1997 HONDA CIVIC Crankshaft

Timing Belt
Inspection
1.
2.
3.
Remove the cylinder head cover.
. Refer to page 6 46 when installing.
Remove the upper cover (see page 6 19).
Inspect the timing belt for cracks and oil or coolantsoakrng.
NOTE:
. Replace the belt if oil or coolant soaKeo.. Remove any oil or solvent that gets on the belt.
Rotate pulleyand inspect belt.
After inspecting, retorque the crankshaft pullev bolt{see page 6- 16).
o- I6
Tension Adjustment
CAUTION: lt*ays aa;j"t the timing bett rension withthe engine cold.
NOTE:
. The tensioner is spring loaded to apply tension to thebelt automatically after making the following adjustment.
. Always rotate the crankshaft counterclockwise whenviewed from the pulley side. Rotating it clockwisemay result in improper adjustment of the belt ten-sion.
. lnspect the timing belt before adjusting the belt ten-ston.
1.Remove the cylinder head cover.
. Refer to page 6,46 when installing.
Remove the upper cover (see page 6,'19).
Rotate the crankshaft five or six revolutions to setthe belt.
Set the No. 'l piston at TDC (see page 6-21).
Loosen the adjusting bolt 180'.
2.
3.
4.
5.
\I
ADJUSTING BOLT44 N.m {4.5 kgt m,33 rbf.ft)
7.
8.
Rotate the crankshaft counterclockwise three teethon the camshaft pulley.
Tighten the adjusting bolt.
After inspecting, retorque the crankshaft pulley bolt(see page 6-16).

Removal
NOTE:
. Replace the timing belt at 105,000 miles (168.000 km)
according to the maintenance schedule (normal con-
ditions/severe conditions).
lf the vehicle is regularly driven in one or more of the
followlng conditions, replace the timing belt at 60.000
miles (U.S.A.) 100,000 km {Canada).
.In very high temperatures (over 110'F.43'C)
. In very low temperatures (under -20'F, -29"C)'
! Turn the crankshaft pulley so the No. 1 piston is at
top dead center (TDC) before removing the belt (see
page 6'21).
. Inspect the water pump before installing the timing
belt {see Page 10-14).
1. Remove the splash shield (see page 5-7).
2. Loosen the mounting bolt and lock bolt. then remove
the power steering (P/S) pump belt and pump
MOUNTING BOLT
8 x 1.25 mm2il N m 12.4 kgl m, 17 lbf'ft)
P/S PUMPBELT
I x 1.25 mm24 N m (2.4 kgf m, 17 lbt ft)
Loosen the idler pulley center nut and adjusting
bolt, then remove the air conditioning (AVC) com-
pressor belt (see Page 5-6).
Loosen the mounting nut and lock bolt, then remove
the alternator belt.
ALTERNATORBELTLOCK BOLTI x 1.25 mm24 N.m 12.4 kgf.m,r? tbI.ft)
3.
MOUNTING NUT10 x 1.25 mm44 N.m 14.5 kgl m,
33 rb{ ft)
5. Remove the dipstick, then remove the upper cover
and idler PulleY bracket
NOTE: Do not use the upper cover to store removed
items.
6x1.0mm9.8 N.m 11.0 kgf.m,7.2
IDLERI x 1.25 mm24 N.m (2.4 kgl.m, 17 lbf'ft)BRACKET
6. Remove the upper bracket {see page 6-29)
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.
Remove the crankshaft pulley (see page 6-16).
Remove the lower cover and dipstick tube
NOTE; Do not use the lower cover to store removed
items.
1.
.'.
DIPSTICK TUBE
LOWER
6x1.0mm9.8 N.m (1.0 kgf m,
7.2 rbt.ft)
(cont'd)
6-19
Replace.

3. Install the timing belt tightly in the sequence shown'
OTiming belt drive pullev (crankshaft) )@Adjusting
pulley -towater pump pulley J@Camshatt pulley'
NOTE: Make sure the timing belt drive pulley and
camshaft PulleY are at TDC
7.
Loosen and retighten the adiusting bolt to tension
the timing belt.
lnstall the lower cover and upper cover.
NOTE: Clean the upper and lower covers before
installation.
lnstall the crankshaft pulley, then tighten the pulley
bolt (see page &16)
Rotate the crankshaft pulley about five or six turns
counterclockwise so that the timing belt positions
on the Pulleys.
Adjust the timing belt tension (see page 6-18).8.
L
9. Check that the crankshaft pulley and camshaft pul-
ley are both at TDC.
CRANKSHAFT PULLEY:
CAMSHAFT PULLEY:
lf the camshaft and crankshaft pulleys are not posi-
tioned at TDC, remove the timing belt and adjust
the position following the procedure on page 6-20'
Then reinstall the timing belt.
After installation, adjust the tension of each belt
. See section 23 for alternator belt tension adjust-
ment.
a See section 22 tot NC compressor belt tension
adjustment.
. See section 17 for P/S pump belt tension adjust
ment,
(wHrTE)
"UP" MARK
TDC MARK
11.
6-21

Crankshaft Speed Fluctuation (CKF) Sensor
2.
3.
5.
Replacement
4.
1.
6x1.0mm'12 N.m {1.2 kgt.m,8.7 tbf.ft)
6. Installthe CKF sensor in reverse order of removal.
Remove the cylinder head cover.
NOTE: Refer to page 6-46 when installing.
Remove the crankshaft pulley (see page 6_16),
Remove the upper cover and dipstick/tube {seepage 6-19).
Remove the lower cover and idler pulley bracket(see page 6-19).
Disconnect the CKF sensor connector, then removethe CKF sensor.
CKF SENSORCONNECTOR
6-22
:(
I

