camshaft HONDA INTEGRA 1994 4.G Owner's Manual

Timing Belt
lnstallation
Install the timing belt in the feverse order of removal;
Only key points are described there.
NOTE: Clean the middle cover and lower cover before
installation.
1. Position the crankshaft and the camshaft pulleys as
shown betore installing the timing belt.
A. Set the crankshaft so that the No. 1 piston is at
top dead center {TDC). Align the groove on the
teeth side of the timing belt drive pulley to the V
pointer on the oil pump.
B. Align the TDC marks on intake and exhaust pul-
leys.
2. Install the timing belt tightly in the sequence
shown.
O Timing belt drive pulley (crankshatt) * @
Adjusting pulley * @ water pump pulley * @
Exhaust camshaft pulley * @ Intake camshaft pul-
lev,
(cont'd)
6-51

Timing Belt
Installation (cont'dl
1Loosen and retighten the adjusting bolt to tsnsion
thB belt.
Rotate the crankshaft about 4 or 6 turns countsr-
clockwise so that the belt positions on the pulleys.
Adjust ths timing bolt tension (see pags &48).
Ch€ck ths crankshaft pullsy and the camshaft pul-
lsys at TDC.
CRANKSHAFT PULLEY:
1.lf a camshaft pulley is not positioned at TDC.
.emove the timing belt and adiust the positioning
following the procedure on page 6-51, th6n r6install
rhe riming belt.
NOTE: Refsr to page 6,19 for timing b€lt removal.
Aft€r installation, adiust the tension of each b€lt.
o See section 23 for alternator belt tension adiust-
menr.
. See section 22 tot NC compr€ssor b6lt tension
adjustm€nt.
. See section 17 for P/S pump b6lt t€nsion adiust-
menL
4.
5.
b.
CAMSHAFT PULI..EY:
"UP- MANKS
6-52

Cylinder Head
lllustrated Index
CAUTION: To svoid dsmaging the cylindor h.ad, wsit until tho engino coollnt tomper.turo drop3 bolow 100'F (38'C)
bofore romoving it.
NOTE:
r Use new O-rings and gaskets when reassembling.
. Use liquid gasket, Pan No. 08718 - 0001.
. Replace the rubber seals for oil leakage between the cylinder headand cover.
fterw ,o reassembling, clean all the parts in solvent, dry them, and apply lubricant to any contact parts.
6x1.0mm9.8 N.m (1 .0 kgt'm,7.2tblftl6xl.0mm9.8 N.m {1.0 kgl m, 7.2 lbf.ftl
4qis
CAMSHAFT
f,
f
6 x 1.25 mm2it t*m 12.4 kg[.m,17 rbf.ftl
8 x 1.25 mm27 N.m 12.8 kgt m,20 rbt ft)
CYLINDER HEADCOVERRefer to psge 6-78when instglling.
liquid gasketto thos€ points.INTAKECAMSHAFT
SEALReplace.Replace when damagedor det€riorated,
r 1.25 mm56 N.m 15.7 kg{.m,ial lbf.ft)
Replace.
6-53

Cylinder Head
Removal (cont'dl
Remove the heat shield from the P/S bracket (see
page 5-18).
Remove the air conditioning (Ay'Cl compressor belt(see page 6-49).
Remove the alternator belt {s€e page 6-49).
Remove the cruise control actuato..
16.
17.
'18.
'19.
ACTUATOR
20. Remove the side engine mount.
10 x 1.25 mm
SIDE ENGINE
12 x 1.25 mrn7a N.m 17.5 kgl.m,5a rbtftl
8 x 1.25 mmN.m 12.4 kgf.m, 17 lbtftl
21. Remove the cylinder head cover.
22. Remove the timing belt (see page 6-49).
23. Remove the camshaft pulleys and back cover.
24. Remove the exhaust manifold.
SELF.LOCKING NUT8 x 1 .25 mm31 N.m {3.2 kgt m, 23 lbf.ftlReplace.
6-58
'ilffi{

