engine HONDA CIVIC 1998 6.G Workshop Manual

l.
17.Make sure the transmission is in the E] position.
Fill the transmission with cvT Fluid, and run the
engine for 30 seconds or until approximately 0 95 {
(1.0 US qt.,0.8 lmp qt.) is discharged.
Remove the drain hose, and reconnect the cooler
return hose to the transmission (see page 14-355)
Refill the transmission with CVT Fluid to the proper
level (see page 14-299).
18.
'19.
.l ,
TOOL MAINTENANCE
1. Empty and rinse after each use. Fill the can with water
and pressurize the can. Flush the discharge line to
ensure that the unit is clean.
2, lf discharge liquid does not foam, the orifice may be
blocked.
3. To clean, disconnect the plumbing from the tank at
the large couPling nut.
FILTER
\
\- 0--D
i
I
O.RING
Remove the in-line tilter from the discharge side and
clean if necessary'
The fluid orifice is located behind the filter. Clean it
with the pick stored in the bottom of the tank han-
dle. or blow it clean with air. Securely reassemble
all parts.
COUPLINGNUT
II
-@q
\ORIFICE
FILLER CAP
14-353

t
Adjustment
!@ Make sure lifts, jacks and safety stands are
placed properly (see section 1).
l. Remove the front console (see section 20).
2. Shift to I posirion, then remove the lock pin from
the adjuster.
SHIFT CAELE
l,
,l
{0.7 kgf.m, 5lbf'ltl
3. Check that the hole in the adiuster is perfectly aligned
with the hole in the shift cable. There are two holes in
the adjuster. They are positioned 90" apart to allow
cable adjustment in 1/4 turn increments.
lf the hole is not perfectly aligned, loosen the lock-
nut on the adjuster and adjust as required.
Tighten rhe locknut to 7 N.m (0.7 kgim,5 lbf'ft).
Install the lock pin on the adjuster' lf you feel the
lock pin binding as you reinstall it. the cable is still
out of adjustment and must be readjusted
Make sure the lock pin is seated in the adiuster
securery.
lMove the shift lever to each position, and verify that
the shift position indicator follows the automatlc
transaxle gear position switch.
Start the engine, and check the shift lever in all
positions. lf any gear does not work properly, refer
to troubleshooting (see page 14-294 and 14-295).
Insert the ignition key into the key cylinder on the
Aff gear position indicator panel, and verify that the
shift lock lever is released.
7.
10.
14-355

Driveshafts
Reassembly (cont'dl
Japan-Produced Driveshafts
Note these items during reassembly.
. Clean the disassembled pans with solvent, and dry them thoroughly with compressed air. Do not wash the rubber
parts with solvent.
o r@l : Thoroughly pack the inboard joint and both joint boots with the joint grease included in the new driveshaft
set.
Grease quantity:
Inboard Joint
1600 DOHC WEC engine130 - 140 9 (4.6 - 4.9 oz)
Except 1600 DOHC VTEC engine110 - 120 g (3.9 - 4.2 oz)
Splines (Al0.5 - 1.0 g (0.018 - 0.035 oz)
Outboard Joint
'1600 DOHC WEC engineRubber boot 90 - 'l 00 g (3.2 - 3.5 oz)TPE boot; 105 - 115 9 (3.7 - 4.1 oz)
Except 1600 DOHC VTEC engineRubber boot 70 - 80 g |'2.5 - 2.8 ozlTPE boot 95 - 105 g (3.4 - 3.7 oz)
{1600 DOHC VTEC angine)
SET RINGReplace.
-6{@INBOARD BOOT
-6;Pack cavity with grease.
Pack cavity with grease.
DYNAMIC DAMPER
DYNAMICReplace.
DOUA|.I Lq)P BANDReplace.
(Rubber typc)LOOP BANDReplace.
Pack cavity with grease-
CLAMP BAND
],*"u, ,"^S
/ t'.t$ ,''
,/s
-'-
OUTBOARD BOOTIRUEBER)
16-10
tttt t*' -----_.r...-
._
Replace.

