1997 HONDA CIVIC Crankshaft

Flywheel
\Inspection
1.
2.
3.
Inspect the ring gear teeth for wear and damage
Inspect the clutch disc mating surface on the
flywheel for wear, cracks, and burning.
Measure the flywheel runout using a dial indicator
through at least two full turns Push against the
flywheel each time you turn it to take up the
crankshaft thrust washer clearance.
NOTE: The runout can be measured with engine
installed.
Standard (New): 0.05 mm (0.002 inl max.
Service Limit: 0.15 mm {0.006 in)
FLYWHEEL
OIAL INOICATOR
FLYWHEEL
lf the runout exceeds the service limit. replace the
flywheel.
Turn the inner race o{ the ball bearing with your tin-
ger. The ball bearing should turn smoothly and qui
etly. lf the inner race does not turn smoothly and
quietly, replace the bearing. Check that the ball
bearing outer race fits tightly in the flywheel. lf it is
loose. replace the ball bearing
IJ
4.
BALL BEARING tO
Replacement
1. Installthe special tool.
MOUNTINGBOLTS
RITIG GEAR HOLDER
oTLAB-PV00100oto7924-PD20003
2.Remove the flywheel mounting bolts in a crisscross
pattern in several steps as shown, and remove the
flywheel,
Remove the ball bearing from the flywheel
(cont'dl
12-9
FLYWHEEL
t\
m\J

FlywheelClutch Disc, Pressure Plate
Replacement (cont'dl
4. Drive the new ball bearing into the flywheel using
the special tools as shown.
DRIVER07749-0010000
ATTACHMENT,32x35mm07746-OOIOTOO
FLYWHEEL
BEARING
Align the hole in the flywheel with the crankshaft
dowel pin and install the flywheel. Install the
mounting bolts finger-ti9ht.
Install special tool, then torque the flywheel mount-
ing bolts in a crisscross pattern in several steps as
snown.
5.
6.
MOUNTING BOLTS118 N.m (12.0 kgl.m,87 tbf.ft)
RING GEAR HOLDER07LAB-PV00100ol07924 -PO20003
WVa// ,
12-10
Installation
1. Install the special tool.
Y
07936-3710r00
{P/N 08798-90021
RING GEAR HOLDER07LAB-PVOO100ot07924-PD20003
CLUTCH ALIGNMENT SHAFTOTJAF_PM7012A
2.
3.
Installthe clutch disc using the special tools.
Install the pressure plate.
RING GEAR HOLDERoTLAB PV00'l OO
07924 PD20003
OTJAF_PM70124HANOLE07936-3710100
CLUTCH DISC

