D16Y8 engine HONDA CIVIC 1996 6.G Owner's Manual

Engine Removal/lnstailation
Removal (cont'dl
Dl6Y5. DrGYr, D16Y8 enginas:
-1. Remove the mounting bolt and lock bolt, thenremove the P/S pump belt and pump.
MOUNTING BOLT8 x 1.25 mm24 N.m {2.4 kgl.m, 17 tbf.ftl
LOCK BOLT8 x 1.25 mm24 N.m 12.4 kgf.m, 17 lbf.ftl
17. Loosen the idler pulley center nut and adjustingbolt, then remove the air conditioning (A[/C)compressor belt.
IDI.IR PULLEY CENTERNUT10 x 1.25 mma,l N.m {,1.5 kgt.m, 33 lbf.ft)
5-6
(
'18. Remove the ransmission ground cable and hosect8mo.
HOSE CLAMP6 x '1.0 mm
19. Remove the clutch slave cylinder and line/hoseassembty (M/T).
NOTE:
. Do not disconnectthe pipe/hose assembly.. Do not operate the clutch pedal once the slavecylind€r has been removed.o Take care not to bend the line.
6x1,0mm 8x1.2Smm11 N.m {1.1 kgt.m, 2a N.m t2.4 kgf.m,I tbf.ftl 17 tbf.ftl
8 x 1.25 mm2a N'm {2,4 kgt m,17 tbt.ftl

Engine Removal/lnstallation
Removal(cont'dl
29. Remove the Ay'C compressor.
NOTE: Do not disconnect the Ay'C hoses.
30.
8x 1.25 mm A/C COMPRESSOR24 N.m (2.{ kgf.m, t7 tbtft}
Remove the shift cable (IVT).
NOTE:
. Take care not to bend the cable when removingit. Always replace any kinked cable with a newone.
. Adjust the shift cable when installing (see sec_tion 14).
8 x 1.25 mm22 N.m (2.2 kgf.m, 16 lbf.frl
LOCK WASHERBeplace.6x1.0mm14 N.m (1.4 kgf.m, tO tbtft)
5-8
A/C COMPRESSOR
t
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31. Remove exhaust pipe A.
Dl6Y5. D16Y7 engines:
8 x 1.25 mm22 N.m 12.2 ksl.m. 16 tbI.fr)Replace.
SELF.LOCKING8 x 1.25 mm16 N.m (1.6 kgtm,12 tbt.ftlReplace.
D16Y8 ongin6;
8 x 1.25 mm22 N.m (2.2 kgf.m. 16 tbf.ftlReplace.
GASKETReplace.
SELF.LOCKING NUT10 x 1.25 mm33 N.m {3.4 kgt.m,25 lbr'frlReplace.
SELF.LOCKING NUT8 x 1.25 mm16 N.m 11.6 kgf.m, 12 lbtft)Replace.
SELF-LOCKING NUTl0 x 1.25 mm54 N.m (5.5 kgf.m, 40 lbf.ft)Replace.

Engine RemovaUlnstallation
Installation
Brackei Bolts Torque Specifications:
Dl5Y5, Dl6Y7, Dl6Y8 €nginss
D16Y5, D16Y8 engines (M/Tl:
REAR STIFFENER
8 x 1.25 mm2/t N.m 12.4 kgf.m, 17 tbf.ftl
EXCEPT D16Y5, Dl6Yg engines lM/T)jSTIFFENERTighten the bolts on the stiffenerin the numbered sequence as shown
10 x 1.25 mm44 N.m 14.5 kgf.m,33 tbf.frt
O8x1.25mm24 N.m {2.4 kg{.m,17 tbr.ftt
10 x 1.25 mm14 N.m 14.5 kgt m,33 tbf.ft)
10 x 1.25 mm44 N.m {4.5 kgt m,33 tbr.ftl
10 x 1.25 mm54 N.m {5.5 kgf.m,40 rbf.ftl
10 x 1.25 mm44 N.m {4.5 kg'f.m,33 tbtftlALTERNATOFBRACKET
li) o).
l3l 10 x 1.25 mm44 N.m {1.5 kgt.m,33 tbt.ft)8 x 1.25 mm24 N.m (2.4 kgf.m,17 tbf.ft)
o16Ys, D16Y8enginoslM/T):FRONTSTIFFENER
10 x 1.25 mm4,4 N.m {4.5 kg{.m.33 tbf.ftl8 x 1.25 mm2{ N.m (2.t kgtm,17 rbtft)
10 x 1.25 mm14 N.m (4.5 kgf.m,33 lbf.ftl
5-12

