1996 HONDA CIVIC Rocker arms

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

VTEC Rocker Arms
2.
Manual Inspection (D16Y5 engine)
3.
1.
4.
Set the No. 1 piston at TDC.
Remove the cylinder head cover.
NOTE: Refer to page 6-46 when installing the cylin-
der head cover.
Move the intake secondary rocker arm on the No. 'l
cylinder manually.
Check that the intake secondary rocker arm moves
independently of the primary intake rocker arm,
SECoNDARY PtROCKER ARM. Push and pull.
Check the intake secondary
cylinder at TDC.
rocker arm of each
a lf the intake secondary rocker arm does not move,
remove the primary and secondary intake rocker
arms as an assembly and check that the pistons in
the secondary and primary rocker arms move
smoothly.
a lf any rocker arm needs replacing, replace the pri-
mary and secondary rocker arms as an assembly.
PRIMARY ROCKER ARM
4.
Manual Inspection (D16YB engine)
1.Set the No. 1 piston at TDC.
Remove the cylinder head cover.
NOTE: Reter to page 6-46 when installing the cylin-
der head cover.
Push the intake mid rocker arm on the No. 1 cylin-
der manually.
Check that the intake mid rocker arm moves indepen-
dently of the primary and secondary intake rocker
arms.
MID ROCKERARM
Check the intake mid rocker arm of each cylinder at
TDC,
lf the intake mid rocker arm does not move.
remove the mid, primary and secondary intake
rocker arms as an assembly and check that the pis-
tons in the mid and primary rocker arms move
smoothly.
lf any rocker arm needs replacing, replace the
primary, mid, and secondary rocker arms as an
assemory.
5,
6-7

VTEC Rocker Arms
Inspection Using SpecialTools (Dl6Y5 enginel
CAUTION:
. Before using th6 Valve Inspection Tool, make 3ure
that ths air pressure gaugo on the air comptsssor
indicates over iloo kPa 14 kgf/cmr, 57 psi).
. Inspecl th6 valv€ clearance beforo rocker atm insDec"
tion,
'1.
Cover the timing belt with a shop towel to protect tho
belt.
Check ths intakg primaty rocker arm of each cylindqr atTDC.
Remove the cylinder head cover.
NOTE: Refer to page 6-46 when installing the cylin-
der head cover.
Plug the relief hole with the special tool.
YY
OTLAJ - PR3O2OB
(
3, Remove the sealing bolt from the inspection holeand connect the an air pressure regulator with a 0 -
100 psi gauge.
10 x 1.0 mmSEALING BOLT20 N.m {2.0 kgj'm. 14lblft}
l
I
'10 x 1.0 mmADAPTER;NSp€CTTONHOLE (Commercially
available)
l'Pullthe dial andturn to adlust,
Loosen the regulator valve on the valve inspection
tool and apply the specified air pressure.
Spocified Air Pressurei
250 kPa {2.5 kg,t/cm,,36 psi}
o-at

5. With the specified air pressure appli€d, push up the
timing plate; the synchronizing piston will pop out
and engage the intake secondary rocker arm.
Visually check the engagement of the synchronizing
prston.
NOTE;
The synchronizing piston can be seen in the gap
between the secondary and primary rocker arms,
With the timing plate engaged in the groove on
the timing piston, the piston is locked in the
oushed out Dosition.
TIMIiIGPLATESPRIT{C
PRIMARY ROCKER ARM
AIR PRESSURE
GROOVE
SECO DARYROCKER ARM
TIMIT{G PLATE
TIMING SPRING
6-9
6. Stop applying air pressure and push up the timing
plate; the synchronizing piston will snap back to its
original position.
Visually check the disengagement of the synchro-
nizing pistons.
NOTE:
. When the timing plate is pushed up, it releases
the timing piston, letting the return spring move
the synchronizing piston to its original position.
7. Replace the intake rocker arms as an assembly if
either does not work correctly,
TIMING PLATE
oll PASSAGE --!
PRIMARY ROCKER
ARMSECOI{DARYROCKER ARM
TIMII{G SPRII{GRETURI{ SPRING
Remove the spscial tools.
After inspection, check that the malfunction indicator
lamp (MlLl does not come on.
TIMI G PISTOI{