Description
The automatic transmission is a 3-element torque converter and a dual-shaft electronically controlled unit which provides
4 soeeds forward and 1 reverse.
Torque Convertel, Geats, and Clutches
The torque converter consists of a pump, turbine and stator, assembled in a single unit. They are connected to the engine
crankshaft so they turn together as a unit as the engine turns. Around the outside of the torque converter is a ring gear
which meshes with the starter pinion when the engine is being started. The entire torque converter assembly seryes as a
flywheel while transmiuing power to the transmission mainshaft.
The transmission has two parallel shafts: the mainshaft and the countershaft. The mainshaft is in Iine with the engine
crankshaft. The mainshaft includes the 1st, 2nd and 4th clutches, gears tor 2nd, 4th, reverse and lst (3rd gear is integral
with the mainshaft, while the reverse gear is integral with the 4th gear). The countershaft includes the 3rd clutch, and
gears for 3rd,2nd, 4th, reverse. 1st and park. The gears on the mainshaft are in constant mesh with those on the counter-
shaft. When certain combinations of gears in transmission are engaged by clutches. power is transmitted from the main-
shaft to the countershaft to provide E, ld, E, and E positions.
Electronic Control
The electronic control svstem consists of the Powertrain Control Module {PCM), sensors, a linear solenoid and four
solenojd valves. Shifting and lock-up are electronically controlled for comtonable driving under all conditions. The PCM is
located below the dashboard, under the front lower panel on the passenger's side
Hydraulic Control
The valve bodies include the main vatve body, the secondary valve body, the regulator valve body, the servo body and the
lock-up valve body through the respective separator plates, They are bolted on the torque converter housang
The main valve body contains the manual valve, the 1-2 shift valve. the 2nd orifice control valve, the CPB {Clutch Pressure
Back-up) valve, the modulator valve. the servo control valve, the relief valve, and ATF pump gears The secondary valve
body contains the 2-3 shift valve. the 3-4 shift valve, the 3-4 orifice control valve, the 4th exhaust valve and the CPC (Clutch
pressure Control) valve. The regulator valve body contains the pressure regulator valve, the torque converter check valve,
the cooler relief valve, and the lock-up control valve. The servo body contains the servo valve which is integrated with the
reverse shift fork, and the accumulators. The lock-up valve body contains the lock-up shift valve and the lock-up timing
valve. The linear solenoid and the shift control solenoid valve Ay'B are bolted on the outside of the transmission housing,
and the lock-up control solenoid valve Ay'B is bolted on the outside of the torque converter housing. Fluid from regulator
passes through the manual valve to the various control valves. The clutches receive fluid from their respective teed pipes
or internal hydraulic circuit.
Shift Control Mechanism
Input from various sensors located throughout the car determines which shift control solenoid valve the PCM will activate
Activating a shift control solenoid valve changes modulator pressure, causing a shift valve to move. This pressurizes a line
to one of the clutches, engaging that clutch and its corresponding gear, The shift control solenoid valves A and B are con-
trolled by the PCM.
Lock-up Mechanism
In ,Dt1 position, in 3rd and 4th. and in E position in 3rd, pressurized fluid is drained from the back of the torque converter
through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes place, the
mainshaft rotates at the same as the engine crankshaft. Together with hydraulic control, the PCM optimizes the timing of
the lock-up mechanism. The lock-up valves control the range of lock-up according to lock-up control solenoid valves A and
B, and linear solenoid. When lock-up control solenoid valves A and B activate, the modulator pressure changes The lock-
up control solenoid valves A and B and the linear solenoid are controlled by the PCM.
(cont'd)
14-3

Description
Lock-up System (cont'd)
TOROUE CONVERTER
In B.rl position, in 3rd and 4th, and lDl_- position in 3rd.pressurized fluid is drajned from the back of the torqueconverter through a fluid passage. causing the lock-uppiston to be held against the torque convener cover. Asthis takes place, the mainshaft rotates at the same speedas the engine crankshaft, Together with the hydrauliccontrol, the PCM optimized the timing of the lock_upsystem. Under certain conditions, the lock_up clutch isapplied during deceleration, in 3rd and 4th gear.
The lock-up system controls the range of lock_up accord_ing to lock-up control solenoid valves A and B. and thelinear solenoid. When lock-up control solenoid valves Aand B activate, modulator pressure changes. Lock_upcontrol solenoid valves A and B and the linear solenoidare mounted on the outside of the torque converterhousing. and are controlled by the pclvl.
Lock-up Conditions/Lock-up Control Solenoid Valves/Linear Solenoid Pressure
MODULATOR PRESSURE
.-- LINEAR SOLENOID PRESSURE
LOCK.UP CONTROL. VALVE
LOCK.UP CONTROLSOLENOID VALVELock-up
Conditions
Lock-up Control
Solenoid ValveLineal
Solenoid
PressureAB
Lock-up OFFOFFOFFHig h
Lock-up. HalfONDuty operation
OFF - ON
Lock-up. FullONONHigh
Lock-up
during
decelerationONDuty operation
OFF * ONLowTOROUE CONVERTERCHECI( VALVE
RELIEF VAI-VE
LOCK.UP TIMINGVALVE
^ r______rr r cooLER RELTEF VALVE
t'-
14-34
ATF PUMP

