1998 ACURA INTEGRA Service Repair Manual

Intake Manifold/Exhaust System
Intake Manifold
Replacement ............................... g-2
Exhaust Manifold
Replacement ....................................... g-5
Exhaust Pipe and Muffler
Replacement ....................................... g-7
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lntake Manifold
Replacement
PURGE CONTROLSOLENOIO VALVE
8 x 1.25 mm22 N.m 12.2 kgl'm'
16
IDLE AIR
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NOTE: Use new O-rings and gaskets when reassembling
CAUTION: Check tor tolds or scratches on the sudace of the gasket.
81881 engine:
Replace with a new gasket if damaged.
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EVAPORATIVE EMISSION(EVAP}
11 N.m l'1.1 kg{.m,8.0 rbf.fr)
INTAKE AIRTEMPERATURE(IAT} SENSOB
5xO.8mm6 N.m 10.6 kgf'm,4 tbI.tt)
8 x 1.25 mm23 N.m (2.3 kgt'm,17 tbf.fl)
INTAKE MANIFOLOReplace if cracked orif mating surfaces areoamageo.
lrAcl vALvEBe careful not
to damage,
8 x 1.25 mm24 N.m 12.4 kqf .m,
17 lbI.Ir)THROTTLEBODY8 x 1.25 mm22 N.rn 12.2 kgl.m,16 tbf.frl
24 N.m {2.4 kgt.m,17 tbf.{r)
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BRACKET

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NOTEr Use new O-rings and gaskets when reassembling.CAUTION: Check for folds or scratches on the surlace ot the gasket. Replace with a new gasket if damaged.
818C1 engine:
6 x 1.0 mm11 N.m {1.1 kgt.m8.O tbt.trl
EVAP PURGE CONTROLSOLENOID VALVEINTAKE MANIFOLDReplace if cracked orit mating surfaces are
rAc v4f,vE8e caie{ul notto
IAT SENSOR
8 x 1.25 mm24 N.m 12.4 kgt.m,17 tbf'fr)
22 N.m 12.2 k'l.m,16 lbf.ftl
O-BINGReplace.5x0.8mm6 N.m (0.6 kgI'm,4 tbf.trl
INTAKE AIRBYPASS VALBODY
INTAKE MANIFOLOCHAMBER
8 x 1.25 mm23 N.m 12.3 kgt.m,17 tbf.ft)
8 x 1.25 mm22 N.m 12.2 kgt.m,16 tbt'tr)I x 1.25 mm24 N.m (2.4 kgl.m,17 tbf.ft)8 x 1.25 mm24 N.m (2.4 kgt.m,17 tbf.frl
HEATER BYPASSPIPE
8 x 1.25 mm22 N.m 12.2 kgt.m,16 lbt.fr)THROTTLEEODY
(cont'd)
9-3

Intake Manifold
Replacement (con(d)
NOTE: Use new O-rings and gaskets when reassembling.
CAUTION: Check for tolds or scratches on the surface oI the gasket. Replace with a new gasket if damaged
818C5 engine:
5x0,8mm6 N.m 10.6 kgl m,
INTAKE MANIFOLDRoplace il cracked oril mating surfaces aredamaged.
I x 1.25 mm212 N.n 12.2 tsl'm,16 tbf.ftl
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IDI.f AIR CONTROL(IACI VALVEBe careful notto dsmage.8 x 1.25 mmZ' N.m 12.3 kgt'm,17 tbl.ft)THROTTLEBODY
8 x 1.25 mm22 N.m 12.2 kgtm,16 tbf ft)
8 x'1.25 mm24 N.m l2.il kgf.m,17 rbt.ft)
9-4