Removal
Engine removal is not required for this procedure
!!!s@ Make sure iacks and salety stands are
f ta"eata"ea propetty and hoist brackets are attached to the
correct positions on the engine.
CAUTION:
. Use tender covels to avoid damaging painted sul-
faces.
o To avoid damage, unplug the wiling connectors
carefully while holding the connector portion to
avoid damage.
. To avoid damaging the cylinder head, wait until the
engine coolant temperature drops below 100"F
{38"C} before loossning the tetaining bolts.
NOTE:
o Mark all wiring and hoses to avoid misconnectlon
Also, be sure that they do not contact other wiring or
hoses, or interfere with other parts.
. Inspect the timing belt before removing the cylinder
h ead.
. Turnthe crankshaft pu lley so that the No. lpistonisat
top dead center (see Page 6-21)
'1. Disconnect the negative terminal from the battery'
Drain the engine coolant (see page'10-7).
a Remove the radiator cap to speed draining.
Remove the intake air duct and air cleaner housing
(see page 5 3).
Remove the mounting bolt and lock bolt. then
remove the power steering (P/S) pump belt and
pump (see page 5'5).
Loosen the idler pulley center nut and adjusting
bolt' then remove the air conditioning (A'lc) com-
pressor belt (see Page 5-6).
Loosen the mounting nut and lock bolt. then
remove the alternator belt (see page 6-19).
Remove the P/S pump bracket (see page 5-12).
3.
4.
2.
6.
1.
8. Remove the throttle cable by loosening the locknut,
then slip the cable end out of the throttle linkage
NOTE:
. Take care not to bend the cable when removing it
Always replace any kinked cable with a new one
. Adjust the throttle cable when installing (see sec-
tion 1 1).
D16Y7 engine:
Dl6Y5, Dl6Y8 engines:
THFOTTLECABLE
(cont'd)
6-27
LOCKNUT
CABLE

Cylinder Head
4. Apply liquid gasket (Part No. 08718 - 0001 or 08718 -
0003) to the head mating surfaces of the No. 1 and
No.5 camshaft holders.- Apply liquid gasket to the shaded areas
Set the rocker arm assemblY in place and loosely
installthe bolts.- Make sure that the rocker arms are properly posi-
tioned on the valve stems.
Tighten each bolt two turns at a time in the sequence
shown below to ensure that the rockers do not bind
on the valves.
Specitied torquo:
8 mm bolts: 20 N.m (2.0 kgt'm, l/t lbf'ft)
Apply engine oil to the threads.
6 mm bolts: 12 N.m {1.2 kgif'm, 8.7 lbf'ft)
Apply engine oil to the thresds.
6 mm bolts: O, @. @, @
7. Install the back cover. then install the camshaft pul-!
6-45
lnstallation
lnstallthe cylinder head in the reverse order of removal:
NOTE:
. Always use a new head gasket.
. Cylinder head and cylinder block surface must be
clean.
. "UP" mark on the camshaft pulley should be at the top
. Turn the crankshaft so the No. 1 piston is at TDC (see
page 6-20).
. Clean the oil control orifice before installing.
a Do not use the upper cover and lower cover to store
removeo rlems.
Clean the upper cover and lower cover before instal-
taUon.
Cylinder head dowel pins must be aligned.1.
CYUNOER HEAD
PINS
(cont'd)

Gylinder Head/Valve Train
816A2 engine
Special Tools ............. 6'50 Rocker Arms
VTEC Contlol System
Troubfeshooting Flowchart ............ 6-51 Disassembly/Reassembly ...............6'72
VTEC Solenoid ValveRocker Arms and Lost Motion Assemblies
Inspection ...""'...... 5-54 Inspection .........""' 6-73
VTEC Rocker ArmsRocker Arms and Shafts
Manual Inspection ........................... 6-54 Clearance Inspection ..'..."'.............. 6-74
Inspection Using Special Tools .....' 6-55 Camshafts
Valve Clearance
.^ Adiustment .........." 6-57 Valves'Valve Springs and Valve Seals
. t Crankshaft Pulley and Pulley Bolt Removal """"""""' 6-77
Replacement ..".....6-59 Valve Seats
Timing BeltReconditioning ......6'78
Cylinder Headlnstallation '............ 6-82

Valve Glearance
Adjustment
NOTE:
. Valves should be adjusted only when the cylinder
head temperaturs is less than 100'F (38'C)'
. After adjusting, retorque the crankshaft pulley bolt to
177 N.m (18.0 kgf'm, 130 lbt'ft)
1. Remove the cylinder head cover'
NOTE: Refer to page G86 when installing the cylin-
der head cover.
2. Set No. 1 pi$on at TDC. The "UP" mark on the pullsy
should be at the top, and TDC grooves on the pulley
should align with the pointer on the back cover' TDC
grooves {white paint) on the crankshaft pulley should
align with the pointer on the timing belt lower cover'
Number I Piston at TDC:
4.
Adjust valves on No. 1 cylinder.
lntako: 0.15 - 0.19 mm {0'006 - 0.007 in)
ExhaGt 0.17 - 0.21 mm {0'007 - 0 008 inl
Loosen the locknut, and turn the adjusting screw
until the feeler gauge slides back and forth with a
slight amount of drag.
TAPPET ADJUSTERWFENCH SET07MM - PR70110
TAPPET LOCKNUTWRENCH07MAA - PR70120
Adiusting sclaw location:
LOCKNUT20 N.m {2.0 kgf'm, lil lbt'ftl
(cont'd)
6-57