1997 HONDA CIVIC Engine replacement

lntake Manifold
Replacement (cont'dl
NOTE: Use new O,rings and gaskets when reassembling.
CAUTION:
. Check lor folds or scratches on the surface of the gasket.. Replace with a new gasket il damaged.
D16Y8 engine:
INTAKE MANIFOLDReplace if cracked orif mating surfaces areoamageo,
INTAKE AIR CONTROL{ract vAt_vE {M/Tl
GASKETReplace.
8 x 1.25 mm24 N.m {2.{ kgtm.17 tbtftt
THROTTLEBODY
8 x 1.25 mm22 N.rn |.2.2 kgl.rn,16 tbtft)INTAKE MANIFOLDBRACKET
9-4

Exhaust Manifold
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
CAUTION:
. Check for folds or scratch€s on the surface of the gasket.
. Replace with a new gasket it damaged.
D16Y5. D16Y7 engines:
I x 1.25 mm24 N.m {2.4 kgt.m, 17 tbtft}
MANIFOLDBRACKET
PRIMARY HEATEDOXYGEN SENSORIPRIMAFY HO2SI44 N.m {4.5 kgf m, 33 lbtft)Replacement, page 9-12
GASKETReplace.
I x 1.25 mm31 N.m (3.2 kgf.m,23 tbf.ft)Beplace.
WAY CATALYTICCONVERTER {TWCIlnspection, page 9'12
6x1.0mm11 N.m {1.1 kgt m,8 lbf.ft)
SECONDARY HEATEDOXYGEN SENSOR(SECONDARY HO2S}44 N.m 14.5 kgf.m,33 lbf.ft)Replacement, page 9-13
9-6

D15Y8 engine:
8 x 1.25 mm2,1 N.m (2.a kgf'm,
17 tbf.ftl
GASKETReplace.
8 x 1.25 mm31 N.m 13.2 kgf'm,23 lbf.ftlReplace.
PRIMARY HO2S44 N.m (4.5 kgf.m, 33 lbtft)Replacement, page 9-13
EXHAUST MANIFOLDBRACKET10 x 1.25 rnm
(cont'd)
9-7
/r4 N.m {4.5 kgf.m, 33 lbf.ft)
v

Exhaust Manifold
Replacement (cont'dl
NOTE: Use new gaskets and self-locking nuts when reassembljng.
CAUTION:
. Check for folds or scratches on the surface ot the gask€t.
. R€place with a new gaskot if damagod,
B16A2 engine:
GASKETReplace.
10 x 1.25 mm44 N.m {4.4 kgt.m,33 tbl.ft)SELF.LOCKING NUT8 x 1 .25 mm31 N.m (3.2 kg{.m, 23 lbf.ft)Replace-EXHAUST MANIFOLDBRACKET
10 x 1.25 mm4{ N.m (4.5 kgf.m. 33 tbt.fil
9-8

Exhaust Pipe and Muffler
\
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling
D16Y5, D16Y7 engines:
HEAT SHIELO
6x1.0mm9.8 N.m tl.0 kgf'm,7.2lbf'ft)
EXHAUST PIPE B
EXHAUST PIPE TIP
/
O
6x1.0mm9.8 N.m 11.0 kgt m, 7.2 lbf'ftl
oP----------------8 x 1.25 mm22 N.m 12.2 kg .m,
16 tbf.f Replace.Tighlen the bolts insteps, alternatingside to-side.
8 x 1.25 mm22 N.m 12.2 kgl'm, 16lbl'ttl
Replace.Tighten the bolts in steps,
alternating side-to-side
GASKETReplace.
SELF-LOCKING NUT
8 x 1.25 mm16 N.m 11.6 kgt m, 12 lbt'ftl
Replace.
(cont'd)
9-9
MUFFLER
neOlace. ----------"+@
SELF.LOCKING NUT10 x 1.25 mm33 N.m (3.4 ksd.m,25 lbf.frlReplace.

Exhaust Pipe and Muffler
Replacement {cont'dl
NOTE: Use new gaskets and self-locking nuts when reassembling.
D16Y8 engine:
MUFFLER
HEAT SHIELD
6x1.0mm9.8 N.m (1.0 kgl m, 7.2 lbf.ft)
EXHAUST PIPE
SECONDARY HO2544 N.m {4.5 kgl.m, 33 lbtftlReplacement, page 9-10
GASKETSReplace.
EXHAUST PIPE A
SELF-LOCKING NUT10 x 1.25 mm54 N.m {5.5 kgl.m, 40 lbtft}Replace.16 N.m {1.6 kgl.m, 12lbf.ft}Replace-
d'*'ou"'"'""'
6x1.0mm9.8 N.m (1.0 ksf m,7.2lbf ft)
8 x 1.25 mm22 N.rn 12.2 kgl.m,16 tbt.ft)Replace.Tighten the bolts insteps, alternatrngside-to-side.
SELF.LOCKING NUT10 x 1.25 mm33 N.m {3.4 kgf.m,25 tbtftlReplace.
TWCinspection, page 9-12
I x 1-25 mm22 N m (2.2 kgf.m. 16 lbfft)
Tighten the bolts in steps,alternating side'to sade.e)GASKETHeplace.
9-10

TWCHO2S
Inspection
l. Using a flashlight, make a visual check for plugging,
melting and cracking of the catalyst.
D16Y5, D16Y7 engines:
816A2, D16Y8 engines:
-\6{-)\
lT
a
A
FLASHLIGI{T
9-12
Replacement
Primary HO2S:
1. Remove the primary HO2S.
D16Y5, D15Y7 engines:
a. Disconnect the primary HO2S connector, thenremove the cover.
8 x'1.25 mm24 N.m {2.4 kgl.m,
PRIMARY H02SCONNECTOR
b. Remove the primary HO2S.
| \l ,l(
I bK/l
l llw.
/
(
PBIMARY HO2S44 N m (4.5 kgf.m, 33 tbI.ft)

Cooling
fllustrated Index ."..."... ""' 10-2
Radiator
Replacement .'....'...."..."
Engine Coolant Refilling and
Bleeding
Cap Testing
Testing
Thermostat
Replacement .............'....
Testing
10-6
10-7
10-9
10-9
10-10
10-10
Engine Goolant TemPerature
(ECT) Switch
Testing """ 10-11
Water PumP
fffustrated Index ......'... " 10-12
Inspection ' 10'14
Replacement ..'..'...."...'.'....'..'.....'.""" 10-14
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