Cylinder Head/Valve Train
Dl6Y5, D16Y7, Dl6Y8 engines
Special Tools ............. G2
VTEC Control System
Troubleshooting Flowchart .........." 6-3
VTEG Solenoid Valve
Inspection ............" 6-6
VTEC Rocker Arms
Manual lnspection
(D16Y5 engine) ............................. 6-7
Manual Inspection
(D16Yg enginel ................'............ 6-7
Inspection Using Special Tools
{D16Y5 engine} .....................""'... 6-8
Inspection Using Special Tools
(D16Y8 engine) .........................'.'. 6-10
Valve Clearance
Adiustment ..."".....6-12
Valve Seals
Replacement (Cylinder head removal
not requiredl ................................ 6-1tl
Crankshaft Pulley and PulleY Bolt
Replacement ."...... &16
Timing Selt
lllustrated Index ............................... 6-17
Inspection .............. 6-18
Tension Adjustment ........................ 6- 1 I
Removal ......,,......... 6-19
lnstallation ............. 6-20
Crankshaft Speed Fluctuation (CKF) Sensor
Repf acement .........6'22
Cylinder Head
lllustrated Index ............................... 6-23
Removal ................. 6-27
Warpage ................ 6-40
lnstallation ............. 6-45
Rocker Arms
Removal ................. 6-30
Disassembly/Reassambly ............... 6-31
Rocker Arms and Lost Motion Assemblies
Inspection (D16Y5, D16Yg
enginesl "..........' 5-34
Rocker Arms and Shafts
Glearance Inspection ....................... 6-35
Camshaft
Inspection .............. 6-36
Valves, Valve Springs and Valve Seals
Removal ........""..... 6-38
Valve Guides
Valve Movement .............................. 6-39
Replacement .........6-41
Reaming .......'......'.' 6-43
Valve Seats
Reconditioning .'....6'40
Valves
lnstallation ............. 6-tt3
Camshaft/Rocker Arms and
Camshaft Seal/Pulley
lnstallation ............. 6-44

I
VTEC Control System
Troubleshooting Flowchart (cont'd)
VTEC PRESSURE SwlTCH 2PCONNECTOR
Wire side of female(€rmrnats
VTEC SOLENOID VALVE lPCONNECTOR
I r----'t I
ll ' ff---r'-'1
I
I
-L
Terminal side ofmale terminal
A/T LOW PRESSUREw/PAt{EL07406-0070300
NOTE: Keep measuring time as short aspossible because engine is running with noload (less than one minute).
PRESSURE GAUGEADAPTER07NAJ - P07010A
A/T PRESSURE I{OSE07406 - 0020201
ot
A/T PRESSURE HOSE.2,210 mm07MAJ - PY&llA andA/T PRESSURE ADAPTER07MAJ - PY,()120
6-4
(From page 6-3)
(To page 6-5)
Test the VTEC Pr6suro SwitchWiro:Nleasure voltage across the VTECpressure switch 2P connector.
. Rcpai. opon in tho wirebrtw.en VTEC pr6.urc switchand G101.. lf th. wir6 b OK, sub.thuto alnown-good ECM/PCM !ndracheck.
ls there baftery voltage?
Te3t the VTEC Solonoid V.lve:1. Turn the ignition switch OFF.2. Disconnect the VTEC solenoidvalve 1P connector.3. Check for continuity betweenthe VTEC solenoid valve 1Pconnector terminal No. 1 andbody ground.
ls there 14 - 30 0?
Te3t tho WEC Solonoid Vatvo:'1. Remove the VTEC pressureswatch and install the specialtool as shown, then reinstallthe VTEC pressure switch.2. Reconnoct the VTEC solenoidvalve 1P connector and VTECpressure switch 2P connector.3, Connect the tachometer (seesection 11).4. Stan the engine.5, Warm up engine to normaloperating temperature (cool,ing fan comes on).6. Check oil pressure at enginespeeds D16Y5 engine: 1,000and 3.000 rpm, D16Y8 engine:1,000,3,000 and 5,000 rpm.
ls pressure below 49 kPa(0.5 kgflcm,, 7 psi)?In.poct the VTEC aolonoid vllvols.c p.g. &6).
:(
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t
:
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VTEC Rocker Arms
Inspection Using Special Tools (D16Y8 enginel
CAUTION:
o Before using the Valve Inspection Tool. mak6 surethat the air pressure gauge on the air comprsssor
indicates ovor 400 kPa {4 kgf/cm,, 57 psil.
. Inspect th6 valve clearanco before rockar arm inspec-
tion.
. Cov€r th€ timing belt with a shop towel to protect
the bolt.
. Check tho intake prima.y rockff arm of each cylindel
at TDC.
1.Remove the cylinder head cover.
NOTE: Refer to page 6-46 when installing the cylinder
neao cover,
Plug the relief hole with the specialtool.
OTLAJ - PR3O2OB
I,^ A IAo- tu
3. Remove the sealing bolt from the inspection hole
ancl connect an air pressure regulator with a 0 - 100psi gauge.
l0 x 1.0 mmSEALING EOLT20 N.m (2.0 kgf.m, 14 lbf.ft)
(AIR PRESSUREREGULATOR
{Commerciallyavailable). Pullthe dialandturn to adjust,