J)
4. lnsert the driveshaft into the outboard joint until the
stop ring is close on the ioint.
DRIVESHAFT
To completely seat the outboard joint, pick up the
driveshaft and joint, and drop them from about 10
cm (4 to 5 inches) onto a hard surface. Do not use a
hammer as excessive force may damage the drive-
shaft.
16-15
J
6. Check the alignment of the paint mark with the out-
board joint end.
Pack the outboard joint with the joint grease includsd
in th€ new ioint boot set.
Gleaso quanlity
U.S., canada, and Brazil'Ploducod:
115 - 135 g {4.0 - 4.8 oz}
Japan-Producod:
161X, DOHC VTEC angino:
Rubbor boot: 90 - 100 g 13.2 - 3.5 oz)
TPE boot: 1tl6 - 115 I {3'7 - tl'l oz}
Excapt 1000 DOHC VTEC engine:
Rubbel boot: 70 - 80 g l.2.5 - 2.8 ozl
TPE boot: 95 - 105 g {3.4- 3.7 oz}
7.
DRIVESHAFT
(cont'd)

System Description
Fluid Flow Diagram
The system is a compact rotary-valve-type power steering, connected to the steering gearbox. The fluid pressure is pro-
vided by a vane-type pump which is driven by the engine crank pulley. The amount of fluid and pressure is regulated by
the flow control valve built into the pump. The fluid pressure from the pump is delivered to the valve body unit around the
pinion of the steering gearbox. The valve inside the valve body unit controls the hydraulic pressure and changes the direc-
tion of the flow. The fluid then flows to the power cylinder. where rack thrust is generated. Fluid returning from the power
cylinder flows back to the reservoir, where the fluid is "filtered" and supplied to the pump again.
RESERVOIR
VALVE BOOY UNIT
SUB.VALVE
FLOW CONTROL VALVESTEERING GEARBOX
17-16

System Description
Steering Pump (cont'dl
The flow control valve and sub-valve in the pump per-
forms the following steps @ through @ to control the
flow of fluid, that is to increase the discharge volume
when engine speed is low, and to decrease it when the
engine speed increases. The assistance thrust of the
steering gearbox changes in compliance with the
change in the discharge volume.
When the engine starts, fluid discharged from the
discharge port starts to flow through oil passage A,
the fixed orifice and the variable orifice to the steer-
ing gearbox. When the engine speed is extremely
low, the return port is closed by the flow control
Fluid pressure discharged from the discharge port
is applied to the top of the sub-valve, and the fluid
pressure that passed through oil passage A is applied
to the bottom of the sub-valve. When this happens,
the pressure difference between the ends of oil pas-
sage A, which is caused by the resistance oil passage
A when the fluid flows through the passage. is
applied to the sub-valve, However, the pressure dif-
ference applied to the sub-valve. that is the force
that pushes the sub-valve down, is too small to
overcome the spring force, and the variable orifice is
fully open when the engine speed is extremely low.
Because the fluid volume flowing through the fixed
orifice and variable orifice increases, a pressure dif-
terence is created between the ends of these ori-
fices, and it increases in proportion to the engine
speed. As the fluid pressure that passed the fixed
orifice and variable orifice is directed to the bottom
of the flow control valve. a pressure difference is
created between the top and bottom of the valve,
which pushes down the flow control valve and
opens the return port. As a result, pan of the fluid
discharged from the discharge port feturns to the
pump suction port, keeping the discharge volume
constant.
In this condition, the sub-valve does not move. and
the variable orifice stays fully open.
lo
trrtrrlo3
J
o
PUMP R.P.M.
To STEERING GEARBOXSUB.VALVE
To STEEnING GEARBOX
FLOW CURVE
!rs+/f/ffih\
o,,-i^"l^tKzYt)91y ul3Yl
FLOW CONTNOL VALVE
su8-vALvE
ORIFICE
ToP
17-18
FLOW CONTROL VALVE

