the service limit.
lntake Valve Stem-to-Guide Clearance:
Standard (New): 0.02 - 0.05 mm
{0.001 - 0.002 in)
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)
2.
3.
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 the
sDecial tool and a conventional hammer.
VALVE GUIDE DRIVER(Commerciallv available)
2.
3.
(0.25 inl I
_,1-r
,_T-_lrl
'11.3 mm(0.{,r in}
orVALVE GUIDE DRIVER, 6.6 mm0t9a:I - G5t01q)
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. Do not get the head hofter
than 300'F (150"C); excessive heat may loosen the
valve seaIs.
6.4 mm
CAUTION: To avoid burns, uss heavy gloves when
handling the heated cylinder head.
(cont'd)
6-25
*]-- sz mm' l2.21inl
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PistonsCrankshaft
Installation
1. Apply a coat of engine oil to the ring grooves andcylinder bores.
It the crankshaft is already installed.
2. Set the crankshatt to BDC for each cylinder.3. Remove the connecting rod caps, and slip short sections of rubber hose over the threaded ends of theconnecting rod bolts.
4. lnstall the ring compressor, and check that the bear-ang is securely in place.
5. Position the piston in the cylinder, and tap it in usingthe wooden handle of a hammer. Maintain down-ward force on the ring compressor to prevent ringstrom expanding before entering the cylinder bore.6. Stop after the ring compressor pops free, and checkthe connecting rod-to-crank journal alignmentbefore pushing piston into place.
7. Install the rod caps with bearings, and torque theNUIS IO:
31 N.m (3.2 kgf.m,23 tbf.ft)
Apply engine oil to the bolt threads.
lf the crankshaft is not installed:
2. Remove the rod caps and bearings, and install theflng compressor.
3. Position the piston in the cylinder, and tap it inusing the wooden handle of a hammer. Maintaindownward force on the ring compressor to prevent
rings from expanding before entering the cylinderoore,
4. Position all the pistons at top dead center.
The arrow must facethe timing belt sideof the engine.
CONNECTING ROOOIL HOLE
RUBBER HOSES
7 -20
\-\
3.
4.
1.
6.
Installation
Apply a coat of engine oil to the main bearings androd bearings.
Insert the bearing halves in the cylinder block andconnect|ng rods.
Hold the crankshaft so the rod journals for cylindersNo.2 and No. 3 are straight down.
Lower the crankshaft into the block, seating the rodjournals into connecting rods No.2 and No.3.Install the rod caps and nuts finger tight.
outward.
Rotate the crankshaft clockwise, and seat the jour
nals into connecting rods No. 1 and No. 4, Install
the rod caps and nuts finger-tight. Install the capsso the bearing recess is on the same side as therecess an the rod.
Check the rod bearing clearance with plastigage(see page 7 8). then lorque the capnuts.
Torque:
3l N.m 13.2 kgf.m, 23 lbt.ftl
Apply engine oil to the bolt thleads.
5.
7. Install the thrust washers on the No. 4 journal.
Line up the mark wheninstalling connecting rodcap.
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Exhaust Pipe and Muffler
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
€7 - 98 U.S. models (Calitornial:
GASKETReplace.
SELF.LOCKING NUT10 x 1.25 mm33 N.m {3.4 kgt m, 24 lbl.ft)Replace.
MUFFLER
SELF.LOCKING NUTI x 1.25 mm22 N.m (2.2 kg{.m, 16lbt'ftlReplace.Tighten the nuts in stePs,alternating side-to-side.
PRIMARY HO2S44 N.m {{.5 kgl.m,33 tbt.ft)
TWCInspection, see section
SECONDARY HO2S4il N.m lil.5 kgtm,33 tbf.ft)
GASKETReplace.
1l
S*S:--t-..-_
EXHAUSTPIPE A
NUT10 x 1.25 mm54 N.m 15.5 kgi.m,40lbf'tt)Replace.
GASKETReplace.
SELF.LOCKING NUT8 x 1.25 mm22 N.m (2.2 kgf.m,r 6 tbt.ft)Replace.Tighten the nuts insteps, a'ternatingside-to-side.
6x1.0mm9.8 N.m (1.0 kgf.m,7.2 tbt.ltl
SELF.LOCKING NUT8 x 1.25 mm16 N.m {1.6 kgt.m,12 tbt fr)Replace.
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'97 - 98 U.S. models (Except Californial:'99 - 00 models:
GASKETReplace.
SELF.LOCXING NUTl0 x 1.25 mm33 N.m 13.4 kgl.m, 24 lbtft)Replace.
SELF.LOCKING NUT8 x 1.25 mm22 N.m (2.2 kgf.m, 16 lbl.ft)Replace.Tighten the nuts in steps,alternating side to side.
SECONDARY HEATEDOXYGEN SENSOR{SECONDARY HO2SI4il N.m 14.5 kgl.m,33 tbf.ftl
THREE WAY CATALYTICCONVERTER (TWCI
lnspection, see section 11
MUFFLER
PRIMABY HEATEDOXYGEN SENSOR(PRTMARY HO2S)44 N.m (4.5 kgf.m,33 tbf.ftl
GASKETSReplace.
SELF-LOCKING NUT8 x 1.25 mm16 N.m 11.6 kgf.m,12 tbf.fttReplace.
SELF.LOCKING NUT
8 x 1.25 mm22 N,m 12,2 kgi'm,16 tbf.ftlReplace.Tighten the nuts in
steps, alternatingside-to-sade.
9.8 N.m {1.0 kgf.m,7.2 rbf.ft)
x 1.0 mm
NUT10 x 1.25 mm5a N.m (5.5 kgl.m,40 lbf ftlReplace.
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lllustrated Index
CAUTION: The system is under high pressure when the
engine is hot. To avoid danger ol releasing scalding engine
coolant, remove the cap only when the engine is cool.
Total Cooling System Capacity fincluding 0.6 I (0.63 US
qt, 0.53 lmp qt) for heater and reservoirl:
A/T: 5.9 { {6.2 US qt, 5.2 lmp qt)
M/T: 6.0 f (6.3 US $, 5.3 lmp qt)
deterioration and replace if necessar,.
Check all hose clamps and retighten if necessary.
lf any engine coolant spills on the
body, rinse it off immediately.
Check all cooling system hoses
painted portions of the
for damage, leaks or
6x1.0mm9.8 N.m 11.0 kgf.m.1.2 tbl.ftl
RADIATOREngine coolant refilling and bleeding,page 10-5Leak test, page 10 7Inspect soldered joints andseams for leaks.Blow out din from betweencore fins with compressed air.lf insects, etc., are cloggingradiator, wash them off withlow pressure water.RADIATOR CAPPressure test, page 10-7
ATF COOLERHOSEReler to section 14when installing.
LOWERcusHroN
6x1.0mm7 N.m (0.7 kgf.m, 5 lbf ftl
FAN MOTOR
10-2
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