Cylinder Head
lllustrated Index (cont'dl
VALVE KEEPERS
SPRING RETAINER
INTAKE VALVE
VTEC SOLENOIDVALVE FILTEBReplace.
OIL CONTROLORIFICEClean.
INTAKE VALVE SEALReplace.VALVE SPRINGSEAT
INTAKE VAI.VEGUIOE
CAMSHAFTPULLEY
I
I
VALVE KEEPERS
SPRING RET
EXHAUST VALVESPRING
@
EXHAUST VALVESEALReplace.
8 x 1.25 mm37 N.m 13.8 kgt m,27 tbfitlApply engine oiltothe threads.
EXHAUSTVALVE
-vp
e,.io"o reassembring, crean at the parts in sorvent, dry them and appry rubricant to any contact parts.
D16Y8 engine:
LOST MOTIONASSEMgLY
ROCKER ARMASSEMBLYRemoval, page 6 30Inspection, page 6-34
5xl.0mm12 N.m {1.28.7 tbf.ft)
VALVE SPRINGSEATEXHAUSTVALVE O.RINGGUIDE Replace.Inspection, page 6 39Replacement, page 6 41Reaming, page 6 43
LOST MOTIONASSEMBLYHOLDER
INTAKE VALVEBemoval, page 6 38Installation, page 6 43
20 N.m 12.0 kgl.m, 14 tbf.ft)Apply engine oit to thethreads.
\
\
s9illl
CAMSHAFTInspection, page 6-36
OIL SEALBeplace.
CYLINDER HEADRemoval, page 6 27Warpage, page 6-40Valve seat reconditioning,page 6 40Installation, page 6-45
6x1.0mm12 N.m (1.2 kgt.m,8.7 lbf.ftlApply engine oil to thethreads,

Cylinder Head
Removal (cont'd)
9. Relieve fuel pressure (see section 11),
E@E Do not smoke while working on tho fuelsystem. Ke6p opgn flame or gpark away from lhework area, Drain fuel only into an app.oved containgr.
10. Remove the evaporative emission (EVAP) controlcanister hose, fuel feed hose and breather hose.
D16Y7 engine:
BANJO BOLT33 N.m {3.4 kgt m,25 tbf.ftt
BREATHER HOSE
D15Y5, Dl6YB engines:
BANJO AOLT33 N.m (3.4 kgf.rn,25 tbf.ftt
EVAP CONTROLCANISTER HOSE
6-28
(
1 1. Remove the brake booster vacuum hose. fuel returnhose and vacuum hose (see page S_4).
12. Remove the water bypass hose and positive crank_case ventilation (pCV) hose.
016V7 engine:
PCV HOSE
D16Y5, D16Y8 engines:
\a
I
WATER EYPASS
PCV HOSE

13. Remove the upper radiator hose' heater hose and
water bYPass hose
WATEREYPASSHOSEUPPERRADIATORHOSE
14.
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-
nector
a
a
a
ECT switch connector
ECT gauge sending unit connector
Throttle position sensor connector
Manitold absolute pressure (MAP) sensor con-
nector
Primary heated oxygen sensor (primary HO2S)
connector
Secondary heated oxygen sensor (secondary
HO2S) connector (D16Y7 engine)
Exhaust gas recirculation (EGR) valve lift sensor
connector (D16Y5 engine)
. VTEC solenoid valve connector (Dl6Y5, D16Y8
engrnes)
. VTEC pressure switch connector (D16Y5. D16Y8
engrnes,
. ldle air control (lAC) valve connector
15.Remove the spark plug caps and distributor from
the cylinder head.
Remove the uPPer bracket.
NOTE:
. Use a jack to support the engine before the
upper bracket is removed.
. Make sure to place a cushion between the oil
pan and the jack.
12 x 1.25 mm
74 N.m {7.5 kgf m.
sil lbl.ftl
UPPERBRACKET
'17. Remove the cylinder head cover'
CYLINDERHEAD COVER
(cont'd)
6-29

D16Y8 engine:
No. 5 CAMSHAFTHOLDER
ARM B
ROCKER ARMS
No. 4 CAMSHAFTHOLOER
No. 3 CAMSHAFTHOLDER
No. 2 CAMSHAFTHOLDER
No. 'l CAMSHAFTHOLDER
R(rcKER SHAFTSPRING
Letter "B" is stampedLetter "A" is stamped
L
INTAKE SOCKER SHAFT
ROCKER SI{AFT
COLLARNUBBER BANDCOLLAR
EXHAUST ROCKER SHAFT
6-33