Exhaust Manifold
Replacement
NOTE: Use new gaskets and sell-locking nuts when reassembling.
81881, 818C1 engine:
EXHAUST MANIFOI-D
8 x 1.25 mm24 N.m (2.4 kgf.m, 17 tbt.trl
,t
8 x '1.25 mm24 N.m 12.4 kgt.m,17 lbt.ftl
SELF-LOCKING NUT8 x 1.25 mm31 N.m 13.2 kgf.m.23 tbl,fr)Replace.
10 x 1.25 mmrt4 N.m (4.5 kgl.m,33 lbf.ttl
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Exhaust Manifold
Replacement (cont'd)
NOTE: Use new gaskets and selt-locking nuts when reassembling-
818C5 ongine:
8 x 1.25 mm2a N.m 12.,r kgf.m, 17 lbf.ftl
GASKETReplace.
8 x 1.25 mm3l N.m 13.2 kgf.m, 23 lbtftlReplace.
10 x 1.25 mma,l N.m (4.5 kg{.m, 33 lbf.ftl
EXHAUST MANIFOLD
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9-6

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Exhaust Pipe and Muffler
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
Bl8Bl engine:
HEAT SHIELOS6 x 1.0 mm9.8 N.m (1.0 kgf.m,7.2 lbf.tr)
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HEAT SHIELD
SELF-LOCKING NUT10 x 1.25 mm33 N.m {3.4 kgt.m,25 rbr.ft)Replace.
24 N.n 12.417 rbf.tr)
BRACKET
8 x 1.25 mm16 N.m {1.6 kgf.m,12 tbf.fttReplace.
33 tbt.tr,
8 x 1.25 mm22 N.m 12.2 kgf.m. 16 lbt.ftlReplace.Tighten the flange nuts in steps,alternating side-to,side.
Replace.
6 x 'l.O mm9.8 N.m l'1.0 kgt.m, 7.2 tbf.ftl
{cont'd}
GASKETSReplace.
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SELF-LOCKING NUTS10 x 1.25 mm54 N.m {5.5 kgf.m,40 tbt.ft)Replace.
TWC Insp€ction:Make a visual check for plugging, meltang orcracking of the catalyst
EXHAUST
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HEATEDOXYGEN SENSOR{PRIMARY XO25I/+4 N.m 14.5 kgf.m,
FLASHLIGHT
| ;"1- {' 'PI i ,"*,2ffi - .t"
i t rl= a+-41
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PIPE TIP
8 r 1.25 mm22 N.m 12.2 kgf.m, '16 tbf.ftlReplace.Tighten rhe bolts in steps,altelnating side-to-side.
SECONDARY HEATEDSENSORISECONDARY HO2S}/+4 N.rn 14.5 kgt'm,33 tbr.frl
9-7

Exhaust Pipe and Muffler
EXHAUST
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NOTE: Use new gaskets and self-locking nuts when reassembling.
818C1 engine:
6 x 1.O mm9.8 N.m (1.0 kgf.m, 7.2 lbf.ft)
HEAT SHIELD
EXHAUST PIPE 8
Replacement (cont'd)
SELF,LOCKING NUT10 x 'l .25 mm33 N.m {3.4 kgt.m,25 tbf.ft)Replace.
PIPE TIP
BRACKET
10 x 1.25 mm38 N.m (3.9 kgl.m,28 tbt.fr)
8 x 1.25 mm22 N.m 12.2 kgt.m, '16 lbI.ft)Replace.Tighren the bolts in steps,alternating side-to-side.
SECONDARY HO2S44 N.m (4.5 kgI.m,33 rbf.fr)
COVER
THREE WAYCATALYTICCONVERTER(TWCI
Inspection page 9 7
EXHAUST PIPE A
SELF-LOCKING NUTS10 x 1.25 mm54 N.m 15.5 kgf.m,40 tbfdr)Replace-
8 x 1.25 mm22 N.rn 12.2 kgf.m, 16 lbf.ft)Replace.Tighten the flange nuts in steps,ahernating side-to-side.
10 x 1.25 mm3a N.m {3.9 kgf.m,28 tbf.fr)Replace.
HEAT SHIELDSMUFFLER
9-8
9.8 N.m {'1.0 kgf'm,7.2 lbf'ft)