25. Remove the intake manifold.
26. Loosen the adjusting screws.
INTAKENo.4 No.3 No.2No. 1
No. 4No.3 No. 2EXHAUSTNo. 1
GASKET
21.Remove the camshaft holder plates, camshaft hold-
ers, and camshafts.
CAMSHAFT
28. Remove the cylinder head bolts, then remove the
cylinder head.
CAUTION: To prsvent warpage, unscrew th€ bolts
in sequence l/3 turn at a time; repeat until all bolts
aro loosoned.
CYLINDER HEAD BOLT LOOSENING SEOUENCE
6-59

Camshafts
Inspection
4,
5.
9.
1.
Remove the bolts, then remove the camshaft hold-
ers from the cvlinder head.
NOTE: Unscrew the camshaft holder bolts two
turns at a time, in a crisscross pattern.
Lift camshaft out of cylinder head. wipe clean, then
inspect lift ramps. Replace camshaft if lobes are pit-
ted, scored, or excessively worn.
Clean the camshaft bearing surfaces in the cylinder
head. then set camshaft back in place.
Place a plastigage strip across each journal.
Install the camshaft holders, and then tighten the
bolts to the specified torque as shown in the left
column on this page.
NOTE: Do not rotate camshafts during inspection.
Remove the camshaft holders. Measure widest Dor-
tion of plastigage strip on each journal.
Camshaft-to-Holder Oil Clearance:
Standard {New): 0.050 - 0.089 mm
{0.002 - o.Ooil in)
Sswice Limit: 0.15 mm (0.006 in)
(cont'dl
NOTE:
. Do not rotate the camshaft during inspection.
. Remove the rocker arms and rocker shafts.
1. Put the camshafts and camshaft holders on the
cylinder head, and then tighten the bolts to the
soecified torque.
Specified Torque:
O - @: 8 mm bolts 26 N.m {2.7 kgl.m,20 lbt'ftl(D -(D:6 mm bolts 9.8 N.m {1.0 kgt.m, 7.2 lbf'ftl
Seat each camshaft by pushing it toward distributor
end of the cylinder head.
Zero the dial indicator against end of distributor
drive, then push the camshaft back and forth and
read the end play.
Camshaft End Play:
Standard (New): 0.05 - 0.15 mm
10.002 - 0.006 inl
Sawics Limit: 0.5 mm (0.02 inl
oooo@

Gamshafts
Inspection (cont'd)
10, lf camshaft-to-holder oil clearance is out of loler-
ance:
- And camshaft has already been replaced, you
must replace the cylinder head.
- lf camshaft has not been replaced, first check
total runout with the camshaft supported on V-
blocks.
Camehaft Total Runout:
Sisndard (New): 0.015 mm (0.0006 inl
Service Limit: 0.03 mm (0.0012 in)
Rotat€ camshsftwhile measuring
- lf the total runout of the camshaft is within toler-
ance, replace the cylinder head.- lf the total runout is out of tolerance, r€Dlace the
camshaft and recheck. lf the oil clearance is still
out of tolerance. replace the cylinder head.
6-66
IiITAKEEXHAUST
PRIMARY33.i{'l1 mm
(1.3154 inl
33.111 mm(1.3036 in)
MID36.377 mm
l't.4322 inl
35.720 mm
(1.4063 inl
SECONDARY34.547 mm(1.3601 in)
34.381 mm(1.3536 in)
11. Check cam lobe wear.
Clm Lobs Hcight Standard (N.w):
Check this are6 tor wsar.
Crm Porition
INTAKE
MtosEc
CXHAUST
SEC MID PRI
fTt-]--Tt-Tt-l
\ll il il|/