t
To STEERING GEARBOX
To STEERING GEAREOx
@ The fluid volume that flows thorough oil passage A
and the pressure djfference applied to the sub-valve
increase in proportion to the engine speed. The
sub-valve lowers overcoming the spring force, and
it stans to close the variable orifice to regulate the
discharge volume, When this happens, the fluid vol-
ume flowing to the steering gearbox decreases as
the engine speed increases. At the same time, the
flow control valve continues to control the fluid vol-
ume to the return Port,
@ As the engine speed increases funher, the pressure
difference at the sub-valve increases further as well.
The sub-valve then closes the variable orifice com-
pletely, regulating the discharge volume further.
When this happens, the fluid volume discharged
from the pump to the steering gearbox is regulated
and maintained at a given level until the engine
speed reaches the high speed range The flow con-
trol valve functions continues to control the fluid
volume to the return Port.
Pressure Relief
Pressure at the discharge side of the fixed orifice is
directed to the bottom of the flow control valve. When
the pressure builds up, the relief valve in the flow con-
trol valve opens to release the pressure at the bottom of
the valve. This allows the flow control valve to be
pushed back by the pressure difference, and the fluid
volume to the pump return port increases.
As explained above. the system keeps the pump dis-
charge pressure (relief pressure) from exceeding the
given level by controlling the volume of the fluid to the
pump relurn pon,
1.,DAMPING ORIFICE{Docreases excessiv€vibration in the valv6.)
17-19
)
RELIEF VALVE {Opan)
SUB.VALVE
FLOW CONTROL VALVE
/F ft>..\
'-€/K\A/A
o'.'to"5lo'#2"n af11\D7
FLOW CONTROL VALVE

Troubleshooting
General Troubleshooting
Check the following before you begin:. Has the suspension been modified in a way that would affect steering?. Are tire sizes, tire variety and air pressure correct?. lsthe steering wheel original equipment or equivalent?. lsthe powersteering pump belt properlyadiusted?
. ls steeringfluid reservoirfilledto proper level?. ls the engine idle speed correct and steady?
Hard Steering (Check the powor assist. se€ page 17-3o. lfthe torce is over 29 N (3.0 kgf, 6.6lbo, Procede with this troubleshootinq.)
Abnormallluid pressure
{fluid pressureis too high)
Faulty valve body unit
Relief pres-sure too low
Abnormal
Faulty llow control valve(Replace the pump es anassembly)
Ch€ck the feed snd return circuit lin€s ano nosebetw6€n the gearbox and pump for clogging andd€lormation.
Normal line and hose
Check the pump fluid pressure(soe page 17-34).l/easure steady-state tluid pres-s!re while idling with the bothvalves tully open.It should be 1.500 kPa (15 kgf/cmr,213 psi) or below.
Normal
Check th€ flow control vslve (see page 17-42).. Chock the valvo lor smooth movement in the hous-ing.. Check the reliefvalve for leaks.
Check the pump fluid pressure
{see page 17-34).Measure pump relief pressurewhile idling with the pressure con-trol valve Iully closed.It should be 6,400 - 7,400 kPa (65 -
75 kgflcm,,920 - 1,070 psi)
Normal relisf pressure
17-22
Go to page 17-23Faulty pump assembly

I
AbnormalDeformed
Faulty cylinder lines
Adiustment OK
Faulty valve body unit
Normal
IICompair the steering to another alike
vehicle.
/
Check the force required to turn
the wheel (see Page 17 30i
Start the engine and measure the
force required to turn the wheel
to the right and left. Difference of
the lorce required to turn the
wheel to the right and to the Ieft
should be 2.9 N 10 3 kgf, 0.7 lbf)
or below.
Check for bent rack shaft
Check rack guide adiustment (see
page 17-33).
(cont'd)
17 -23
1,,

/
Uneven or rough steering
Steering wheel kicks back
during wide t!rns.
ll,
)
Adjust the rac* guide (see page 17-3).
lf the problem is not corrected bY
adjusting the rack guide, replace
the gearbox.
Adiust the belt tension. Feplace the
belt, il necessary (see Page 17 32).
lfthe engine stalls when the wheel
is turned while car is stopped or
moving at low speed, adjust the
idle spe€d (see section 11)
ldle speed low or erratic.
Check power sleering fluid level lf
the level is excessively low, check
lor leaks in the system. Add lluid
to the specified level.
Air in reservoir, or check Powersteering Iluid level.
lf ltuid level is OK, check O-rings
and seals on both ends of thepump inlet hose, and the P/Spump housing mating surfaces
and the pumP shaft oil seal for
suction leaks. RePlace Parts as
nocessary.
Adjust the belt tension (see Page17 32)or replace belt.Pump belt sliPPing on PLrlleY(pump stops momentarilY)
Check if pump press{rre is normal
and the gauge needle travel is 500
kPa (5 kgl/cm?, 7l Psi) or less.
Chock the flow control valve if the
needle travel exceeds 500 kPa (5
kgflcm', 71 Psi). l{ the flow control
valve is normal, replace the PumPas an assemoly.
Install the power steering pressure
gauge, Close the Pressure contrcl
valve fully and m6ssure the PumPpressure {s€e page 17-34}.
17 -25,