Cylinder head cover bolts HONDA CIVIC 1999 6.G Workshop Manual

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

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)

Cylinder Head
Installation (cont'dl
Position the camshaft correctly (see page 6-20).
Tighten the cylinder head bolts sequentially in four
steps.
rsr st.p: O - @ 20 N.m (2.0 kgf.m, 14 lbf'ft|
2nd srep: O - @ 49 N.m (5.0 kgf.m, 36 tbtft)
3rd stop; O - @ 67 N.m {6.8 kgf.m, /r9 lbl'ft}
4th st6p: O, O 67 N.m 16.8 kgf.m, 49 tbf.ftl
NOTE:
. We recommend using a beam-type torque
wrench, When using a preset-type torque wrench.
be sure to tighten slowly and not to overtighten.
. If a bolt makesany noisewhileyou aretorquing it,
loosen the bolt, and retighten it from the 1st step,
CYLINDER HEAD BOLTS TOROUE SEOUENCE:
Install the intake manifold and tighten the nuts in a
crisscross pattern in two or three steps, beginning
with the inner nuts (see pages 9-2 thru 9-4).
. Always use a new intake manifold gasket.
Install the exhaust manifold and tighten the nuts in
a crisscross pattern in two or three steps, beginning
with the inner nut {see pages 9-6 and g-7).
. Always use a new exhaust manifold gasket.
Install the exhaust manifold bracket. lnstall the
exhaust pipe A and the bracket, then install the cover.
4.
6-46
\-
(
7.Installthe timing belt (see page 6-20).
Adjust the valve clearance (see page el2),
Install the head cover gasket in the groove of the
cylinder head cover, Seat the recesses for the
camshaft first, then work it into the groove around
the outside edges.
NOTE:
. Before installing the head cover gasket, thor-
oughly clean the seal and the groove.
. When installing, make sure the head cover gas-
ket is seated securely in the corners of the
recesses wath no gap.
COBNERS OFTHE RECESS
CORNERS OFTHE REcEss covEB
Apply liquid gasket to the head cover gasket at the
four corners of the recesses.
NOTE:
. Use liquid gasket, Pan No. 08718 - 0001 or 08718- 0003.
. Check that the mating surfaces are clean and dry
before applying liquid gasket.
. Do not install the parts if five minutes or more
have elapsed since applying liquid gasket.
Instead, reapply liquid gasket after removing old
residue.
. After assembly, wait at least 30 minutes before
filling the engine with oil.
8.
9.
I
10.

11. When installing the cylinder head cover, hold the
head cover gasket in the groove by placing your fin-
gers on the camshaft holder contacting surfaces
(top of the semicircles)
Set the spark plug seal on the spark plug tube.
Once the cylinder head cover is on the cylinder
head, slide the cover slightly back and forth to seat
the head cover gasket.
NOTE:
. Before installing the cylinder head cover, clean
the cylinder head contacting surfaces with a
shop towel.
. Do not touch the parts where liquid gasket was
aDolied.
. Take care not to damage the spark plug seals
when installing the cylinder head cover,
. Visually check the spark plug seals for damage.
. Replace any washer that is damaged or deterio-
rated.
6x1.0mm9.8 N.m 11.0 ksf.m,7.2lbf ftl
\g-----*o""t'Ptl
veEE
\_
6-47
12. Tighten the nuts in two or thre€ steps. In the final
step, tighten all bolts, in sequence, to 9 8 N'm (1.0
kgf.m, 7.2 lbf.ft).
NOTE: After assemblv, wait at least 30 minutes
before filling the engine with oil
After installation, check that all tubes, hosss and
connectors are installed correctlY
1?

Cylinder Head
19.
20.
Removal (cont'dl
Remove the timing belt {see page 6-62).
Remove the back cover and camshaft pulleys.
BACK COVER
56 N.m (5.7 kgf m,
41 tbt.f06xl.0mm9.8 N,m (1.0 kgf.m, 7.2 lbf.ft)
21, Remove the exhaust manifold (see page 9-8).
22. Remove the intake manifold (see page g-5).
23. Loosen the adjusting screws.
INTAKE
No.4 No.3 No.2 No. 1
6-70
24. Remove the camshaft holder plates, camshaft hold-ers and camshafts.
CAMSHAFTHOLDER PLATE
Remove the cylinder head bolts, then remove the
cylinder head.
CAUTION: To prevsnt warpage. unscrew the bolts
in sequonc€ 1/3 turn at a tim€; lepeat lh6 sequence
until all bolts aro loosened.
CYLINDER HEAD BOLTS LOOSENING SEOUENCE:
CYLINDER HEADPLUGReplace. t
\1
\€\i
b4CAMSIIAFTS -

I
Cylinder Head
Installation
lnstall the cylinder head in the reverse order of removal:
NOTE:
. Always use a new head and manifold gasket.. The cylinder head gasket is a metal gasket, Take carenot to bend it.
. Rotate the crankshaft, set the No. 1 piston at TDC (seepage 6-63).
. Do not use the middle cover and lower cover forstorang removed items.. Clean the middle cover and lower cover before instal_lation.
o Replace any washers that are damaged or deteriorated.
1. Install the cylinder head gasket, dowel pins and thehead oil control orifice on the cylinder head.
NOTE: Clean the oil control orifice when installing.
DOWEL PIN
6-84
2, Tighten the cylinder head bolts in two steps. In thefirst step, tighten all bolts in sequence to about 29N.m (3.0 kgf.m, 22 tbf.ftl. ln the final step, tighten inthe same sequence to 83 N.m (8.S kgf.m,6t lbf.ft).
NOTE:
. Apply clean engine oil to the bolt threads andunder the bolt head.. We recommend using a beam-type torquewrench. When using a preset-type torque wrench,be sure to tighten slowly and not to overtighten.. lf a bolt makes any noise while you are torquing it,loosen the bolt, and retighten it from the 1st step.
CYLINDER HEAD BOLT TOROUE SEOUENCE
11x 1.5 mm83 N.m 18.5 kgf.m, 61 tbf.ftl
Install the intake manifold and tighten the nuts in acflsscross pattern in two or three steps, beginningwith the inner nuts.. Always use a new intake manifold gasket.
Install the exhaust manifold and tighten the newself-locking nuts in a crisscross pattern in two orthree steps. beginning with the inner nuts.. Always use a new exhaust manifold gasket.
4.