tt ttlLIL__H___}{-}U
ftBftB
T/B: nMING BELTPRI: PRIMAFYMID: MIDSEC: SECONDARY

1.As illustrated in the removal steps ot this proce-
dure. use a commercially - available air-impact
driver attachment modified to fit the diameter of the
valve guides. In most cases, the same procedure
can be done using the Valve Guide Driver and a
conventional hammer,
COMMCRCIALLY.AVAILABLEVALVE GUIDE DRIVER
az mm +- sz mm{3.43 inl I tz.zt in)
tfr
10.8 mm10.42 inl
5.3 mm(0.21 inl I
_{l
R.mov.l and In3trll.tionVALVE GUIDE DRIVER.5.5 mm07742 - q)101tt0
Select the proper replacement guides and chill
them in the freezer section of a refrigerator for
about an hour.
Use a hot plate or oven to evenly heat the cylinder
head to 300'F (150"c). Monitor the temperature with
a cooking thermometer.
CAUTION:
. Do not us9 a iorch; it may warp ths hsad.
. Do not get ths head hottor than 300"F (150"C);
excsssivo hgat may loogen the valvo soaG.
. To avoid burns, use hsaw glovo3 whon handling
the heated cylindor h€ad.
Working from the camshaft side, use the driver and
an air hammer to drive the guide about 2 mm (0.1
in) towards the combustion chamber. This will
knock off some of the carbon and make removal
easier.
CAUTION:
. Always wear ssfcty gogglos 01 a taca rhiold
whcn using thc air hrmmcr,
. Hold tho.ir hammer diroctly in line with tho
v6lvo goido to prov.nt drmaging tho driv6r.
Turn the head over and drive the guide out toward
the camshaft side of head.
lf a valve guide still won't move, drill it out with a
8.0 mm (5/16 in) bit, then try again.
CAUTION; Drill guid6 only in oxtromc cs3os: you
could dlmsgo tho cylinder hoad if tho guidc brcakr.
VALVE GUIDE DBIVER.5.5 mm07742 - 0010100
6.Remove the new guide(s) from the refrigerator, one
at a time, as vou need them.(cont'd)
l o -_ -\
i oc)

Valve Guides
Replacement (cont'dl
7. Slip a 6 mm {0.2 in) steel washer and the correct
driver attachment over the end of the driver (The
washer will absorb some of the imDact and extendthe life of the driver).
:=:-/--PDRIVER6 mm 10.2 int ATTACHMENTWASHER
Install the new guide(s) from the camshaft side ofthe head; drive each one in until the attachment
bottoms on the head. lf you have all sixteen guides
to do, Vou may have to reheat the head one or twomore times.
Valve Guide Installed Height:
Intake: 12.55 - 13.05 mm {0.49it - 0.51it inl
Exhaust 12.55 - 13.05 mm {0.494 - 0.514 inl
VALVE GUIDE
Reaming
NOTE: For new valve guides only.
1. Coat both reamer and valve guide with cutting oil.
2, Rotate the reamer clockwise the full length of thevalve guide bore.
3. Continue to rotate the reamer clockwise whileremoving it from the bore.
4. Thoroughly wash the guide in detergent and waterto remove any cutting residue.
5. Check clearance with a valve (see page 6-70).
. Verify that the valve slides in the intake and ex-haust valve guides without exerting pressure.
REAMER HANDLE
Turn reamer inclockwise directiononry.
C'
o
a
-'{)
6-72

Gylinder Head
Warpage
NOTE: lf camshaft-to-holder oil clearances (see page
6-65) are not within specification. the head cannot be
.esurfaced.
lf camshaft-to-holder oil clearances are within sDecifica-
tions, check the head for warpage.
Measure along edges. and 3 ways across center.
lf warpage is less than 0.05 mm {0.002 in) cylinder
head resurfacing is not required.
lf warpage is between 0.05 mm {0,002 in) and 0.2 mm
{0.008 in), resurface cvlinder head.
Maximum resurface limit is 0.2 mm {0.008 in) based
on a height of 142 mm (5.59 in).
PRECISION STRAIGHT EDGE
Cylindsr Hssd Height:
Standard lNsw): 1i11.95 - 1,f2.05 mm
15.s89 - 5.593 inl
6-74