19. Remove the engine stiffener and the torque con-
verter cover.
Remove the eight drive plate bolts one at a tlme
while rotating the crankshaft pulley.
Remove the distributor.
Attach a hoisting bracket to the engine, then lift the
engine slightly.
HOISTBRACKET
20.
21.
COVER
23. Place a jack under the transmission. and ra6a :'.
transmission iust enough to take weight otf ol tF.
mounts. then remove the transmission mounl
TRANSMISSIONMOUNT BRACKET
Remove the transmission housing mounting bolts
and the rear engine mounting bolts.
Pull the transmission away from the engine until it
clears the 14 mm dowel pins, then lower it on the
transmission jack.
TRANSMISSION HOUSING
lf necessary, remove the torque converter anc:"
starter motor.
24.
25.
1+16

Transmission
Installation (cont'dl
9. Attach the torque converter to the drive plate witheight drive plate bolts and torque as follows:Rotate the crankshaft pulley as necessary to tightenthe bolts to 1/2 of the specified torque. then to thefinal torque, in a crisscross pattern.
After tightening the last bolt, check that the crank-shaft rotates freely.
TOROUE: 12 N.m {1.2 kgl.m, 8.7 tbt{r}
10 x 1.25 mm
6x1.0mm12 N.m (1.2 kgt m,8.7 rbt ft)
I 1.25 mm2/t N.m {2.4 kg{.m,17 tbt ftlCONVERTEB
10. Install the torque convener cover and the €nginestiffener.'11. Tighten the crsnkshaft pull€y bolt, if necessary (see
section 61.
12. Connect the ATF cooler hoses to the ATF cooler lines(see page 1,t192).
ATF COOIIRUNE
10 x 1.25 mma,l N.m {4.5 kgl.m,33 rbt.fttRIGHT FRONT 12 x 1.25 mmMOUNT/BRACKET 6.t N.m (6.5 kg{.m,47 tbt ftl
13. Install the right front mounvbracket.
4,r N.m 14.5 kgf.m,33 lbtft)
COVER
L,
14-1A4
SHIFT CABLE
SHIFT CAAE COVER
14. Install the control lever with a new lock washer tothe control shaft, then install the shift cable cover.
CAUION: Taks care not to bend the shift cable.
L(rcK WASHERReplace.
8 x 1,25 r'|m22N-m12.2 tgt m. 16lbnftl
x 1.0 mmtit N.m 11.4 kgt m,10 tbr,ft,
15. lnstall the exhaust pipe A.
NOTE: D16Y8 engine is shown; D16y/ engine is sim_ilar.
Replace.
GASKETReplace.
SELF.LOCKING NUTReplace.10 x 1.25 mm54 N.m (5.5 lgf.m,40 tbt ftl
NUTSELF.LOCKING NUTReplace.8 x 1.25 mm22 N.m {2.2 kgl.m, 16lbtfrl
Replace.8 x 1.25 mm16 N.m {1.6 kgI.m,12 tbf.ft)