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,

4. Loosen the regulator valve on the valve inspection
tool and apply the specified air pressure.
Specified Air Pressure:
250 kPa {2.5 kgf/cm', 36 psil
PRIMARY ROCKERARM
SYNCHRONIZING SYNCHRONIZINGPISTON A PISTON B
Make sure that the intake primary and secondary
rocker arms are mechanically connected by the piston
and that the mid rocker arm does not move when
oushed manuallY.
5.
MID ROCKER SECONDARYARM ROCKER ARM
SECONDARYROCKER ARM
lf any intake mid rocker arm moves independently of
the primary and secondary rocker arms, replace the
rocker arms as a set.t
1.
8.
9.
Remove the special tools.
Use a 10 mm diameter rod to depress each lost
motion assembly through its full movement.
Replace any lost motion assembly that does move
smoothly.
After inspection, check that the MIL does not come
on.
ASSEMBLY
6-11

Valve Seals
Replacement (Cylinder head removal not requiredl
NOTE: Cylinder head removal is not required in thisprocedure.
The procedure shown below applies when using the in-
car valve spring compressor (Snap-on YA884S withY48845 - 2 A7/8" attachment).
!@@ Alway wear approved eye protection whenusing ihe in-cai valve spring compressor.
1. Turn the crankshaft so that the No. I and the No. 4pistons are at top dead center (TDC).
2. Remove the cylinder head cover and the rocker arm
assembly.
NOTE:
. Refer to page 6-30 for rocker arm assembly
removat.
. When removing or installing the rocker armassembly, do not remove the camshaft holder
bolts. The bolts will keep the holders, springs
and rocker arms on the shaft.
. Refer to page 6-46 when installing the cylinder
head cover.
Remove the fuel injectors and the wire harness.
Using the 8 mm bolts supplied with the tool. mount
the two uprights to the cylinder head at the end
camshaft holders. The uprights fit over the cam-
shaft as shown.
lnsert the cross shaft through the top hole of thetwo uprights.
3.
4.
6-14
Intake Valve Seals:
6. Select the 7/8 in diameter short compressor attach-ment, and fasten the attachment to the No. 4 hole of
the leve. arm with the speed pin supplied.
8.
7.lnsert an air adapto. into the spark plug hole. pump
air into the cylinder to keep the valve closed whilecompressing springs and removing the valve keepers.
Put shop towels over the oil passages to prevent
the valve keepers from falling into the cylinder
neao.
OIL PASSAGES
Position the lever arm under the cross shaft so thelever is perpendicular to the shaft and the compres-
sor attachment rests on top of the retainer for thespring being compressed. Use the front position
slot on the lever as shown.
,
I
i'
OIL PASSAGES
IN-CAR SPRING COMPRESSOR
SLOT

Cylinder HeadRocker Arms
18.
19.
21.
22.
Removal (cont'd)
Remove the timing belt {see page 6-19).
Remove the camshaft pulley and back cover,
CAMSHAFTPULLEYClean when installing.
6x1.0mm8 x 1.25 mm37 N.m (3.8 kgf.m,21 tbtlrlApply engine oilto thebolt threads.
Remove the exhaust manifold {see pages 9-6 and 9_7).
Remove the intake manifold (see pages 9-2 thru 4).
Remove the cylinder head bolts, then remove thecylinder head.
CAUTION: To pr€vent warpage, unsclew lhe bohsin sequonce 1/3 turn at a time; rgpeat tho sequenceuntil all bolts are loosened.
CYLINDER HEAD BOLTS LOOSENING SEOUENGE:
6-30
Removal
1. Loosen the adjusting screws.
2. Unscrew the camshaft holder bolts, then,removethe rocker arm assembly.
NOTE:
a Unscrew the camshaft holder bolts two turns at at,me, in a crisscross pattern, to prevent damao_ing the valves or rocker arm assembly.. When removing the rocker arm assembly, do notremove the camshaft holder bolts. The bolts willkeep the camshaft holders, the springs and therocker arms on the shaft.
CAMSHAFT HOLDER BOLTS LOOSENINGSEOUENCE:
\(
ADJUSTING SCREWS