Description
The Continuously Variable Transmission (CVT) is an electronically controlled automatic transmission with drive and driv
en Oullevs, and a steel belt. The CVT provides non stage speeds forward and one reverse. The entire unit is positioned in
line with the engine.
Transmission
Around the outside of the flywheel is a ring gear which meshes with the starter pinion when the engine is being staned.
The transmission has four parallel shafts: the input shaft, the drive pulley shaft. the driven pulley shaft, and the secondary
gear shaft. The input shaft is in line with the engine crankshaft. The drive pulley shaft and the driven pulley shaft consist of
movable and fixed face pulleys. Both pulleys are linked by the steel belt.
The input shaft includes the sun gear. The drive pulley shaft includes the forward clutch which mounts the carrier assem-
bly on the forward clutch drum. The carrier assembly includes the pinion gears which mesh with the sun gear and the ring
gear. The ring gear has a hub-mounted reverse brake disc.
The driven pulley shaft includes the start clutch and the secondary drive gear which is integral with the park gear' The sec-
ondary gear shaft is positioned between the secondary drive gear and the final driven gear. The secondary gear shaft
includes the secondary driven gear which serves to change the rotation direction. because the drive pulley shaft and the
driven oullev shaft rotate the same direction. When certain combinations of planetary gears in the transmission are
engaged by the clutches and the reverse brake, power is transmitted from the drive pulley shaft to the driven pulley shaft
to provide E, E, E, and El.
Electronic Control'96 - 98 Models:
The electronic control system consists of the Transmission Control Module (TCM), sensors, three linear solenoids, and a
inhibitor solenoid. Shifting is electronically controlled under all conditions'
The TCM is located below the dashboard, behind the kick panel on the driver's side.'99 - 00 Models:
The electronic control svstem consists of a Powertrain Control Module (PCM), sensors, three linear solenoids and an
inhibitor solenoid. Shifting is electronically controlled under all conditions. A Grade Logic Control System to control shift-
ing in E position while the vehicle is ascending or descending a slope.
The PCM is located below the dashboard, under the kick panel on the passenger's side.
Hydraulic Control
The lower valve body assembly includes the main valve body, the Pressure Low (PL) reguiator valve body, the shift valve
body, the start clutch control valve body, and the secondary valve body. They are positioned on the lower part of the
transmission housing.
The main valve body contains the Pressure High (PH) control valve, the lubrication valve, and the pitot regulator valve.
The secondary valve body contains the PH regulator valve, the clutch reducing valve, the start clutch valve accumulator,
and the shift inhibitor valve. The PL regulator valve body contains the PL regulator valve and the PH-PL control valve
which is ioined to the PH,PL control linear solenoid. The inhibitor solenoid valve is bolted on the PL regulator valve body.
The shift valve body contains the shift valve and the shift control valve. which is joined to the shift control linear solenoid.
The start clutch control valve body contains the start clutch control valve, which is joined to the start clutch control linear
solenoid. The linear solenoids and the inhibitor solenoid are controlled by the TCM or PCM. The manual valve body which
contains the manual valve and the reverse inhibitor valve, is bolted on the intermediate housing.
The ATF pump assembly is located on the transmission housing, and is linked with the input shaft by the sprockets and
the sprocket chain. The pulleys and the clutch receive fluid from their respective feed pipes, and the reverse brake receives
fluid from internal hydraulic circuit.
Shift Control Mechanism
Input from various sensors located throughout the vehicle determines which linear solenoid the TCM or PCM will activate.
Activating the shift control linear solenoid changes the shift control valve pressure, causing the shift valve to move. This
pressurizes the drive pulley pressure to the drive pulley and the driven pulley pressure to the driven pulley and changes
their effective pulley ratio. Activating the start clutch control linear solenoid moves the start clutch control valve. The start
clutch control valve uncovers the port, providing pressure to the start clutch to engage it(cont'd)
14-195
,!

Transmission
Removal (cont'd)
10. Remove the cotte. pins and castle nuts, then separatethe ball joints from the lower arm (see section 1g).
SELF-LOCKING -=V,
NUT \Replace. oitupea rOax
Remove the right damper fork bolt, then separateright damper fork and damper.
Pry the right and left driveshafts out of the differen-tial.
Pull on the inboard joint to remove the right and leftdriveshafts (see section 16).
Tie plastic bags over the driveshaft ends.
NOTE: Coat all precision finished surfaces with cleanengine oil.
Remove the exhaust pipe A.
/\<,\CASTLE I{UT COTTERReplac6.
't 1.
't2.
tJ.
14.
q.
SELF.LOCKINGNUTReplace.
SELF.LOCKING NUTReplace.
14-306
EXHAUST PIPE A
19.
'16, Remove the right front mounvbracket,
ATF COOLER HOSE
17. Remove the ATF cooler hoses at the ATF coolerlines. Turn the ends of the ATF cooler hoses uo toprevent CVT fluid from flowing out, then plug theATF cooler hoses and lines,
NOTE: Check for any sign of leakage at the hosejoints.
18. Remove the engine stiffeners and the flywheel cover.
Remove the eight drive plate bolts one at time whilerotating the crankshaft pullev.
ENGINE STIFFENER